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  • Play sound when UIScrollView is scrolling

    - by Chonch
    Hey, I have a scroll view that can be scrolled to the sides (only left and right, not up and down). I want to play a short sound (less than a second) whenever the scroll view is moved X pixels to either side. How can this be done? Code samples will be greatly appreciated... Thanks,

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  • Properly maintain sorted state of Array/Set

    - by Jeff
    I'm trying to get data out of my MOC and then create some new objects based on those objects, and put it all back together, while keeping my sort state. The securities come out of the MOC in proper order. And everything seems to be fine until I do the assignment to the game at the bottom from setWithArray. The documentation says that setWithArray removed the duplicate objects, if there are any. I'm wonder if that's messing up my data, but I don't see a good alternative. The data is ultimately being pulled out into a UITableView. When I add items to the game manually, then they stay sorted, so I don't think the breaking of the sort is beyond the scope of what I've included here. NSError *error; NSArray *allTheSecurities = [managedObjectContext executeFetchRequest:request error:&error]; if (allTheSecurities == nil) { // Handle the error. } [request release]; /**/ NSLog( @"Enumerate..." ); NSEnumerator *enumerator = [allTheSecurities objectEnumerator]; id anObject; NSMutableArray *portfolioStocks = [[NSMutableArray alloc] init]; while (anObject = [enumerator nextObject]) { NSLog( @"Iteration... %@", [anObject name] ); NSLog( @"Build a stock..." ); PortfolioStocks *this_stock = (PortfolioStocks *)[NSEntityDescription insertNewObjectForEntityForName:@"PortfolioStocks" inManagedObjectContext:context]; NSLog( @"Set a value..." ); [this_stock setSecurity:(Security *)anObject]; [this_stock setQuantity:[NSNumber numberWithInt:0]]; NSLog( @"Add to portfolioStocks..." ); [portfolioStocks addObject:this_stock]; } //Sorted properly up to here! NSLog( @"Add to portfolio..." ); [game setPortfolio:[NSSet setWithArray:portfolioStocks]]; // <-- This is where it's not sorted anymore.

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  • capture image tag from multiple images

    - by Ruthy
    Hello, I have a .xib file containing 30 images and each image has a unique tag. How could I capture this tag in order to know which image has been touched when (void)touchesEnded??? How to define that images, on an array? Thanks for any idea to solve it!!

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  • Can't access annotation property of subclassed uibutton - editted

    - by Tzur Gazit
    Below is my original question. I kept investigating and found out that the type of the button I allocate is of type UIButton instead of the subclassed type CustomButton. the capture below is the allocation of the button and connection to target. I break immediately after the allocation and check the button type (po rightButton at the debugger console). It's turned out tht the type is UIButton instead of CustomButton. CustomButton* rightButton = [CustomButton buttonWithType:UIButtonTypeDetailDisclosure]; [rightButton addTarget:self action:@selector(showDetails:) forControlEvents:UIControlEventTouchUpInside]; I have a mapView to which I add annotations. The pin's callout have a button (rightCalloutAccessoryView). In order to be able to display various information when the button is pushed, i've subclassed uibutton and added a class called "Annotation". @interface CustomButton : UIButton { NSIndexPath *indexPath; Annotation *mAnnotation; } @property (nonatomic, retain) NSIndexPath *indexPath; @property (nonatomic, copy) Annotation *mAnnotation; - (id) setAnnotation2:(Annotation *)annotation; @end Here is "Annotation": @interface Annotation : NSObject <MKAnnotation> { CLLocationCoordinate2D coordinate; NSString *mPhotoID; NSString *mPhotoUrl; NSString *mPhotoName; NSString *mOwner; NSString *mAddress; } @property (nonatomic, assign) CLLocationCoordinate2D coordinate; @property (nonatomic, copy) NSString *mPhotoID; @property (nonatomic, copy) NSString *mPhotoUrl; @property (nonatomic, copy) NSString *mPhotoName; @property (nonatomic, copy) NSString *mOwner; @property (nonatomic, copy) NSString *mAddress; - (id) initWithCoordinates:(CLLocationCoordinate2D)coordinate; - (id) setPhotoId:(NSString *)id url:(NSString *)url owner:(NSString *)owner address:(NSString *)address andName:(NSString *)name; @end I want to set the annotation property of the uibutton at - (MKAnnotationView *)mapView:(MKMapView *)pMapView viewForAnnotation:(id )annotation, in order to refer to it at the button push handler (-(IBAction) showDetails:(id)sender). The problem is that I can't set the annotation property of the button. I get the following message at run time: 2010-04-27 08:15:11.781 HotLocations[487:207] *** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400 2010-04-27 08:15:11.781 HotLocations[487:207] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[UIButton setMAnnotation:]: unrecognized selector sent to instance 0x5063400' 2010-04-27 08:15:11.781 HotLocations[487:207] Stack: ( 32080987, 2472563977, 32462907, 32032374, 31884994, 55885, 30695992, 30679095, 30662137, 30514190, 30553882, 30481385, 30479684, 30496027, 30588515, 63333386, 31865536, 31861832, 40171029, 40171226, 2846639 ) I appreciate the help. Tzur.

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  • Corrupted image if variable is not static

    - by Jaka Jancar
    I'm doing the following: static GLfloat vertices[3][3] = { {0.0, 1.0, 0.0}, {1.0, 0.0, 0.0}, {-1.0, 0.0, 0.0} }; glColor4ub(255, 0, 0, 255); glEnableClientState(GL_VERTEX_ARRAY); glVertexPointer(3, GL_FLOAT, 0, vertices); glDrawArrays(GL_TRIANGLES, 0, 9); glDisableClientState(GL_VERTEX_ARRAY); This works ok: However, if I remove static from vertices and therefore re-create the data on the stack on each rendering, I get the following: This happens both on the simulator and on the device. Should I be keeping the variables around after I call glDrawArrays?

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  • Fetch Data using predicate. Retrieve single value.

    - by Mr. McPepperNuts
    XYZAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate]; NSManagedObjectContext *managedObjectContext = appDelegate.managedObjectContext; NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSPredicate *predicate = [NSPredicate predicateWithFormat:@"name == %@", entryToSearchFor]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Entry" inManagedObjectContext:managedObjectContext]; NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"name" ascending:NO]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [request setSortDescriptors:sortDescriptors]; [request setEntity: entity]; [request setPredicate: predicate]; NSArray *results = [managedObjectContext executeFetchRequest:request error:nil]; if (results == nil) { NSLog(@"No results found"); }else { NSLog(@"entryToSearchFor %@", entryToSearchFor); NSLog(@"results %@", [results objectAtIndex:0]); } I want to retrieve a single value (String) from "Entry." I believe I must be missing. Can someone point it out? Btw, the NSLog results outputs the following: results <NSManagedObject: 0x3d2d360> (entity: Entry; id: 0x3d13650 <x-coredata://6EA12ADA-8C0B-477F-801C-B44FE6E6C91C/Entry/p3> ; data: <fault>)

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  • Combine Search Bar and URL Bar into One (WebView)

    - by Jay Bush
    So I'm in the midst of updating my Web Browser app for iOS devices, from the ground up, and I'm trying to implement some more convenient features. One feature that seems to be really popular now, that I have been getting a lot of requests for, is the combination of a Google Search bar and a URL bar in one, like that of the Chrome application. Below is a screenshot of the Google Chrome app, and as you can see, they've made it so you can either enter in a search query like "apple ipad" and it will return a Google search page of 'Apple iPad', or you can enter in a URL "http://apple.com/ipad/" and it will load that URL. I have looked all over the internet, but all I could find were tutorials on how to Search Google with value of the UITextField. I have a feeling that the best way to do this is to probably make a 'check'. Like if the entered value contains 'http://' 'www.' '.com' or no spaces, then load it as a URL, if not then load it in a Google Search page, and then have the webview load up the Google Search page. If anybody could show me to the right direction, that would be great, or even supplying me with some code would be even greater. :) Thanks! If anyone needs part of the code, just ask.

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  • Changing Tint / Background color of UITabBar

    - by pixel
    The UINavigationBar and UISearchBar both have a tintColor property that allows you to change the tint color (surprising, I know) of both of those items. I want to do the same thing to the UITabBar in my application, but have found now way to change it from the default black color. Any ideas?

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  • Nested Views-button aint clicking

    - by Deepika
    i have a view which has a datepicker and a button added to it. There is another view which adds the above view as subview. But the events like touchesBegan and button's action are not being clicked on the subview. Please help The code of the parent view is: iTagDatePicker *dt=[[iTagDatePicker alloc] initWithFrame:CGRectMake(0.0, 180.0, 320.0, 240.0)]; //dt.userInteractionEnabled=YES; //[dt becomeFirstResponder]; dt.backgroundColor=[UIColor clearColor]; [UIView beginAnimations:@"animation" context:nil]; [UIView setAnimationDuration:1.0]; CGPoint cntr; cntr.x=160.0; cntr.y=420.0; dt.center=cntr; [self.view addSubview:dt]; self.view.userInteractionEnabled=YES; CGPoint cntr1; cntr1.x=160.0; cntr1.y=158.0; dt.center=cntr1; [UIView commitAnimations]; [dt release]; and the code for the sub class is: - (id)initWithFrame:(CGRect)frame { if (self = [super initWithFrame:frame]) { dtPicker=[[UIDatePicker alloc] initWithFrame:CGRectMake(frame.origin.x, frame.origin.y, 320.0, 216.0)]; dtPicker.datePickerMode=UIDatePickerModeDate; dtPicker.date=[NSDate date]; [self addSubview:dtPicker]; btn=[[UIButton buttonWithType:UIButtonTypeDetailDisclosure]retain]; btn.frame=CGRectMake(110.0, 400.0, 100.0, 20.0); [btn setTitle:@"Done" forState:UIControlStateNormal]; btn.userInteractionEnabled=YES; [btn becomeFirstResponder]; [btn addTarget:self action:@selector(SelectedVal:) forControlEvents:UIControlEventTouchDown]; [self addSubview:btn]; } return self; } The button is not working

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  • How to add a leftBarButtonItem to ABPeoplePickerNavigationController?

    - by al_lea
    Tried this, but doesn't work: ABPeoplePickerNavigationController * people_picker = [[ABPeoplePickerNavigationController alloc] init]; people_picker.peoplePickerDelegate = self; self.navigationController.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle: @"send" style: self.navigationController.navigationItem.rightBarButtonItem.style target: self action: @selector(cancelAddressBook)] autorelease]; [self.navigationController presentModalViewController: people_picker animated: YES];

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  • UITableView cell animate background

    - by psychotik
    I have a UITableView with a bunch of rows. When some action occurs, I want to animate the background of a cell. I just want to make it grey and then fade it back to the default in .5 seconds. Is my only option to set the background and call [tableView beginUpdates] followed by [tableView endUpdates] and then set a timer to clear the background again, or is there some more fundamental animation technique I can use here?

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  • data not reloading into tableview from core data on minor update

    - by Martin KS
    I've got a basic photo album application, on the first view a list of albums is displayed with a subtitle showing how many images are in each album. I've got everything working to add albums, and add images to albums. The problem is that the image count lines are accurate whenever the app loads, but I can't get them to update during execution. The following viewdidload correctly populates all lines of the tableview when the app loads: - (void)viewDidLoad { [super viewDidLoad]; // Set the title. self.title = @"Photo albums"; // Configure the add and edit buttons. self.navigationItem.leftBarButtonItem = self.editButtonItem; addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addAlbum)]; addButton.enabled = YES; self.navigationItem.rightBarButtonItem = addButton; /* Fetch existing albums. Create a fetch request; find the Album entity and assign it to the request; add a sort descriptor; then execute the fetch. */ NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Album" inManagedObjectContext:managedObjectContext]; [request setEntity:entity]; // Order the albums by name. NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"albumName" ascending:NO]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [request setSortDescriptors:sortDescriptors]; [sortDescriptor release]; [sortDescriptors release]; // Execute the fetch -- create a mutable copy of the result. NSError *error = nil; NSMutableArray *mutableFetchResults = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy]; if (mutableFetchResults == nil) { // Handle the error. } LocationsAppDelegate *mainDelegate = (LocationsAppDelegate *)[[UIApplication sharedApplication] delegate]; // Set master albums array to the mutable array, then clean up. [mainDelegate setAlbumsArray:mutableFetchResults]; [mutableFetchResults release]; [request release]; } But when I run similar code inside viewdidappear, nothing happens: { /* Fetch existing albums. Create a fetch request; find the Album entity and assign it to the request; add a sort descriptor; then execute the fetch. */ NSFetchRequest *request = [[NSFetchRequest alloc] init]; NSEntityDescription *entity = [NSEntityDescription entityForName:@"Album" inManagedObjectContext:managedObjectContext]; [request setEntity:entity]; // Order the albums by creation date, most recent first. NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"albumName" ascending:NO]; NSArray *sortDescriptors = [[NSArray alloc] initWithObjects:sortDescriptor, nil]; [request setSortDescriptors:sortDescriptors]; [sortDescriptor release]; [sortDescriptors release]; // Execute the fetch -- create a mutable copy of the result. NSError *error = nil; NSMutableArray *mutableFetchResults = [[managedObjectContext executeFetchRequest:request error:&error] mutableCopy]; if (mutableFetchResults == nil) { // Handle the error. } LocationsAppDelegate *mainDelegate = (LocationsAppDelegate *)[[UIApplication sharedApplication] delegate]; // Set master albums array to the mutable array, then clean up. [mainDelegate setAlbumsArray:mutableFetchResults]; [self.tableView reloadData]; [mutableFetchResults release]; [request release]; } Apologies if I've missed the answer to this question elsewhere, but what am I missing?

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  • Get unique artist names from MPMediaQuery

    - by Akash Malhotra
    I am using MPMediaQuery to get all artists from library. Its returning unique names I guess but the problem is I have artists in my library like "Alice In Chains" and "Alice In Chains ". The second "Alice In Chains" has some white spaces at the end, so it returns both. I dont want that. Heres the code... MPMediaQuery *query=[MPMediaQuery artistsQuery]; NSArray *artists=[query collections]; artistNames=[[NSMutableArray alloc]init]; for(MPMediaItemCollection *collection in artists) { MPMediaItem *item=[collection representativeItem]; [artistNames addObject:[item valueForProperty:MPMediaItemPropertyArtist]]; } uniqueNames=[[NSMutableArray alloc]init]; for(id object in artistNames) { if(![uniqueNames containsObject:object]) { [uniqueNames addObject:object]; } } Any ideas?

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  • asynchronous method executing

    - by alexeyndru
    I have a delegate method with the following tasks: get something from the internet (ex: some image from a web site); process that image in a certain way; display the result in a subview ; getting the image takes some time, depending on the network's speed so the result of its processing is displayed in the subview after that little while. my problem: during the time between getting the image and showing the result the device looks unresponsive. any attempt to put some spinner, or any other method which is called inside this main procedure has no effect until the result is processed. how should I change this behaviour? I would like to put a big spinner during that waiting time. thank you.

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  • Which pdf elements could cause crashes?

    - by Felixyz
    This is a very general question but it's based on a specific problem. I've created a pdf reader app for the iPad and it works fine except for certain pdf pages which always crash the app. We now found out that the very same pages cause Safari to crash as well, so as I had started to suspect the problem is somewhere in Apple's pdf rendering code. From what I have been able to see, the crashing pages cause the rendering libraries to start allocating memory like mad until the app is killed. I have nothing else to help me pinpoint what triggers this process. It doesn't necessarily happen with the largest documents, or the ones with the most shapes. In fact, we haven't found any parameter that helps us predict which pages will crash and which not. Now we just discovered that running the pages through a consumer program that lets you merge docs gets rid of the problem, but I haven't been able to detect which attribute or element it is that is the key. Changing documents by hand is also not an option for us in the long run. We need to run an automated process on our server. I'm hoping someone with deeper knowledge about the pdf file format would be able to point me in a reasonable direction to look for document features that could cause this kind of behavior. All I've found so far is something about JBIG2 images, and I don't think we have any of those.

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  • iOS Facebook SDK: FBRequestDelegate only works on AppDelegate??

    - by RMR
    Hi guys, I want to encapsulate all my Facebook interactions within a FacebookFacade class to keep things clean and tidy. I have an instance of the iOS SDK Facebook class within my FacebookFacade. My problem is that when I make a Graph API call within the facade, such as: [self.facebook requestWithGraphPath:@"me" andDelegate:self]; the only method of FBRequestDelegate that gets called is requestLoading: and nothing else. I have tried putting similar code in other places, like in controllers and other models, and there too not all of the FBRequestDelegate methods get called, only requestLoading:. In fact the only way I can get the other FBRequestDelegate methods to be called is to put all my Facebook logic in the AppDelegate and make my AppDelegate the FBRequestDelegate. Why is this the case? Am I missing something here? I definitely do not want to use the AppDelegate as my FBRequestDelegate as I don't want to confuse the purpose of the AppDelegate. Thanks.

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  • Question about select UITableViewCell fields

    - by Joaquin McCoy
    Hi guys, I've a custom UITableViewCell like this: +--------------------------+ | username | | | | --- <image> -- | | | | <like it> | +--------------------------+ It display an username, an image and a button "Like it" to like image. I don't want that the entire cell is selectable, I want a user can tap on "username" to see a new view that show username information. The same for image, when user tap on image, he could see the image in a new view. Now I can only select my entire cell. How can I implement something like this? Thanks. When you click on the username you'll see a view for user information. The entire cell is not selectable.

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  • What alternatives do I have for source control and does GIT does that?

    - by RubberDuck
    I work as a freelancer programmer for some clients and also create apps for myself. When I work for myself, obviously I work alone. I generally don't work in a linear way. My big problems today are: I have a lot of apps that use the same classes I have developed; In the past, I put all these common classes on a directory outside all projects and included them on my apps using absolute paths, but this method sucks because by accident (if you forget) you may change a path or the disk and all projects are broken. Then I decided to copy those classes to my projects every time. Because the majority of these classes do not change frequently, I am relatively ok, but when they change, I am in hell; When I change one of these classes I have to propagate the changes to all other apps using copies of them. I have also tried to create frameworks but thanks to Apple, I cannot create frameworks for iOS and have to create libraries and bundles and create a nightmare of paths from one to the other and to the project to make that sh!t works. So, I am done with frameworks/libraries on Xcode until Xcode is a decent IDE. So, I see I need something better to manage my source code. What I need is this (I never used GIT on Xcode. I have read Apple docs but I still have these points): does git locally on Xcode allows me to deal with assets or just code? Can I have the equivalent of a "framework" (code + assets) managed by git locally? Can an entire xcodeproj be managed as a unity? I mean, Suppose I have a xcodeproj created and want GIT to manage it. How do I enable git on a project that was created without it and start designating files for management. (I have enabled git on Xcode's preferences, but all source control menu is grayed out). Is git the best option? Do I have another? Remember that my main condition is that the files should stay on the local computer. Please save me (I am a bit dramatic today). Thanks.

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