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  • Where to #include?

    - by fuzzygoat
    In my past applications I have been #importing into my *.h files where needed. I have not really thought much about this before as I have not had any problems, but today I spotted something that got me to thinking that maybe I should be #import-ing into my .m files and using @class where needed in the headers (.h) Can anyone shine any light on the way its supposed to be done or best practice? gary

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  • Writing multiple NSData to File

    - by user326943
    I need a hint on how to write multiple NSData chunks to single file. Downloading a file using NSURLConnection in chunks. Each chunk is downloaded in a separate NSOperation thread. As the chunks finish downloading they need to be written to a file so combined result is the file downloaded. What would be the best way to manage the NSData that is returned and writing it to a single file?

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  • Why does addSubview load the view asynchronously

    - by moshe
    I have a UIView that I want to load when the user clicks a button. There happens to be some data processing that happens as well after I call addSubview that involves parsing an XML file retrieved from the web. The problem is the view doesn't show up until after the data processing even if addSuview is called first. I think I'm missing something here, can anyone help? Code: I have a "Loading..." view I'm adding as a custom modal (meaning I'm not using the modalViewController). This action is linked to a button in the navigationController. - (IBAction)parseXml:(id)sender { LoadingModalViewController *loadingModal = [[LoadingModalViewController alloc] initWithNibName:@"LoadingModalViewController" bundle:nil]; [navigationController.view addSubview:loadingModal.view]; [xmlParser parse]; }

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  • Setting Position of NSWindow before Display

    - by Armin Ronacher
    Right now I'm setting the position of a window that is about to open like this: -(void) setActiveNodeDialog:(ISKNodeDialogController *)dialog { if (activeNodeDialog) [[activeNodeDialog window] close]; activeNodeDialog = dialog; if (activeNodeDialog) { [activeNodeDialog setMainWindowController:self]; NSRect windowRect = [[self window] frame]; NSRect dialogRect = [[activeNodeDialog window] frame]; NSPoint pos; pos.x = windowRect.origin.x + windowRect.size.width - dialogRect.size.width - 10; pos.y = windowRect.origin.y + 32; [[activeNodeDialog window] setFrameOrigin:pos]; [[activeNodeDialog window] makeKeyAndOrderFront:nil]; } } The problem with that is, that the window will "jump" when shown. And that even though I set the position before showing the window with "makeKeyAndOrderFront". The window is a NSPanel *. Anyone any ideas how to fix the jumping? Setting the position in awakeFromNib is not an option because the main controller is set later.

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  • Managing NSStoreType changes between debug and release builds

    - by Eimantas
    NSXMLTypeStore is used when starting Core Data backed application by default because it's good for debugging purposes. But practice dictates that developer should use either NSBinaryStoreType, NSInMemoryStoreType or NSSQLiteStoreType store types in release builds. How do you manage changes between debug and release builds? I believe that changing store type from NSXMLTypeStore to, say, NSBinaryStoreType in code on each release is kinda cumbersome.

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  • Why is my UITableView not being set?

    - by Jamie L
    I checked using the debbuger in the viewDidLoad method and tracerTableView is 0x0 which i assume means it is nil. I don't understand. I should go ahaed say yes I have already checked my nib file and yes all the connections are correct. Here is the header file and the begging of the .m. ///////////// .h file //////////// @interface TrackerListController : UITableViewController { // The mutable (modifiable) dictionary days holds all the data for the days tab NSMutableArray *trackerList; UITableView *tracerTableView; } @property (nonatomic, retain) NSMutableArray *trackerList; @property (nonatomic, retain) IBOutlet UITableView. *tracerTableView; //The addPackage: method is invoked when the user taps the addbutton created at runtime. -(void) addPackage : (id) sender; @end /////////////////////////////////////////////////////////////////////////////////////////////////// ////////////////////////////////////// .m file ////////////////////////////////////// @implementation TrackerListController @synthesize trackerList, tracerTableView; (void)viewDidLoad { [super viewDidLoad]; self.title = @"Package Tracker"; self.navigationItem.leftBarButtonItem = self.editButtonItem; UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addPackage:)]; // Set up the Add custom button on the right of the navigation bar self.navigationItem.rightBarButtonItem = addButton; [addButton release]; // Release the addButton from memory since it is no longer needed }

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  • Multiple labels in Navigation bar

    - by cmos
    I would like to create a view similar to the "Now Playing" page on the iPhone and have 3 lines of text in the Navigation bar. The only way I could find to do this was: UINavigationBar *bar = [self.navigationController navigationBar]; label = [[UILabel alloc] initWithFrame:CGRectMake(60, 2, 200, 14)]; label.tag = SONG_TAG; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont boldSystemFontOfSize:14]; label.adjustsFontSizeToFitWidth = NO; label.textAlignment = UITextAlignmentCenter; label.textColor = [UIColor whiteColor]; label.highlightedTextColor = [UIColor blackColor]; [bar addSubview:label]; [label release]; //Create album label label = [[UILabel alloc] initWithFrame:CGRectMake(60, 17, 200, 12)]; label.tag = ALBUM_TAG; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont systemFontOfSize:12]; label.adjustsFontSizeToFitWidth = NO; label.textAlignment = UITextAlignmentCenter; label.highlightedTextColor = [UIColor blackColor]; label.textColor = HEXCOLOR(0xA5A5A5ff); [bar addSubview:label]; [label release]; //Create artist label label = [[UILabel alloc] initWithFrame:CGRectMake(60, 30, 200, 12)]; label.tag = ARTIST_TAG; label.backgroundColor = [UIColor clearColor]; label.font = [UIFont systemFontOfSize:12]; label.adjustsFontSizeToFitWidth = NO; label.textAlignment = UITextAlignmentCenter; label.highlightedTextColor = [UIColor blackColor]; label.textColor = HEXCOLOR(0xA5A5A5ff); [bar addSubview:label]; [label release]; The problem with this is I have to remove them when the view changes. So, in -viewWillDisappear I have: UILabel *label; label = (UILabel *)[self.navigationController.navigationBar viewWithTag:SONG_TAG]; [label removeFromSuperview]; label = (UILabel *)[self.navigationController.navigationBar viewWithTag:ALBUM_TAG]; [label removeFromSuperview]; label = (UILabel *)[self.navigationController.navigationBar viewWithTag:ARTIST_TAG]; [label removeFromSuperview]; I think the way to do this is make a custom view that has the 3 labels in it, and add this to the title view. (here's the catch - you can only add 1 label or view to the title view spot on the nav bar) self.navigationItem.titleView = newViewIMadeWithThreeLabels

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  • How do I use AFAssistantPane?

    - by Koning Baard
    I have searched my entire Mac for ibplugin to find the QTKit IBPlugin, but I also came accros a plugin which adds AFAssistantPane to IB. I did a Google-search but Google has no results for it. So, does anyone know how I can use this AFAssistantPane? Thanks Update: I noted that this is in a private framework (that's why it is not documented).

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  • Common NSNotification mistakes?

    - by Ben Packard
    A simplification... A building has an array of apartment objects. Each apartment has a single currentTenant. These tenants are of type Person. Note that currentTenant doesn't have a reference to the apartment, so can't send information back up the chain. When a tenant has a plumbing issue he raises an NSNotification: [nc postNotificationName:@"PlumbingIssue" object:self]; Each Apartment observes notifications ONLY FROM it's own current tenant (this is set up when the apartment is built, before there is a current tenant): [nc addObserver:self selector:@selector(alertBuildingManager:) name:@"PlumbingIssue" object:[self currentTenant]; When the apartment receives a notification from it's own currentTenant, it sends it's own notification, "PlumberRequired", along with the apartment number and the currentTenant in an NSDictionary. Apartment observes these notifications, which it will take from any apartment (or other object): [nc addObserver:self selector:@selector(callPlumber) name:@"PlumberRequired" object:nil]; Is there something I could be getting fundamentally wrong here? What's happening is that the apartment is receiving notifications from any and all currentTenants, rather than jus it's own. Sorry that the actual code is a bit too unwieldy to post. Was just wondering if there's a gap in my understanding about observing notifications from a particular sender?

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  • [iphone] UIControlEventTouchDragEnter doesn't seem to work for catching a tap that slides into a con

    - by mahboudz
    I wanted to allow for a method to get called, if a finger was dragged from outside into the bounds of a control. I thought UIControlEventTouchDragEnter would do it, but it doesn't seem to. Does anyone know if there is a way to trigger an action based on a tap sliding into a control? This is what I was trying, but got no calls to my -fingerSlidIn: [aButton addTarget:self action:@selector(fingerSlidIn:withEvent: ) forControlEvents: UIControlEventTouchDragEnter]; Thanks!

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  • UIActionSheet cancel button strange behaviour

    - by nevan
    I have a UIBarButtonItem opening an action sheet to offer users choices about what to do. Everything works as expected unless I try to click on the "Cancel" button. The target of the button appears to have moved up from where it should be. I can only activate it by clicking somewhere in the middle of the "Cancel" and "Ok" buttons. I've tried at action sheets in other applications and they work fine, so it's not just my big thumb. The action sheet is opening in a UIViewController - (void)showOpenOptions { UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:NSLocalizedString(@"Open link in external application?", @"Open in external application") delegate:self cancelButtonTitle:NSLocalizedString(@"Cancel", @"Cancel") destructiveButtonTitle:NSLocalizedString(@"Open Link", @"Open Link") otherButtonTitles:nil]; [sheet showInView:self.view]; [sheet release]; }

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  • Memory management with Objective-C Distributed Objects: my temporary instances live forever!

    - by jkp
    I'm playing with Objective-C Distributed Objects and I'm having some problems understanding how memory management works under the system. The example given below illustrates my problem: Protocol.h #import <Foundation/Foundation.h> @protocol DOServer - (byref id)createTarget; @end Server.m #import <Foundation/Foundation.h> #import "Protocol.h" @interface DOTarget : NSObject @end @interface DOServer : NSObject < DOServer > @end @implementation DOTarget - (id)init { if ((self = [super init])) { NSLog(@"Target created"); } return self; } - (void)dealloc { NSLog(@"Target destroyed"); [super dealloc]; } @end @implementation DOServer - (byref id)createTarget { return [[[DOTarget alloc] init] autorelease]; } @end int main() { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; DOServer *server = [[DOServer alloc] init]; NSConnection *connection = [[NSConnection new] autorelease]; [connection setRootObject:server]; if ([connection registerName:@"test-server"] == NO) { NSLog(@"Failed to vend server object"); } else [[NSRunLoop currentRunLoop] run]; [pool drain]; return 0; } Client.m #import <Foundation/Foundation.h> #import "Protocol.h" int main() { unsigned i = 0; for (; i < 3; i ++) { NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init]; id server = [NSConnection rootProxyForConnectionWithRegisteredName:@"test-server" host:nil]; [server setProtocolForProxy:@protocol(DOServer)]; NSLog(@"Created target: %@", [server createTarget]); [[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:1.0]]; [pool drain]; } return 0; } The issue is that any remote objects created by the root proxy are not released when their proxy counterparts in the client go out of scope. According to the documentation: When an object’s remote proxy is deallocated, a message is sent back to the receiver to notify it that the local object is no longer shared over the connection. I would therefore expect that as each DOTarget goes out of scope (each time around the loop) it's remote counterpart would be dellocated, since there is no other reference to it being held on the remote side of the connection. In reality this does not happen: the temporary objects are only deallocate when the client application quits, or more accurately, when the connection is invalidated. I can force the temporary objects on the remote side to be deallocated by explicitly invalidating the NSConnection object I'm using each time around the loop and creating a new one but somehow this just feels wrong. Is this the correct behaviour from DO? Should all temporary objects live as long as the connection that created them? Are connections therefore to be treated as temporary objects which should be opened and closed with each series of requests against the server? Any insights would be appreciated.

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  • Dump UIImage on iPhone

    - by Leon
    I wonder how to save the UIImage object from UIImagePickerController into the App Document directory. I tried to use UIImageJPEGRepresentation() method and UIImagePNGRepresentation(), but it seemed the image data was changed. Is there any method to keep the original image content without any compression?

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  • IPhone memory problems...

    - by jAmi
    Hi, I am working on an App that is already been made but Memory Management was not considered in the development stages. So what can I do to keep the App memory usage low as soon as I get a memory warning? Is there any general tool or some piece of code that I can use to release any unused memory?

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  • How does this "&" work in this statement?

    - by aquaibm
    I know how bitwise AND works,but I don't understand how does (sourceDragMask & NSDragOperationGeneric) work here,I don't get the point.Is there anyone can explain to me?Thanks a lot. (NSDragOperation)draggingEntered:(id )sender { NSPasteboard *pboard; NSDragOperation sourceDragMask; sourceDragMask = [sender draggingSourceOperationMask]; pboard = [sender draggingPasteboard]; if ( [[pboard types] containsObject:NSColorPboardType] ) { if (sourceDragMask & NSDragOperationGeneric) { return NSDragOperationGeneric; } } return NSDragOperationNone; }

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  • UITableView setting standalone delegate object?

    - by fuzzygoat
    Hi have setup a sample application using a UITableView. Initially I did this by conforming my controller to and , added a tableView in IB and connected "datasource" & "delegate" to Files Owner. It all works so thats good. What I have been trying out is creating my own class for the delegate. I created a new class and added and , but quickly found I could not connect the tableViewdataSource / delegate. To solve this I added an "Object" (NSObject) in IB and set it to my new class. I then connected the dataSource and delegate outlets to this object. It sort of works, the app runs and displays the tableView, but when I try and scroll the table the app crashes. Can I ask if I am going about this the right way? gary

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  • UIScrollView loading an image

    - by treasure
    i must say i m not very good at this. and you probably know that (cause noone bothers to answer my questions) but i will keep on trying!!! lol here it goes! i wanted to find an "easy" way to use the pinch/zoom function on my app! so i decided to use a UIScrollView. so far so good. i load my image from an sqlite db like so: - (void)loadView { self.title = @"ScrollView"; imageView = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame]; imageView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth; imageView.contentMode = UIViewContentModeScaleAspectFit; imageView.backgroundColor = [UIColor blackColor]; self.view = imageView;} and - (void)viewWillAppear:(BOOL)animated {imageView.image = entity.imageA} I followed a tutorial but i cnnot seem to be able to load my image at all: - (void)vieDidLoad { imageView = [[UIImageView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame]; imageView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth; imageView.contentMode = UIViewContentModeScaleAspectFit; imageView.backgroundColor = [UIColor blackColor]; //when i have this it does load the image but when i cant load my own data!! /*UIImageView *tempImageView = [[UIImageView alloc] initWithImage:[UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://www.austinbull.com/clonemines.png"]]]]; [self setMyImage:tempImageView]; [tempImageView release];*/ myScrollView.contentSize = CGSizeMake(imageView.frame.size.width, imageView.frame.size.height); myScrollView.maximumZoomScale = 4.0; myScrollView.minimumZoomScale = 0.75; myScrollView.clipsToBounds = YES; myScrollView.delegate = self; [myScrollView addSubview:imageView]; self.view = scrollView; [window makeKeyAndVisible]; } (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView { return myImage; } any help would be appreciated! thank you for your time!

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  • setting image of slider

    - by iSight
    Hi, How can i set an image to a circular slider, which is an object of NSSlider. I have called setImage: method, but does not work out. What could be the alternative approach to do so.

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  • What's a good way to create an Event Calendar

    - by iFloh
    Hi, I want to create an Event Calendar for my iPhone App. In a first instance the Event Calendar is supposed to list the Events and have a Details View with additional info. It is also supposed to contain an action to trasfer a specific event to the iPhone Calendar. First thoughts go towards using a UITableView where I make the event dates as sections. Since the Calendar is supposed to span many month I am unsure whether this really is the best way to go about it. Any suggestions? Do you probably know some sample code that I might use ? thanks in advance

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