UIBarButtonItem not clickable after changing position - ios

Question

I'm using Xcode 8.0.
I add a custom left barbutton to my NavBar:
UIImage * imageNormal = [UIImage imageNamed:#"InfoIcon"];
UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
[button addTarget:self action:#selector(testPressed ) forControlEvents:UIControlEventTouchUpInside];
[button setBackgroundImage:imageNormal forState:UIControlStateNormal];
// set the frame of the button
button.frame = CGRectMake(0, 0, imageNormal.size.width, imageNormal.size.height);
UIView * view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, imageNormal.size.width, imageNormal.size.height)];
[view addSubview:button];
// set the barbuttonitem to be the view
UIBarButtonItem * barButtonItem = [[UIBarButtonItem alloc] initWithCustomView:view];
self.navigationItem.leftBarButtonItem = barButtonItem;
Here what I got:
unfortunately my button is not centered because the Nav bar has a custom image higher than the standard. But if I press the info Icon it works.
If I change the icon position with this line of code:
button.frame = CGRectMake(0, -30, imageNormal.size.width, imageNormal.size.height);
I got the right positioning:
But in this case the bar button is not anymore clickable, and I don't get why this is happening.
As workaround I attach a gesture to the view:
UITapGestureRecognizer *_tapOnVideoRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self.revealViewController action:#selector(revealToggle:)];
[view addGestureRecognizer:_tapOnVideoRecognizer];
it works, but the tap is on the view and not on the button so that the changing status of the button when pressed is not working.
#JakubKnejzlik from https://stackoverflow.com/a/12554715/1320479
suggests:
This can be fixed by subclassing the wrapper view (superview of button, custom view of uibarbuttonitem) and overriding the hittest method to return button accordingly.
But I have no idea how to do it