Re-issuing a touch event

Question

I'm trying to create an overlay view that monitors for touches and then disappears, but also forwards touch events to whatever is underneath the view.

My test app has a view with a button inside. I add the overlay view as another subview (sibling to the button, essentially), which takes up the entire screen.

For both solutions I tried, the overlay keeps state to determine how it responds to a touch. When a touchesBegan event is received, the overlay will stop responding to hitTest or pointInside until it receives a touchesCancelled or touchesEnded.

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    if(_respondToTouch)
    {
        NSLog(@"Responding to hit test");
        return [super hitTest:point withEvent:event];
    }
    NSLog(@"Ignoring hit test");
    return nil;
}

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    if(_respondToTouch)
    {
        NSLog(@"Responding to point inside");
        return [super pointInside:point withEvent:event];
    }
    NSLog(@"Ignoring point inside");
    return NO;
}

For my first approach, I tried re-issuing the event:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if(!_respondToTouch)
    {
        NSLog(@"Ignoring touches began");
        return;
    }
    NSLog(@"Responding to touches began");
    _respondToTouch = NO;

    [[UIApplication sharedApplication] sendEvent:event];
}

- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches cancelled");
    _respondToTouch = YES;
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches ended");
    _respondToTouch = YES;
}

However, the button didn't respond to the re-issued event.

My second approach was to use hitTest to discover the view (my button) underneath the overlay, and then send a touchesXXX message directly to it:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches began");
    _respondToTouch = NO;
    UITouch* touch = [touches anyObject];
    _touchDelegate = [[UIApplication sharedApplication].keyWindow hitTest:[touch locationInView:self.superview] withEvent:event];
    CGPoint locationInView = [touch locationInView:_touchDelegate];
    NSLog(@"Sending touch %@ to view %@. location in view = %f, %f", touch, _touchDelegate, locationInView.x, locationInView.y);
    [_touchDelegate touchesBegan:touches withEvent:event];
}

- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches cancelled");
    [_touchDelegate touchesCancelled:touches withEvent:event];
    _respondToTouch = YES;
}

- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches ended");
    [_touchDelegate touchesEnded:touches withEvent:event];
    _respondToTouch = YES;
}

- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"Touches moved");
    [_touchDelegate touchesMoved:touches withEvent:event];
}

It finds the button (according to the logs), but the button doesn't react at all when I invoke touchesXXX on it.

I'm not sure what else to try since the button won't respond to a direct invocation of touchesBegan =/