1.自定义View中，只允许点击除了某子View以外的区域。

- (void)layoutSubviews

{

    [super layoutSubviews];

    UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap)];

    tap.delegate=self;

    [self addGestureRecognizer:tap];

}

- (BOOL)gestureRecognizer:(UIGestureRecognizer*)gestureRecognizer shouldReceiveTouch:(UITouch*)touch

{

    if([touch.viewisDescendantOfView:self.bgView])

    {

        returnNO;

    }

    return YES;

}