Hit Testing a UIButton located outside bounds of SuperView - ios

Question

I am trying to animate this view ControlsView up by touchUpInside in the UIButton which is the carrot character inside the white square in the image attached. When the button is hit, a delegate method is fired an the controlsView is animated up. The problem is that because the UIButton is outside of the bounds of controlsView it does not receive touch info.
I have thought about this a lot and read up on some potential candidate solutions. Such as detecting the touch event on a super view by overriding hitTest:withEvent:. However, the UIButton is actually a subview of CockPitView which is a subview of ControlsView which is a subview of MainView. MainView, it seems, is the rectangle whose coordinates the UIButton would truly lie in. So would I override hitTest there and pass the touch info to CockPitView, where I could then have my Button trigger its action callback?
Has anyone encountered this or a similar problem and have any advice on how to proceed?

Answer 1

You should override hitTest in your custom view CockPitView
- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
if (!self.clipsToBounds && !self.hidden && self.alpha > 0) {
for (UIView *subview in self.subviews.reverseObjectEnumerator) {
CGPoint subPoint = [subview convertPoint:point fromView:self];
UIView *result = [subview hitTest:subPoint withEvent:event];
if (result != nil) {
return result;
}
}
}
return nil;
}
CockPitView has to be a subclass of UIView

Answer 2

You may want to use -pointInside:withEvent:. In your button's superview, i.e., ControlsView, override the method like this:
- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
// self.button is the button outside the bounds of your ControlsView
if (CGRectContainsPoint(self.button.bounds, [self convertPoint:point toView:self.button])) {
return YES;
}
return [super pointInside:point withEvent:event];
}
By doing this, your ControlsView claims that the points inside the bounds of your button should be treated like the points inside your ControlsView.