Instruments doesn't detect memory leak

Hi guys,

I have the following code inside an UIViewController :

Code:

- (void) viewDidLoad {
    NSLog(@"viewDidLoad");
    [super viewDidLoad];
    button = [[UIButton alloc] init];
    [self.view addSubview:button];
}

When i generate a memory warning, this UIViewController's view will be unloaded. (i know it because i print out inside viewDidUnload method). The 'button' is still there, since we keep a reference to it.

The problem is, when the viewDidLoad is called again, we assign 'button' to a new UIButton created, then there should be a memory leak. But the Instruments app doesn't detect this leak.

I have no idea why. Any one ?

 

Hi,

I'm running on the Simulator.

I still can not figure out why.