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  • setDelegate:self, how does it work?

    - by fuzzygoat
    I have a query regarding how delegates work. My understanding was that delegates take responsibility for doing certain tasks on behalf of another object. locationManager = [[CLLocationManager alloc] init]; [locationManager setDelegate:self]; [locationManager setDistanceFilter:kCLDistanceFilterNone]; [locationManager setDesiredAccuracy:kCLLocationAccuracyBest]; [locationManager startUpdatingLocation]; Am I right in thinking that in the example code above that the instance of CLLocationManager is created on a new thread so that it can get on with trying to find the location information it needs. When it completes its task (or encounters an error) it calls-back using the appropriate methods located in self e.g. locationManager:didUpdateToLocation:fromLocation: Essentially locationManager sends messages to self (which conforms to the correct delegate protocol) when things happen cheers gary

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  • MVC - Calling Controller Methods

    - by JT703
    Hello, My application is following the MVC design pattern. The problem I keep running into is needing to call methods inside a Controller class from outside that Controller class (ex. A View class wants to call a Controller method, or a Manager class wants to call a Controller method). Is calling Controller methods in this way allowed in MVC? If it's allowed, what's the proper way to do it? According to the version of MVC that I am following (there seems to be so many different versions out there), the View knows of the Model, and the Controller knows of the View. Doing it this way, I can't access the controller. Here's the best site I've found and the one describing the version of MVC I'm following: http://leepoint.net/notes-java/GUI/structure/40mvc.html. The Main Program code block really shows how this works. Thanks for any answers.

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  • How can I work around "Xcode could not locate source file"

    - by Septih
    Hello, I'm working with the ID3 framework in Xcode (which has since disappeared off the face of the web - including google cache!). I'm testing out an import mp3 feature which allows them to edit the tags as they import them. One of the test cases is a corrupt or invalid mp3 with no proper id3 header. The problem I'm having is that when updating the tags of the invalid mp3 (updateFile:), the ID3 framework attempts to use id3V1Tag.m (I assume it falls back to this if it can't find the v2 tag) and this is where I get the Xcode error (whilst running the program, not building): Xcode could not locate source file: id3V1Tag.m (line: 299) Even in a release build this crashes the program, so it's not something I can really ignore. I've tried putting a try/catch block around it but it's not treated as an exception so doesn't get caught. The function to load the tag data for the file returns a BOOL but it appears this only returns false if the given file doesn't exist, so this doesn't help either. Current code: [tagData release]; tagData = [[TagAPI alloc] initWithGenreList:nil]; tagsLoaded = [tagData examineFile:exportPath]; if(tagsLoaded) { [tagData setTitle:title]; [tagData setArtist:artist]; [tagData setComments:comments]; @try { [tagData updateFile]; } @catch (id e){ NSLog(@"h"); } }

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  • NSButton blue highlight

    - by Remizorrr
    Hi. i want to make on/off gradient NSButton but with blue highlight like NSTabView select buttons. Is it possible to make this easy way? Or i should draw this manually? if i should draw this manually what is the best way to do this? (CIFilter or just NSGradient) thanks.

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  • Image "moves" when varying heightForRowAtIndexPath in UITableViewCell.

    - by Kalle
    I have a table view with varying height, as defined in the heightForRowAtIndexPath. For some very odd reason, the image is "indented" to the right based on the height; if the height is low enough, the image is stuck to the left side of the cell, but as the height increases, the image for said cell is shifted rightward compared to other rows. The result of this is a very poor looking list, with images floppily laid out in a zig-zag pattern depending on the height of each individual row. The problem is revealed by this simple example: - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return (indexPath.row+1) * 50; } Each cell is set up (simplified) as a "Subtitle" style cell with: // ... cell.textLabel.text = @"foo"; cell.detailTextLabel.text = @"bar"; cell.imageView.backgroundColor = [UIColor redColor]; // for debugging; i have images with transparent bg cell.imageView.image = anImageThatIs55x50pixelsBig; return cell; Any ideas? My head bleeds from the wall-love-affair. Edit: uploaded a screen which displays this. The "image" is just a screenshot of a tiny area of the screen which makes it look a little weird, but you get the picture I'm sure: http://img28.imageshack.us/img28/549/screenshot20100311at172.png

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  • NSInteger differences between CLI and GUI ?

    - by d11wtq
    I've been building a framework and writing unit tests in GHUnit. One of my Framework's accessor methods returns an NSInteger. I assert the expected value in the tests like this: GHAssertEquals(1320, request.port, @"Port number should be 1320"); When running my tests with an AppKit UI based frontend this assertion passes. However, when I run my tests on the command line, it fails with a type-mismatch unless I type-cast my hard-coded 1320 as (NSInteger). What's causing the difference in the way the integer is being interpreted by the compiler? Is xcodebuild on the command line using a different data-type for hard coded integers?

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  • UITextView insert text in the textview text

    - by John Smith
    I want to have to occasionally insert text into the UITextView text object. For example, if the user presses the "New Paragraph" button I would like to insert a double newline instead of just the standard single newline. How can I go about such? Do i have to read the string from UITextView, mutate it, and write it back? Then how would I know where the pointer was? Thanks

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  • TTNavigator doesn't use existing navigation bar (iPhone)

    - by user220770
    I am using the three20 framework in one view controller of my App. I create TTNavigator object and open a url which works fine. The problem is that TT creates it's own navigation bar and does not use the existing bar. There is no back button on the new nav bar so I cannot go back to my previous view controller. Has anybody run into this issue? Any ideas on how to fix (besides not using three20)? Thanks

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  • How to quickly search an array of objects in Objective-C

    - by randombits
    Is there a way in Objective-C to search an array of objects by the contained object's properties if the properties are of type string? For instance, I have an NSArray of Person objects. Person has two properties, NSString *firstName and NSString *lastName. What's the best way to search through the array to find everyone who matches 'Ken' anywhere in the firstName OR lastName properties?

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  • Undefined symbols for architecture armv7 using route-me

    - by Alex
    I'm trying to compile my project including route-me using armv7 although am struggling with the following error, i have older versions of the same project in git which compiles fine with armv7 so a setting must have changed somewhere to break it, here is the error: Undefined symbols for architecture armv7: "_pj_fwd", referenced from: -[RMProjection latLongToPoint:] in libMapView.a(RMProjection.o) "_pj_inv", referenced from: -[RMProjection pointToLatLong:] in libMapView.a(RMProjection.o) "_pj_init_plus", referenced from: -[RMProjection initWithString:InBounds:] in libMapView.a(RMProjection.o) "_pj_free", referenced from: -[RMProjection dealloc] in libMapView.a(RMProjection.o) ld: symbol(s) not found for architecture armv7 clang: error: linker command failed with exit code 1 (use -v to see invocation) Any help would be greatly appreciated.

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  • Using an NSButtonCell with template image in a NSTableView

    - by alloy
    In Interface Builder, I have set the dataCell of one of the columns of my NSTableView instance to be NSButtonCell. This works as expected, however, trying to use a ‘template’ image doesn't yield the expected visual result when clicking the button. How I configure the NSButtonCell: Image: NSRevealFreestandingTemplate Scaling: None Bezel: Bevel Type: Momentary Push In Bordered: false Expected result when clicking the button: Since the image is a ‘template’, the button should render its ‘on’ state. The background, ie the space surrounding the image, should not change. Actual result when clicking the button: No difference in the ‘state’ of the rendered image. The background color changes to white. Even-though I’ve tried my best to make the explanation of the problem as concise as possible, I’ve also made a simple screencast to visually illustrate the problem. And uploaded the demo app.

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  • Need help with animation on iPhone

    - by Arun Ravindran
    I'm working on an animated clock application for the iPhone, and I have to pivot all the 3 nodes in the view, which I have obtained in the following code: [CATransaction begin]; [CATransaction setValue:(id)kCFBooleanTrue forKey:kCATransactionDisableActions]; clockarm.layer.anchorPoint = CGPointMake(0.0, 0.0); [CATransaction commit]; [CATransaction begin]; [CATransaction setValue:(id)kCFBooleanFalse forKey:kCATransactionDisableActions]; [CATransaction setValue:[NSNumber numberWithFloat:50.0] forKey:kCATransactionAnimationDuration]; CABasicAnimation *animation; animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"]; animation.fromValue = [NSNumber numberWithFloat:-60.0]; animation.toValue = [NSNumber numberWithFloat:2 * M_PI]; animation.timingFunction = [CAMediaTimingFunction functionWithName: kCAMediaTimingFunctionLinear]; animation.delegate = self; [clockarm.layer addAnimation:animation forKey:@"rotationAnimation"]; animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]; [CATransaction commit]; The problem it's just rotating once, ie. only 360 degree and then stopping. I want to raotate the needles indefinitely. How would I do that?

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  • iPhone - User Defaults and UIImages

    - by Staros
    Hello, I've been developing an iPhone app for the last few months. Recently I wanted to up performance and cache a few of the images that are used in the UI. The images are downloaded randomly from the web by the user so I can't add specific images to the project. I'm also already using NSUserDefaults to save other info within the app. So now I'm attempting to save a dictionary of UIImages to my NSUserDefaults object and get... -[UIImage encodeWithCoder:]: unrecognized selector sent to instance I then decided to subclass UIImage with a class named UISaveableImage and implement NSCoding. So now I'm at... @implementation UISaveableImage -(void)encodeWithCoder:(NSCoder *)encoder { [encoder encodeObject:super forKey:@"image"]; } -(id)initWithCoder:(NSCoder *)decoder { if (self=[super init]){ super = [decoder decodeObjectForKey:@"image"]; } return self; } @end which isn't any better than where I started. If I was able to convert an UIImage to NSData I would be good, but all I can find are function like UIImagePNGRepresentation which require me to know what type of image this was. Something that UIImage doesn't allow me to do. Thoughts? I feel like I might have wandered down the wrong path...

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  • Set the width and height for a TTLauncherItem

    - by Koning Baard
    I have this: _launcherView.pages = [NSArray arrayWithObjects: [NSArray arrayWithObjects: [[[TTLauncherItem alloc] initWithTitle:@"New Note" image:@"bundle://Icon.png" style:TTSTYL URL:@"http://www.google.com/" canDelete:NO] autorelease], [[[TTLauncherItem alloc] initWithTitle:@"To Do Items" image:@"bundle://Icon.png" URL:@"http://www.yahoo.com/" canDelete:NO] autorelease], nil], nil]; How can I set the width and height for the items? I want all items to be 64x64 pixels. Thanks

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  • unarchiveObjectWithFile retain / autorelease needed?

    - by fuzzygoat
    Just a quick memory management question if I may ... Is the code below ok, or should I be doing a retain and autorelease, I get the feeling I should. But as per the rules unarchiveObjectWithFile does not contain new, copy or alloc. -(NSMutableArray *)loadGame { if([[NSFileManager defaultManager] fileExistsAtPath:[self pathForFile:@"gameData.plist"]]) { NSMutableArray *loadedGame = [NSKeyedUnarchiver unarchiveObjectWithFile:[self pathForFile:@"gameData.plist"]]; return loadedGame; } else return nil; } or -(NSMutableArray *)loadGame { if([[NSFileManager defaultManager] fileExistsAtPath:[self pathForFile:@"gameData.plist"]]) { NSMutableArray *loadedGame = [[NSKeyedUnarchiver unarchiveObjectWithFile:[self pathForFile:@"gameData.plist"]] retain]; return [loadedGame autorelease]; } else return nil; } gary

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  • Outputing struct to NSLog for debugging?

    - by fuzzygoat
    I am just curious, is there a way to print via NSLog the contents of a struct? id <MKAnnotation> mp = [annotationView annotation]; MKCoordinateRegion region = MKCoordinateRegionMakeWithDistance([mp coordinate], 350, 350); I am trying to output whats in [mp coordinate] for debugging. . EDIT_001: I cracked it, well unless there is another way. id <MKAnnotation> mp = [annotationView annotation]; CLLocationCoordinate2D location = [mp coordinate]; NSLog(@"LAT: %f LON: %f", location.latitude, location.longitude); many thanks gary

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  • UINavigationController from UIViewController

    - by 4thSpace
    I currently have this workflow in a tab based app: Tab1 loads... ViewOne : UIViewController >> PickerView : UIViewController >> DetailView : UIViewController "" means loads based on user action. I'd like navigation bars on PickerView and DetailView. PickerView just needs a cancel button in the top left of its nav bar. DetailView needs the normal navbar back button. I already have PickerView's nav bar wired up through IB and working. I'm not sure what to do with PickerView's nav bar. PickerView is also loaded from Tab2, who's main view starts as a UINavigationController. PickerView's nav bar works fine in that case. ViewOne should not have a navigation bar. Any ideas?

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