OC View添加手势,防止View上点击其他视图触发点击效果

• 设置手势代理,实现UITapGestureRecognizer的一个代理方法

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
 
    if ([touch.view isDescendantOfView:self.smallView]) {
        return NO;
    }
    return YES;
}