IBOutlet collection release problem

问题

I have an array for IBOutlet collection

.h

@interface UpisiRezultat : UIViewController {
    NSArray *buttons;
}

@property (nonatomic, retain) IBOutletCollection(UIButton) NSArray *buttons;

.m

@synthesize buttons;

- (void)viewDidLoad
{
    [self setValue:[UIFont fontWithName:@"NeverSayNever" size:22] forKeyPath:@"buttons.font"];
    [super viewDidLoad];
}

- (void)viewDidUnload
{
    buttons = nil;
}

- (void)dealloc
{
    [buttons release]; --> Error
    [super dealloc];
}

Why does my program crash when I have [buttons release]; in dealloc? Without it, it doesn't crash...

回答1:

updated(Dec1) code and Tested.

- (void)dealloc {

    self.buttons = nil;

    [super dealloc];
}

you should not release them.

http://www.bobmccune.com/2011/01/31/using-ios-4s-iboutletcollection/

回答2:

If you have made a connection to your buttons with Interface Builder, it's your view that owns it and will release it.

回答3:

Since buttons is an NSArray and it is explicitly retained, then it must be released and then set to nil in -dealloc.

See Darren's answer at: Settings IBOutlets to nil in dealloc See an IBOutletCollection example at: http://www.bobmccune.com/2011/01/31/using-ios-4s-iboutletcollection/.

来源：https://stackoverflow.com/questions/6749563/iboutlet-collection-release-problem