NS collection view or NSCollectionView, what it does, a documentation

hi.
if you're here, you're looking for documentation for the poorly described collection view. This is by no means exhaustive, but it is meant to complement and expand on Apple's official documentation. As far as I know this information IS NOT embargoed, just simply not documented yet. I want to focus on what it is, and what its features are, so that you, the developer new to collection views, do not have to try it, in order to decide if it works for you.
a collection view, represents objects with Views, in a similar way that matrices do with Cells.
the collection view lays out and dynamically tracks its content. it works very well with bindings, and expects to have a view prototype. It uses a Controller object called a collection view item (NSCollectionViewItem) to negotiate the tricky steps you'd have to go through to get the controls in the subView to hook up to the correct object.
as a developer, you create the collection View, you design the contents of the subView prototype, and you Bind the contents of the Subview to a special binding in the CollectionView Item. And finally you bind the content of the collectionView to an ArrayController. (you can do alll this programatically of course, but... you'd have to be insane)
At run time, the CollectionView asks its content for an array of representedObjects.
it then makes a new collectionViewItem for each represented object, and if you've bound your prototype view properly... the controls will be automatically bound to the right object.
from that point on, the collectionView man handles the subviews. it can auto resize them, it can shuffle them around so that they fit the collection view, and it has some cool options with hidden potential.
but... if you want to justify the subviews (have them crowd around the top of the collectionView) you can't
if you want to resize your subviews, (like the disclosure inspectors you can find in Painter, that are represented by bars, until you click on the bar, and it expands to get at the details) the collectionView has no mechanism to respond to subViews that change size.
theres my short description of NSCollectionView. if you have more to add, or questions, please feel free to post.

don't worry, it's normal and it will fade away by itself. If not, take it to your apple store

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#import <Cocoa/Cocoa.h>
#import "PersonManagedObject.h"
@interface PersonSelectionViewItem : NSCollectionViewItem {
NSTextField *label;
#pragma mark Finalizers
- (void)dealloc;
#pragma mark Outlets
@property (nonatomic, assign) IBOutlet NSTextField *label;
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- (void)removeKeyValueObserving;
#pragma mark Overrides
- (void)setRepresentedObject:(id)representedObject;
- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context;
@end
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@implementation PersonSelectionViewItem
#pragma mark Finalizers
- (void)dealloc{
[self removeKeyValueObserving];
[super dealloc];
#pragma mark Outlets
@synthesize name;
#pragma mark Instance Methods
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if ([keyPath isEqualToString:@"lastNameFirstName"]) {
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} else {
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I think you must be correct. I just ran into the problem again in yet another NIB. It was in the setRepresentedObject method. I simply put in the same line "\[self view\]" just before I needed to set the value of the view component and it worked again. If it is the same in other components I guess I just need to pay attention to it. Thanks for the information.
Message was edited by: Cycles4Fun

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if booted up with out all the way dry you might have fried it
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Click here to Backup the data on your BlackBerry Device! It's important, and FREE!
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NS collection view or NSCollectionView, what it does, a documentation

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