Subview of custom UIButton class doesn't trigger click - ios

Question

I'm writing a custom UIButton subclass, to create my own fully customized button
to have total controll. Still, I'm having problems when I try to add a subview
to that UIButton's view. The subview blocks the "touch" events so it won't bubble to
the UIButton itself..
This is a demonstration:
I first create my CustomNavigationButton, with a frame.. It's magenta.
I can see the magenta on the screen so it's there. Secondly, I add a subview
to that CustomNavigationButton (which is green), I can see the green so it's
there, but if I click the green rectangle (subview), the "UIControlEventTouchUpInside"
doesn't get called on my CustomNavigationButton..
In my AppDelete:
CustomNavigationButton* mapBtn = [[CustomNavigationButton alloc] initWithFrame:CGRectMake(0, 0, 100, 25)];
mapBtn.backgroundColor = [UIColor magentaColor];
[mapBtn addTarget:self action:#selector(goMapHandler:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:mapBtn];
And here's my CustomNavigationButton class (which is a subclass of UIButton)
#implementation CustomNavigationButton
#synthesize bg;
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// STORE INITIAL FRAME
self.initialFrame = frame;
bg = [[UIView alloc] initWithFrame:CGRectMake(0, 20, 40, 40)];
bg.backgroundColor = [UIColor greenColor];
[bg setUserInteractionEnabled:YES];
[self addSubview:bg];
}
return self;
}
#end

Answer 1

I figured out how to do it!
If "bg" is the subview I'm adding to the UIButton, then you should do:
bg.userInteractionEnabled = NO;
bg.exclusiveTouch = NO;
But keep in mind that, if your subview extends the frame of the UIButton,
a touch will not occur! You can check if your subview exceeds the UIButton
by giving the UIButton a background-color.