Open Radar

 
- Register a file presenter using [NSFileCoordinator addFilePresenter: self]
- the documentation states that on ARC and Garbage Collection, -removeFilePresenter must not be called
- it states that -removeFilePresenter is automatically performed if the presenter is deallocated

However, this seems not to be true, as the following example shows:

- The presenter is created inside an @autorelease pool
- A weak reference of the presenter is kept outside the autorelease
- The code waits until the weak reference is set to nil
- This never happens...

Please fix the documentation or the implementation.

-----
@interface MyPresenter : NSObject <NSFilePresenter>
{
	NSURL *_url;
	NSOperationQueue *_queue;
}

- (id)initWithURL:(NSURL *)url;

@end

@implementation MyPresenter

- (id)initWithURL:(NSURL *)url
{
	self = [self init];
	
	if (self) {
		_url = url;
		_queue = [NSOperationQueue new];
		_queue.maxConcurrentOperationCount = 1;
		
		// According to documentation, -addFilePresenter should not require a remove. This is done automatically for ARC...
		[NSFileCoordinator addFilePresenter: self];
	}
	
	return self;
}

- (NSURL *)presentedItemURL
{
	return _url;
}

- (NSOperationQueue *)presentedItemOperationQueue
{
	return _queue;
}

@end



int main(int argc, const char * argv[])
{
	@autoreleasepool {
		__weak MyPresenter *weakPresenter;
		
		@autoreleasepool {
			NSURL *url =  [NSURL fileURLWithPath: @"test.txt"];
			[@"abc" writeToURL:url atomically:YES encoding:NSUTF8StringEncoding error:NULL];

			// Create and register a presenter.
			MyPresenter *presenter = [[MyPresenter alloc] initWithURL: url];
			weakPresenter = presenter;
			
			// The presenter should be released when leaving the autoreleasepool. Seems not to happen.
		}
	    
		while(1) {
			// The presenter should be released eventually. However, this never happens
			if (weakPresenter == nil)
				break;
			
			[[NSRunLoop mainRunLoop] runUntilDate: [NSDate dateWithTimeIntervalSinceNow: 0.001]];
		}
		
	}
    return 0;
}