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PONSCollectionView draws nothing
 

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    <p>I'm trying to set up an <code>NSCollectionView</code> (I have done this successfully in the past, but for some reason it fails this time).</p> <p>I have a model class called "TestModel", and it has an <code>NSString</code> property that just returns a string (just for testing purposes right now). I then have an <code>NSMutableArray</code> property declaration in my main app delegate class, and to this array I add instances of the <code>TestModel</code> object.</p> <p>I then have an Array Controller that has its Content Array bound the app delegate's <code>NSMutableArray</code>. I can confirm that everything up to here is working fine; NSLogging:</p> <pre><code>[[[arrayController arrangedObjects] objectAtIndex:0] teststring] </code></pre> <p>worked fine.</p> <p>I then have all the appropriate bindings for the collection view set up, (itemPrototype and content), and for the Collection View Item (view). I then have a text field in the collection item view that is bound to Collection View <code>Item.representedObject.teststring</code>. However NOTHING displays in the collection view when I start the app, just a blank white screen. What am I missing?</p> <p><strong>UPDATE: Here is the code I use (requested by wil shipley):</strong></p> <pre><code>// App delegate class @interface AppController : NSObject { NSMutableArray *objectArray; } @property (readwrite, retain) NSMutableArray *objectArray; @end @implementation AppController @synthesize objectArray; - (id)init { if (self = [super init]) { objectArray = [[NSMutableArray alloc] init]; } return self; } - (void)applicationDidFinishLaunching:(NSNotification *)aNotification { TestModel *test = [[[TestModel alloc] initWithString:@"somerandomstring"] autorelease]; if (test) [objectArray addObject:test]; } @end // The model class (TestModel) @interface TestModel : NSObject { NSString *teststring; } @property (readwrite, retain) NSString *teststring; - (id)initWithString:(NSString*)customString; @end @implementation TestModel @synthesize teststring; - (id)initWithString:(NSString*)customString { [self setTeststring:customString]; } - (void)dealloc { [teststring release]; } @end </code></pre> <p>And then like I said the content array of the Array Controller is bound to this "objectArray", and the Content of the NSCollectionView is bound to Array Controller.arrangedObjects. I can verify that the Array Controller has the objects in it by NSLogging [arrayController arrangedObjects], and it returns the correct object. Its just that nothing displays in the NSCollectionView.</p> <p><strong>UPDATE 2: If I log [collectionView content] I get nothing:</strong></p> <pre><code>2009-10-21 08:02:42.385 CollViewTest[743:a0f] ( ) </code></pre> <p>The problem is probably there.</p> <p><strong>UPDATE 3: As requested here is the Xcode project:</strong></p> <p><a href="http://www.mediafire.com/?mjgdzgjjfzw" rel="noreferrer">http://www.mediafire.com/?mjgdzgjjfzw</a></p> <p>Its a menubar app, so it has no window. When you build and run the app you'll see a menubar item that says "test", this opens the view that contains the NSCollectionView.</p> <p>Thanks</p>
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    1. USPeter Hosey
    1. USindragie
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      1. USindragie
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    1. COHow do you modify the mutable array in the delegate? Can you post the code?
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      1. USWil Shipley
    2. COI have edited the post and added the code I use
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      1. USindragie
    3. COThe code you posted doesn't tell us anything about whether your bindings are connected properly. You'll need to post the project somewhere.
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      1. USNSResponder
 

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