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  • By using " editingStyleForRowAtIndexPath " method , " didSelectRowAtIndexPath " method is not calle

    - by Madan Mohan
    Hi, the delegate method not called -(void)viewWillAppear:(BOOL)animated { [theTableView setEditing:TRUE animated:TRUE]; } -(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath { return UITableViewCellEditingStyleDelete; } by calling the above the methods i will get minus component before each cell in table view. But the below method didSelectRowAtIndexPath is not called and disclouser indicator is not in visible. (void )tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { [theTableView deselectRowAtIndexPath:indexPath animated:YES]; ContactEditViewCotroller *contactEditViewCotroller=[[ContactEditViewCotroller alloc]init]; contactEditViewCotroller.isEdit=isEdit; if(isEdit == YES) { for(int i=0; i<=[editObject.contactList count]-1;i++) { if(indexPath.section == i) { appDelegate.isAddInEdit=NO; editcontacts = [editObject.contactList objectAtIndex:i]; contactEditViewCotroller.editcontacts=editcontacts; indexRow=i; } } } else { for(int i=0; i<=[addContactList count]-1;i++) { if(indexPath.section == i) { appDelegate.isAddInEdit=NO; Contacts *obj = [addContactList objectAtIndex:i]; contactEditViewCotroller.addcontacts=obj; } } } [[self navigationController] pushViewController:contactEditViewCotroller animated:YES]; [contactEditViewCotroller release]; }

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  • UIScrollview calling superviews layoutSubviews when scrolling?

    - by marchinram
    Hello, I added a UITableView as a subview to a custom UIView class I'm working on. However I noticed that whenever I scroll the table it calls my classes layoutSubviews. I'm pretty sure its the UIScrollview that the table is inheriting from which is actually doing this but wanted to know if there is a way to disable this functionality and if not why is it happening? I don't understand why when you scroll a scrollview it needs its superview to layout its subviews. Code: @implementation CustomView - (id)initWithFrame:(CGRect)frame { if ((self = [super initWithFrame:frame])) { self.clipsToBounds = YES; UITableView *tableView = [[UITableView alloc] initWithFrame:CGRectMake(0.0, 15.0, 436.0, 132.0) style:UITableViewStylePlain]; tableView.dataSource = self; tableView.delegate = self; tableView.separatorStyle = UITableViewCellSeparatorStyleNone; tableView.backgroundColor = [UIColor clearColor]; tableView.showsVerticalScrollIndicator = NO; tableView.contentInset = UIEdgeInsetsMake(kRowHeight, 0.0, kRowHeight, 0.0); tableView.tag = componentIndex; [self addSubview:tableView]; [tableView release]; } return self; } - (void)layoutSubviews { // This is called everytime I scroll the tableview } @end

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  • Printing Pdf using AirPrint causes cut-off content

    - by Jatin Patel
    Here i am printing pdf with size 'pageSize = CGSizeMake(640, 832);'. this size is larget then A4 size page aspected. so i will cut-off some text(means it will not print whole page). while printing same pdf using MAC, it will print whole page with help of option (scale to fit). so can any one help me to come out from this problem.. is there any option in IOS sdk for scale to fit. here is my code.. -(void)printItem { NSArray *aArrPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) ; NSString *aStr = [[aArrPaths objectAtIndex:0] stringByAppendingPathComponent:[NSString stringWithFormat:@"PropertyReport_%d.pdf",self.propertyId]]; // NSString *aStr = [[NSBundle mainBundle] pathForResource:@"TRADUZIONE HELP SECTIONS REV2" ofType:@"pdf"]; NSURL *url=[[NSURL alloc] initFileURLWithPath:aStr]; NSData *data=[[NSData alloc] initWithContentsOfURL:url]; printController = [UIPrintInteractionController sharedPrintController]; if(printController && [UIPrintInteractionController canPrintData:data]) { printController.delegate = self; UIPrintInfo *printInfo = [UIPrintInfo printInfo]; printInfo.outputType = UIPrintInfoOutputGeneral; //printInfo.jobName = [NSString stringWithFormat:@"New Image"]; printInfo.duplex = UIPrintInfoDuplexLongEdge; printController.printInfo = printInfo; printController.showsPageRange = YES; printController.printingItem = data; void (^completionHandler)(UIPrintInteractionController *, BOOL, NSError *) = ^(UIPrintInteractionController *printController, BOOL completed, NSError *error) { if (!completed && error) { //NSLog(@"FAILED! due to error in domain %@ with error code %u", error.domain, error.code); } }; // aWebViewPDF.hidden=FALSE; [printController presentAnimated:YES completionHandler:completionHandler]; } } Thanks Jatin Patel

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  • UIWebViewDelegate returns different error message on iPod Touch 2G and 3G

    - by lostInTransit
    Hi I have an app developed using SDK 3.0. My view has a UIWebView whose delegate is the viewcontroller. I want to show an error message when the webview does not load (in case the touch goes out of wifi range or wifi is turned off) I override this method to show an alert - (void)webView:(UIWebView *)wbView didFailLoadWithError:(NSError *)error But this caused an issue when some links were clicked on the webview. The page loaded but if some images from the previous page were not loaded, the method call was triggered. Testing on an iPod Touch 3G, the NSError's userInfo has the localized description as no Internet connection if load fails due to no internet connection. But this only seems to be true for an iPod Touch 3G. 2G shows a different message (I got to know from some beta testers. They aren't very technical so can't tell them to get me the logs or anything.) Can anyone with an iPod Touch 2G tell me the values for the NSError userInfo? Or better still, did anyone else face this issue? How did you resolve it? Thanks.

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  • Graceful termination of NSApplication with Core Data and Grand Central Dispatch (GCD)

    - by Vincent Mac
    I have an Cocoa Application (Mac OS X SDK 10.7) that is performing some processes via Grand Central Dispatch (GCD). These processes are manipulating some Core Data NSManagedObjects (non-document-based) in a manner that I believe is thread safe (creating a new managedObjectContext for use in this thread). The problem I have is when the user tries to quit the application while the dispatch queue is still running. The NSApplication delegate is being called before actually quitting. - (NSApplicationTerminateReply)applicationShouldTerminate:(NSApplication *)sender I get an error "Could not merge changes." Which is somewhat expected since there are still operations being performed through the different managedObjectContext. I am then presented with the NSAlert from the template that is generated with a core data application. In the Threading Programming Guide there is a section called "Be Aware of Thread Behaviors at Quit Time" which alludes to using replyToApplicationShouldTerminate: method. I'm having a little trouble implementing this. What I would like is for my application to complete processing the queued items and then terminate without presenting an error message to the user. It would also be helpful to update the view or use a sheet to let the user know that the app is performing some action and will terminate when the action is complete. Where and how would I implement this behavior?

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  • Trying to debug a 'Assertion failure in -[UIActionSheet showInView:]' error....

    - by dsobol
    I am working through "Beginning iPad Application Development" and am getting hung up in Chapter 3 where I have created a project that works with an Action Sheet. As it stands now, my application loads into the simulator just fine with no errors that I am aware of, but as it runs, it crashes with the following errors showing up in the debugger window: 2010-05-31 19:44:39.703 UsingViewsActionSheet[49538:207] * Assertion failure in -[UIActionSheet showInView:], /SourceCache/UIKit_Sim/UIKit-1145.66/UIAlert.m:7073 2010-05-31 19:44:39.705 UsingViewsActionSheet[49538:207] * Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Invalid parameter not satisfying: view != nil' I am sure that this is the block where the app breaks based upon my use of breakpoints. //Implement viewDidLoad to do additional setup after loading the view, typically from a nib. - (void)viewDidLoad { UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:@"This is my Action Sheet!" delegate:self cancelButtonTitle:@"OK" destructiveButtonTitle:@"Delete Message!" otherButtonTitles:@"Option 1", @"Option 2", @"Option 3", nil]; [action showInView:self.view]; // <-- This line seems to trigger the crash.... [action release]; [super viewDidLoad]; } Am I missing something obvious, or is there more to the problem than is shown here? I have looked at the abstract for showInView and cannot divine anything there yet. I appreciate any and all asssitance. Regards, Steve O'Sullivan

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  • Problem with NSUserDefaults and deallocated Instance

    - by Peter A
    Hi, I'm having a problem with NSUserDefaults. I've followed the steps in the books as closely as I can for my app, but still get the same problem. I am getting a *** -[NSUserDefaults integerForKey:]: message sent to deallocated instance 0x3b375a0 error when I try and load in the settings. Here is the code that I have, it is in the App Delegate class. - (void)applicationDidFinishLaunching:(UIApplication *)application { recordingController = [[RecordingTableViewController alloc] initWithStyle:UITableViewStylePlain]; [recordingController retain]; // Add the tab bar controller's current view as a subview of the window [window addSubview:tabBarController.view]; [self loadSettings]; } -(void)loadSettings { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; NSNumber loop = [defaults objectForKey:@"loop_preference"]; NSNumber play = [defaults objectForKey:@"play_me_preference"]; NSNumber volume = [defaults objectForKey:@"volume_preference"]; } As you can see I am not trying to do anything with the values yet, but I get the error on the line reading in the loop preference. I also get it if I try and read an NSString. Any suggestions would be greatly appreciated. Thanks Peter

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  • UIScrollView notifications

    - by ryyst
    Hi, I'm coding an app that works much like Apple's Weather.app: There's a UIPageControl at the bottom and a UIScrollView in the middle of the screen. In my code, I implemented the - (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView method to figure out when the user did move to a new page. If they move to a new page, I load the adjacent pages' data, as to make further page-switching faster. (In one of Apple's examples, the - (void)scrollViewDidScroll:(UIScrollView *)sender is used, but that causes my app to shortly hang when loading a new page, so it's not suitable.) That code works very well. I'm using scrollRectToVisible:: to programmatically scroll inside the scrollview when the user clicks the UIPageControl. The problem is that the scrollRectToVisible: doesn't post a notification to the UIScrollViewDelegate when it's done scrolling - so the code responsible for loading adjacent pages never get's called when using the UIPageControl. Is there any way to make the UIScrollView notify its delegate when it gets called by the scrollRectToVisible: method? Or will I have to use threads in order to prevent my app from freezing? Thanks! -- Ry

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  • Tracking iPhone on Yahoo Web Analytics using ASIHTTPRequest

    - by Mads Mobæk
    I'm trying to track an event in my app using Yahoo Web Analytics. The code I am using looks like ASIHTTPRequest *yahooTrack = [ASIHTTPRequest requestWithURL: [NSURL URLWithString:@"http://s.analytics.yahoo.com/p.pl?a=xxxxxxxxxxxxx&js=no&b=yyyyyyyyyyyy&cf6=zzzzzzzzzzz"]]; yahooTrack.didFinishSelector = @selector(statisticsFinished:); yahooTrack.delegate = self; [yahooTrack startAsynchronous]; Then the statisticsFinished looks like: NSLog(@"Cookies: %@", request.requestCookies); NSLog(@"Redircount: %d", [request redirectCount]); NSLog(@"Responsecode %d %@\nMsg: %@", request.responseStatusCode, request.responseStatusMessage, [request responseString]); And all the information I get back looks correct. Cookies are set, redirectcount is 1 the first time (as it redirects to s.analytics.yahoo.com/itr.pl?.... a normal browser does). Then the redirectcount is 0 for subsequent request until the app is restarted and session cleared. The responseString returns GIF89a. Even if the data looks correct, Yahoo still won't track. As soon as I call the tracking url directly in my browser it works as expected. I realize Flurry is a better option, but I'm forced to use Yahoo in this case. Also, using a UIWebView probably would work, but I'm against putting in a webview just for tracking purposes. Is there any difference in how ASIHTTPRequest and Safari would handle a call to a simple URL as this? Or do you see anything else that could explain why the tracking isn't working?

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  • Saving data - does work on Simulator, not on Device

    - by Peter Hajas
    I use NSData to persist an image in my application. I save the image like so (in my App Delegate): - (void)applicationWillTerminate:(UIApplication *)application { NSLog(@"Saving data"); NSData *data = UIImagePNGRepresentation([[viewController.myViewController myImage]image]); //Write the file out! NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path_to_file = [documentsDirectory stringByAppendingString:@"lastimage.png"]; [data writeToFile:path_to_file atomically:YES]; NSLog(@"Data saved."); } and then I load it back like so (in my view controller, under viewDidLoad): NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSString *path_to_file = [documentsDirectory stringByAppendingString:@"lastimage.png"]; if([[NSFileManager defaultManager] fileExistsAtPath:path_to_file]) { NSLog(@"Found saved file, loading in image"); NSData *data = [NSData dataWithContentsOfFile:path_to_file]; UIImage *temp = [[UIImage alloc] initWithData:data]; myViewController.myImage.image = temp; NSLog(@"Finished loading in image"); } This code works every time on the simulator, but on the device, it can never seem to load back in the image. I'm pretty sure that it saves out, but I have no view of the filesystem. Am I doing something weird? Does the simulator have a different way to access its directories than the device? Thanks!

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  • How you would you describe the Observer pattern in beginner language?

    - by Sheldon
    Currently, my level of understanding is below all the coding examples on the web about the Observer Pattern. I understand it simply as being almost a subscription that updates all other events when a change is made that the delegate registers. However, I'm very unstable in my true comprehension of the benefits and uses. I've done some googling, but most are above my level of understanding. I'm trying to implement this pattern with my current homework assignment, and to truly make sense on my project need a better understanding of the pattern itself and perhaps an example to see what its use. I don't want to force this pattern into something just to submit, I need to understand the purpose and develop my methods accordingly so that it actually serves a good purpose. My text doesn't really go into it, just mentions it in one sentence. MSDN was hard for me to understand, as I'm a beginner on this, and it seems more of an advanced topic. How would you describe this Observer pattern and its uses in C# to a beginner? For an example, please keep code very simple so I can understand the purpose more than complex code snippets. I'm trying to use it effectively with some simple textbox string manipulations and using delegates for my assignment, so a pointer would help!

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  • iPhone:Tabbar hides when pushing from TableView to UIViewController

    - by user187532
    Hello all, I have four Tab bar items in a Tab bar which is being bottom of the view where i have the TableView. I am adding Tab bar and items programmatically (Refer below code) not through I.B. Click on first three Tab bar items, will show the data in the same TableView itself. But clicking on last Tab bar items will push to another UIViewcontroller and show the data there. The problem here is, when i push to the viewController when clicking on last Tab bar item, main "Tab bar" is getting removed. Tab bar code: UITabBar *tabBar = [[UITabBar alloc] initWithFrame:CGRectMake(0, 376, 320, 44)]; item1 = [[UITabBarItem alloc] initWithTitle:@"First Tab" image:[UIImage imageNamed:@"first.png"] tag:0]; item2 = [[UITabBarItem alloc] initWithTitle:@"Second Tab" image:[UIImage imageNamed:@"second.png"] tag:1]; item3 = [[UITabBarItem alloc] initWithTitle:@"Third Tab" image:[UIImage imageNamed:@"third.png"] tag:2]; item4 = [[UITabBarItem alloc] initWithTitle:@"Fourth Tab" image:[UIImage imageNamed:@"fourth.png"] tag:3]; item5 = [[UITabBarItem alloc] initWithTitle:@"Fifth Tab" image:[UIImage imageNamed:@"fifth.png"] tag:4]; NSArray *items = [NSArray arrayWithObjects: item1,item2,item3,item4, item5, nil]; [tabBar setItems:items animated:NO]; [tabBar setSelectedItem:item1]; tabBar.delegate=self; [self.view addSubview:tabBar]; Push controller code clicking from last Tab bar item: myViewController = [ [MyViewController alloc] initWithNibName:@"MyView" bundle:nil]; myViewController.hidesBottomBarWhenPushed=NO; [[self navigationController] pushViewController:myViewController animated:NO]; I am not seeing bottom Tab bar when i push my current TableView to myViewController. I am seeing full screen view there. I want to see bottom Tab bar always when every tab item clicked. What might be the problem here? Could someone who come across this issue, please share your suggestion to me? Thank you.

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  • Using GKPeerPickerController within a selector from a Cocos2D CCMenuItem

    - by Mark Hazlett
    Hey everyone, So i'm trying to use GameKit along with Cocos2D so that when a user clicks on the multiplayer menu item it will display the GKPeerPickerController. I'm however, running into some snags. It doesn't seem to want to compile. However, it doesn't give me an error inside of the code that's in my selector. Anyways here's the code... @implementation GameOverLayer - (id) init { self = [super init]; if (self != nil) { [CCMenuItemFont setFontSize:20]; [CCMenuItemFont setFontName:@"Helvetica"]; CCMenuItem *start = [CCMenuItemFont itemFromString:@"Play Again!" target:self selector:@selector(startGame:)]; CCMenuItem *connect = [CCMenuItemFont itemFromString:@"Multiplayer" target:self selector:@selector(connect:)]; CCMenu *menu = [CCMenu menuWithItems:start,connect, nil]; [menu alignItemsVertically]; [self addChild:menu]; } return self; } -(void)startGame: (id)sender { [[CCDirector sharedDirector] replaceScene: [HelloWorld scene]]; } -(void)connect: (id)sender { GKPeerPickerController *peerPicker; peerPicker = [[GKPeerPickerController alloc] init]; peerPicker.delegate = self; peerPicker.connectionTypesMask = GKPeerPickerConnectionTypeOnline | GKPeerPickerConnectionTypeNearby; [peerPicker show]; } @end The error message i'm getting is... ".obj_class_name_GKPeerPickerController", referenced from: Literal-Pointer@_OBJC@_cls_refs@GKPeerPickerController in GameOverScene.o Symbol(s) not found Collect2: id returned 1 exit status Any ideas?

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  • iPad start in Landscape receive only touch within 768x768

    - by user1307179
    It works perfect fine when starting in portrait and also works when you rotate from portrait to landscape and back. It does not work when starting in landscape. But then it works when you rotate from landscape to portrait and back. In landscape starting mode, the screen does not respond with any touch where screen coordinateX greater than 768. What happens in code is, I use status bar orientation to determine original orientation and rotate each view manually. The views display correctly but does not receive touch properly. Then my root view controller will get called when ipad start rotating with: - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration which will rotate every subviews. Root controller: - (void)loadView { self.view = [[UIView alloc]init ]; //initialize child views [self willRotateToInterfaceOrientation:0 duration:0]; } - (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration { if ([model isLandscape]) { self.view.frame = CGRectMake(0, 0, 1024, 768-80); } else { self.view.frame = CGRectMake(0, 0, 768, 1024-80); } //rotate child views } My code [model isLandscape] works so I don't need to provide details as to how it works but here are the code anyway: - (bool)isLandscape { if (orientation == UIInterfaceOrientationLandscapeLeft || orientation == UIInterfaceOrientationLandscapeRight) return true; else return false; } -(id) init { [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientationChanged:) name:UIDeviceOrientationDidChangeNotification object:nil]; } - (void)orientationChanged:(NSNotification *)notification { UIInterfaceOrientation curOrientation = [[UIDevice currentDevice] orientation]; if (curOrientation == UIDeviceOrientationPortrait || curOrientation == UIDeviceOrientationPortraitUpsideDown || curOrientation == UIDeviceOrientationLandscapeLeft || curOrientation == UIDeviceOrientationLandscapeRight) { orientation = curOrientation; ((AppDelegate*)([UIApplication sharedApplication].delegate)).savedOrientationForRestart = orientation; NSLog(@"changed"); } } -(void)validateOrientation { //first time when initializing orientation UIInterfaceOrientation curOrientation = [[UIDevice currentDevice] orientation]; if (curOrientation != UIDeviceOrientationPortrait && curOrientation != UIDeviceOrientationPortraitUpsideDown && curOrientation != UIDeviceOrientationLandscapeLeft && curOrientation != UIDeviceOrientationLandscapeRight) { orientation = [[UIApplication sharedApplication] statusBarOrientation]; } }

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  • Why isn't my UITableView in a popover appearing in the correct scroll position?

    - by zbrimhall
    I have a split view-based app that presents a master-detail interface, and uses a popover to present the master list when in portrait mode. The popover presents a sectioned table view that ultimately gets populated by a subclass of NSFetchedResultsController. I can tap the tool bar button to present the master list, scroll to whatever row, and tap the row to dismiss the popover. My problem is that if the table is scrolled past the top of the second section, when I dismiss the popover and then later tap the toolbar button to re-present it, the table's scroll position is always set such that the first row of the second section is at the top of the list. If I haven't scrolled past the top of the second section, it correctly remembers its scroll position when the table is presented again. Similarly, in landscape mode, if I scroll the table past the top of the third section and then rotate to portrait, when I come back to landscape the scroll position is always set such that the first row of the third section is at the top of the list. I tried calling -scrollToNearestSelectedRowAtScrollPosition:animated in both the master view controller's -viewWillAppear, as well as in the split view delegate's splitViewController:popoverController:willPresentViewController:, to no effect. Anybody have a clue what I might be doing wrong?

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  • Why Is Bottom Half of Custom UIActionSheet with UIDatePicker Disabled?

    - by Gorgando
    Everything seems to be working great with my UIActionSheet that contains a UIDatePicker except that the bottom half of the DatePicker is disabled. Visually there is a shadow that makes the bottom half of the picker darker than the top half. Everything in the bottom half is disabled and I can't for the life of me figure out how to enable it. I also noticed in my other "normal" UIActionSheets that just contain buttons, the bottom half of the cancel buttons are disabled. This is the code for my custom UIActionSheet: self.datePickerView = [[UIDatePicker alloc] init]; self.datePickerView.datePickerMode = UIDatePickerModeDate; self.actionSheet = [[UIActionSheet alloc] initWithTitle:@"Choose a Follow-up Date" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:@"Done", nil]; [self.actionSheet showInView:self.view]; [self.actionSheet addSubview:self.datePickerView]; [self.actionSheet sendSubviewToBack:self.datePickerView]; [self.actionSheet setBounds:CGRectMake(0,0,320, 500)]; CGRect pickerRect = self.datePickerView.bounds; pickerRect.origin.y = -95; self.datePickerView.bounds = pickerRect; I've tried several things including sendSubviewToBack, BringSubviewToFront, etc but I have not had any luck. I appreciate your help!

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  • [NSFetchedResultsController sections] returns nil?

    - by Chris
    Hi Everyone, I am trying to resolve this for days at this stage and I'm hoping you can help. I have two ViewControllers which query two different tables from the same database using Core Data. The first ViewController is opened with the app and displays fine. The second is called from within the first ViewController, using a pretty standard fetch setup: - (NSFetchedResultsController *)fetchedClients { // Set up the fetched results controller if needed. if (fetchedClients == nil) { // Create the fetch request for the entity. NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] init]; // Edit the entity name as appropriate. NSEntityDescription *entity = [NSEntityDescription entityForName:@"Clients" inManagedObjectContext:managedObjectContext]; [fetchRequest setEntity:entity]; // Edit the sort key as appropriate. NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"clientsName" ascending:YES]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [fetchRequest setSortDescriptors:sortDescriptors]; // Edit the section name key path and cache name if appropriate. // nil for section name key path means "no sections". NSFetchedResultsController *aFetchedResultsController = [[NSFetchedResultsController alloc] initWithFetchRequest:fetchRequest managedObjectContext:managedObjectContext sectionNameKeyPath:nil cacheName:@"Root"]; aFetchedResultsController.delegate = self; self.fetchedClients = aFetchedResultsController; [aFetchedResultsController release]; [fetchRequest release]; [sortDescriptor release]; [sortDescriptors release]; } return fetchedClients; } When I call [self.fetchedClients sections], I get a nil (0x0) return. I have examined the database using an external application to ensure data exists in the "Clients" table. Can anyone think of a reason why [self.fetchedClients sections] would return nil? Many thanks for any help you can provide. Regards, Chris

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  • iPhone accelerometer:didAccelerate: seems to not get called while I am running a loop

    - by AJ
    An accelerometer related question. (Sorry the formatting may not look right, its the first time I am using this site). I got the accelerometer working as expected using the standard code UIAccelerometer *accel = [UIAccelerometer sharedAccelerometer]; accel.delegate = self; accel.updateInterval = 0.1; //I also tried other update values I use NSLog to log every time the accelerometer:didAccelerate: method in my class is called. The function gets called as expected and everything works fine till here. However, when I run a loop, the above method doesn't seem to get called. Something like this float firstAccelValue = globalAccel; //this is the x-accel value (stored in a global by the above method) float nextAccelValue = firstAccelValue; while (nextAccelValue == firstAccelValue){ //do something nextAccelValue = globalAccel; // note globalAccel is updated by the accelerometer method } The above loop never exits, expectedly since the accelerometer:didAccelerate: method is not getting called, and hence globalAccel never changes value. If I use a fixed condition to break the while loop, I can see that after the loop ends, the method calls work fine again. Am I missing something obvious here? Or does the accelerometer method not fire when certain processing is being done? Any help would be greatly appreciated! Thanks!

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  • Can't contravariance be solved with interfaces?

    - by Sir Psycho
    Hi, I'm at the point where I'm starting to grasp contravariance, although I'm trying to work out what the advantage is when an interface can be used instead. Obviously I'm missing something. Here is the c#4 example class Dog : Animal { public Dog(string name) : base(name) { } } class Animal { string _name; public Animal(string name) { _name = name; } public void Walk() { Console.WriteLine(_name + " is walking"); } } Action<Animal> MakeItMove = (ani) => { ani.Walk(); }; Action<Dog> MakeItWalk = MakeItMove; MakeItWalk(new Dog("Sandy")); Same example which works in earlier versions on c# class Dog : Animal { public Dog(string name) : base(name) { } } class Animal : IAnimal { string _name; public Animal(string name) { _name = name; } public void Walk() { Console.WriteLine(_name + " is walking"); } } interface IAnimal { void Walk(); } Action<IAnimal> MakeItMove = (ani) => { ani.Walk(); }; Action<IAnimal> MakeItWalk = MakeItMove; MakeItWalk(new Dog("Sandy")); These may not be the best examples, but I still can't seem to 'get it'. Is the in keywork defined on the action delegate simply a short hand syntax way like lamda is to delegates?

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  • Backwards compatibility when using Core Data

    - by Alex
    Could anybody shed some light as to why is my app crashing with the following error on iPhone OS 2.2.1 dyld: Symbol not found: _OBJC_CLASS_$_NSPredicate Referenced from: /var/mobile/Applications/456F243F-468A-4969-9BB7-A4DF993AE89C/AppName.app/AppName Expected in: /System/Library/Frameworks/Foundation.framework/Foundation I have weak linked CoreData.framework, and have the Base SDK set to 3.0 and Deployment Target set to SDK 2.2 The app already uses other 3.0 features when available and I did not have any problems with those. But apparently the backward-compatibility methods used for other features do not work with Core Data. The app crashes before app delegate's applicationDidFinishLaunching gets called. Here's the debugger log: [Session started at 2010-05-25 20:17:03 -0400.] GNU gdb 6.3.50-20050815 (Apple version gdb-1119) (Thu May 14 05:35:37 UTC 2009) Copyright 2004 Free Software Foundation, Inc. GDB is free software, covered by the GNU General Public License, and you are welcome to change it and/or distribute copies of it under certain conditions. Type "show copying" to see the conditions. There is absolutely no warranty for GDB. Type "show warranty" for details. This GDB was configured as "--host=i386-apple-darwin --target=arm-apple-darwin".tty /dev/ttys001 Loading program into debugger… sharedlibrary apply-load-rules all warning: Unable to read symbols from "MessageUI" (not yet mapped into memory). warning: Unable to read symbols from "CoreData" (not yet mapped into memory). Program loaded. target remote-mobile /tmp/.XcodeGDBRemote-12038-42 Switching to remote-macosx protocol mem 0x1000 0x3fffffff cache mem 0x40000000 0xffffffff none mem 0x00000000 0x0fff none run Running… [Switching to thread 10755] [Switching to thread 10755] Re-enabling shared library breakpoint 1 Re-enabling shared library breakpoint 2 Re-enabling shared library breakpoint 3 Re-enabling shared library breakpoint 4 Re-enabling shared library breakpoint 5 (gdb) continue warning: Unable to read symbols for ""/Users/alex/iPhone Projects/AppName/build/Debug-iphoneos"/AppName.app/AppName" (file not found). dyld: Symbol not found: _OBJC_CLASS_$_NSPredicate Referenced from: /var/mobile/Applications/456F243F-468A-4969-9BB7-A4DF993AE89C/AppName.app/AppName Expected in: /System/Library/Frameworks/Foundation.framework/Foundation (gdb)

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  • AVAudioPlayer working in Simulator, but not on device

    - by cannyboy
    My mp3 playing code is: NSError *error; soundObject = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:audioPathString] error:&error]; if (soundObject == nil) NSLog(@"%@", [error description]); soundObject.delegate = self; soundObject.numberOfLoops = 0; soundObject.volume = 1.0; NSLog(@"about to play"); [soundObject prepareToPlay]; [soundObject play]; NSLog(@"[soundObject play];"); The mp3 used to play fine, and it still does on the simulator. But not on the device. I've recently added some sound recording code (not mine) to the software. It uses AudioQueue stuff which is slightly beyond me. Does that conflict with AVAudioPlayer? Or what could be the problem? I've noticed that as soon as the audiorecording code starts working, I can't adjust the volume on the device anymore, so maybe it blocks the audio playback?. EDIT The solution seems to be to put this in my code. I put it in applicationDidFinishLaunching: [[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecord error: nil]; UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker; AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,sizeof (audioRouteOverride),&audioRouteOverride); The first line allows both play and record, whilst the other lines apparently reroute things to make the volume louder. All audio code is voodoo to me.

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  • How to create an Universal Binary for iTunes Connect Distribution?

    - by balexandre
    I created an app that was rejected because Apple say that my App was not showing the correct iPad window and it was showing the same iPhone screen but top left aligned. Running on simulator, I get my App to show exactly what it should, a big iPad View. my app as Apple referees that is showing on device: my app running the simulator (50% zoom only): my code in the Application Delegate is the one I published before - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // The default have the line below, let us comment it //MainViewController *aController = [[MainViewController alloc] initWithNibName:@"MainView" bundle:nil]; // Our main controller MainViewController *aController = nil; // Is this OS 3.2.0+ ? #if __IPHONE_OS_VERSION_MAX_ALLOWED >= 30200 if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) // It's an iPad, let's set the MainView to our MainView-iPad aController = [[MainViewController alloc] initWithNibName:@"MainView-iPad" bundle:nil]; else // This is a 3.2.0+ but not an iPad (for future, when iPhone/iPod Touch runs with same OS than iPad) aController = [[MainViewController alloc] initWithNibName:@"MainView" bundle:nil]; #else // It's an iPhone/iPod Touch (OS < 3.2.0) aController = [[MainViewController alloc] initWithNibName:@"MainView" bundle:nil]; #endif // Let's continue our default code self.mainViewController = aController; [aController release]; mainViewController.view.frame = [UIScreen mainScreen].applicationFrame; [window addSubview:[mainViewController view]]; [window makeKeyAndVisible]; return YES; } on my target info I have iPhone/iPad My question is, how should I build the app? Use Base SDK iPhone Simulator 3.1.3 iPhone Simulator 3.2 my Active Configuration is Distribution and Active Architecture is arm6 Can anyone that already published app into iTunes Connect explain me the settings? P.S. I followed the Developer Guideline on Building and Installing your Development Application that is found on Creating and Downloading Development Provisioning Profiles but does not say anything regarding this, as I did exactly and the app was rejected.

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  • How to add a user to a SharePoint group programatically - Access is Denied

    - by Josh
    I have tried and tried to add a user to a SharePoint group using C# programatically (using a non-site admin). If I am logged in as a site admin, it works fine... but, if I am logged in as a non-site admin then I get an access is denied error. After doing some investigation I found that I needed to either "impersonate" the user (which didn't seem to work) or "ensure the user", so I have ended up at this code (which has worked for some people). Can some help explain to me why the following does not work and still gives me an Access is Denied error? SPSecurity.RunWithElevatedPrivileges(delegate() { using (SPSite site = new SPSite(SPControl.GetContextSite(HttpContext.Current).Url)) //have also tried passing in the ID - doesn't make a difference { using (SPWeb web = site.OpenWeb()) { web.AllowUnsafeUpdates = true; // add user to group SPGroup group = this.Web.Groups[groupList.Items[i].Value]; SPUser spUser = web.EnsureUser(provider + ":" + user.UserName); //provider is previously defined spUser.Email = user.Email; spUser.Name = txtFullName.Text; group.AddUser(spUser); // update group.Update(); } } }

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  • iphone menu navigation with buttons help requested

    - by David
    Hi, I'm trying to program an iphone app that will have several different (sub)apps. Ideally, I want to know how to make the main menu for this app look and behave like the iphone's own app menu, but I can't figure it out. If any one knows a package or library that does this, please let me know. Plan B is to mock one using UIButtons, and here is where I'm having problems. Basically, when I press a button that should push a new view, it calls the push method, but I still see the top view. in the app delegate, I have something like: AppViewController *viewController; App1ViewController *app1ViewController; UINavigationController *navController; and in didFinishLaunching method, something like: viewController = [ [ AppViewController alloc ] initWithAppDelegate: self ]; app1ViewController = [ [App1ViewController alloc ] initWithAppDelegate: self ]; navController = [ [ UINavigationController alloc ] initWithRootViewController:viewController]; [window addSubview:viewController.view]; and 2 methods -(void)app1{[ navController pushViewController: app1ViewController animated:YES ];} -(void)back{[ navController popViewControllerAnimated:YES ];} then I have 2 viewcontrollers in AppViewController.h @interface AppViewController : UIViewController { UINavigationController *navController; UIButton *appbtn1, *appbtn2, *appbtn3, *appbtn4; } -(id)initWithAppDelegate:(id)appDelegate; @end @interface App1ViewController : UIViewController { UITextView *textView; UINavigationController *navController; } -(id)initWithAppDelegate:(id)appDelegate; @end and define a loadView for each viewcontroller. However, when I press the app1 button and the app1 method gets called, it says the view hasa been pushed, but my view remains the buttons view, i.e. the root view. If I press the button again, it tells me I can't repush the app1view, the one I can't see. Any ideas? I can post the full code if that helps. Thank you for your time.

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  • Loading animation Memory leak

    - by Ayaz Alavi
    Hi, I have written network class that is managing all network calls for my application. There are two methods showLoadingAnimationView and hideLoadingAnimationView that will show UIActivityIndicatorView in a view over my current viewcontroller with fade background. I am getting memory leaks somewhere on these two methods. Here is the code -(void)showLoadingAnimationView { textmeAppDelegate *textme = (textmeAppDelegate *)[[UIApplication sharedApplication] delegate]; [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:YES]; if(wrapperLoading != nil) { [wrapperLoading release]; } wrapperLoading = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 480.0)]; wrapperLoading.backgroundColor = [UIColor clearColor]; wrapperLoading.alpha = 0.8; UIView *_loadingBG = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 480.0)]; _loadingBG.backgroundColor = [UIColor blackColor]; _loadingBG.alpha = 0.4; circlingWheel = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge]; CGRect wheelFrame = circlingWheel.frame; circlingWheel.frame = CGRectMake(((320.0 - wheelFrame.size.width) / 2.0), ((480.0 - wheelFrame.size.height) / 2.0), wheelFrame.size.width, wheelFrame.size.height); [wrapperLoading addSubview:_loadingBG]; [wrapperLoading addSubview:circlingWheel]; [circlingWheel startAnimating]; [textme.window addSubview:wrapperLoading]; [_loadingBG release]; [circlingWheel release]; } -(void)hideLoadingAnimationView { [[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO]; wrapperLoading.alpha = 0.0; [self.wrapperLoading removeFromSuperview]; //[NSTimer scheduledTimerWithTimeInterval:0.8 target:wrapperLoading selector:@selector(removeFromSuperview) userInfo:nil repeats:NO]; } Here is how I am calling these two methods [NSThread detachNewThreadSelector:@selector(showLoadingAnimationView) toTarget:self withObject:nil]; and then somewhere later in the code i am using following function call to hide animation. [self hideLoadingAnimationView]; I am getting memory leaks when I call showLoadingAnimationView function. Anything wrong in the code or is there any better technique to show loading animation when we do network calls?

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