Navigation Bar custom button - ios

Question

backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton addTarget:self action:#selector(gotoAmphorasViewController) forControlEvents:UIControlEventTouchUpInside];
[backButton setFrame:CGRectMake(0.0f,0.0f, 44,44)];
The problem i am facing is that though the button dimensions are44*44, wherever i tap anywhere around it, the the button action is fired.

Answer 1

Please try the bellow code : its working properly
- (void)viewDidLoad {
[super viewDidLoad];
UIImage *buttonImage = [UIImage imageNamed:#"back.png"];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:buttonImage forState:UIControlStateNormal];
button.frame = CGRectMake(0, 0, buttonImage.size.width, buttonImage.size.height);
[button addTarget:self action:#selector(back) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = customBarItem;
[customBarItem release];
}
-(void)back {
[self.navigationController popViewControllerAnimated:YES];
}

Answer 2

Its not a bug. It is a default behaviour. In iPhone, for navigation bar buttons the touch detection is little more expanded rather than its frame. Just have a look on any other application. Everywhere the button get fired if we tap nearer but outside its frame.

Answer 3

It's the intended behaviour, if you really want to limit the area of the touch, you can wrap the button inside a UIView:
UIView *buttonContainer = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)];
[buttonContainer addSubview:button];
_barButton = [[UIBarButtonItem alloc] initWithCustomView:buttonContainer];