超出父视图部分响应事件

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    UIView *view = [super hitTest:point withEvent:event];
    if (view == nil) {
        
        for (UIView *subView in self.subviews) {
            CGPoint position = [self convertPoint:point toView:subView];
            if (CGRectContainsPoint(subView.bounds, position)) {
                view = subView;
                break;
            }
        }
        
    }
    return view;
}