NSCollectionView item crashes when bound

[Benjamin Rindt]

Hey guys I'm really grinding with the NSCollectionView when its bound. I had a 
running collection view but wanted to use bindings, I looks like it should 
work, but it doesn't. This is written just in code not in IB. 



Hope you guys can help :)



The problem is, the View is displayed correctly, but as soon as I try to bind a 
property in the newItemForRepresentedObject method, it is trying to call 
setChannelID (I can see it in the console outputting "hello" all the time, but 
keeps stuck in the else part of the if statement. It never gets to make the if 
true, always trying to set it. There is no output after the self.channelID = 
chanID; command, there is just another hello. I think the ChannelView property 
is not holding the data. The program crashes after 10 seconds trying to set the 
value. It should be possible to do this, others have obviously bound in the 
newItemForRepresentedObject.

Anyway, any help is appreciated this is the code:

ChannelView

#import <Cocoa/Cocoa.h>

@interface ChannelView : NSView

@property (readwrite, nonatomic, copy) NSString *channelName;
@property (readwrite, nonatomic, copy) NSNumber *channelID;

@property (readwrite) NSTextField *channelNameField;
@property (readwrite) NSTextField *deviceChannelField;



@end


@implementation ChannelView

- (id)initWithFrame:(NSRect)frame
{
self = [super initWithFrame:NSMakeRect(0, 0, 300, 500)];
if (self) {
    // Initialization code here.

    ColorView *test = [[ColorView alloc] initWithFrame:NSMakeRect(0, 0, 100, 
100)];

    self.channelNameField = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 0, 
100, 20)];
    self.deviceChannelField = [[NSTextField alloc] initWithFrame:NSMakeRect(0, 
50, 100, 20)];

    [self addSubview:test];
    [self addSubview:self.channelNameField];
    [self addSubview:self.deviceChannelField];
}

return self;
}

-(id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];


    //add die teile


return self;
}

- (void)drawRect:(NSRect)dirtyRect
{
// Drawing code here.
}


// setters.


 -(void)setChannelID:(NSNumber *)chanID
{
    //NSLog(@"hallo");
if (self.channelID == chanID) {
    return;
    NSLog(@"da");
}
else {
    NSLog(@"hello"); //just this in debug output
//self.channelID = [chanID copy];
    NSLog(@"no output");
        self.channelID = chanID;
NSLog(@"chanid %d current: %d", chanID.intValue, self.channelID.intValue); 
//never shown in debug
[self.deviceChannelField setStringValue:[NSString     
stringWithFormat:@"%d",self.channelID.intValue]];
}
} 

@end
The piece of my subclassed NSCollectionView

- (NSCollectionViewItem *)newItemForRepresentedObject:(ChannelsToMixes*)object
{
NSCollectionViewItem *item = [super newItemForRepresentedObject:object];
    // ChannelView *view = (ChannelView *)[item view];

NSLog(@"cahnnelid: %d",object.channelID.intValue);

    // [view bind:@"title" toObject:object withKeyPath:@"title" options:nil];

     [item.view bind:@"channelID" toObject:object withKeyPath:@"channelID" 
options:nil];
    //NSLog(@"test");

    //NSLog(@"%@",object);

return item;
}


self.collectionView = [[ChannelCollectionView alloc] 
initWithFrame:NSMakeRect(10, 0, width, self.splitview.frame.size.height)];
[self.collectionView setItemPrototype:[ChannelViewItemController new]];
[self.collectionView setMaxNumberOfRows:1];
[self.collectionView setAutoresizingMask:(NSViewMinXMargin | NSViewWidthSizable 
| NSViewMaxXMargin | NSViewMinYMargin  | NSViewHeightSizable| 
NSViewMaxYMargin)];
[self.collectionView setAutoresizesSubviews:YES];
[self.collectionView bind:NSContentBinding toObject:self.channelController 
withKeyPath:@"arrangedObjects" options:nil];
ChannelViewItemController:

@implementation ChannelViewItemController

-(void)loadView {

[self setView:[[ChannelView alloc] initWithFrame:NSZeroRect]];
}

@end
The actual value is passed to the setter method, but just not held by the 
property I think, but why? Tried multiple properties, strong, readwrite atomic 
or nonatmoic but thats not helping.

What is the thing to get the NSCollectionView set up with bindings?



Thanks 

Benjamin
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