Do I need to release a gesture recognizer?

问题:

If I add a gesture recognizer to a table cell called cell, e.g.:

UILongPressGestureRecognizer *_longPressRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(cellGestureRecognized:)];
_longPressRecognizer.allowableMovement = 20;
_longPressRecognizer.minimumPressDuration = 1.0f;
[cell addGestureRecognizer:_longPressRecognizer];
[_longPressRecognizer release], _longPressRecognizer = nil; 

Do I need to manually call -removeGestureRecognizer: on this cell at some point, or does the gesture recognizer get removed and released for me when the cell is no longer used?

回答1:

The gesture recognizers are added to an internal NSMutableArray of the view. This array will be released once the view is deallocated. Thus -removeGestureRecognizer: doesn't need to be called manually.