NSMutableArray containsObject method not detecting object

NSMutableArray containsObject method not detecting object

// Add the button to the NSMutableArray. ... UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; [[self hBtns] addObject:btn]; ...  // In another method, try to see if it exists. - (void)didPushBtn:(id)sender {   UIButton *btn = (UIButton *)sender;   if ([[self hBtns] containsObject:btn]) // Is false every time.   ... } 

Why is it not detecting that the UIButton is in the array?


It turns out that it won't even detect it right after it's added:

UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom]; [[self hBtns] addObject:btn]; if ([[self hBtns] containsObject:btn]) // Returns false. 

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[self setHBtns:[[NSMutableArray alloc] initWithCapacity:0]]; 

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