iOS 点击事件如何穿透透明的View?

-(id)hitTest:(CGPoint)pointwithEvent:(UIEvent *)event 
{
    UIView *hitView= [super hitTest:point withEvent:event];
    if (hitView== self)
    {
        return nil;
    }
    else 
    {
        return hitView;
    }
}

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event
{
    // 1.判断当前控件能否接收事件
    if (self.userInteractionEnabled == NO || self.hidden == YES || self.alpha <= 0.01) {return nil;}
    
    // 2. 判断点在不在当前控件
    if ([self pointInside:point withEvent:event] == NO) {return nil;}

    // 3.从后往前遍历自己的子控件
    NSInteger subViewCoutn = self.subviews.count;

    for (NSInteger i = subViewCoutn - 1; i >= 0; i--) {
        // 取subView
        UIView *childView = self.subviews[i];
        // 把当前控件上的坐标系转换成子控件上的坐标系
        CGPoint childP = [self convertPoint:point toView:childView];
        // 寻找到最合适的view
        UIView *fitView = [childView hitTest:childP withEvent:event];
        
        if (fitView) {
            return fitView;
        }
    }
    
    NSLog(@"点击了：%@",NSStringFromClass([self class]));

    // 循环结束,表示没有比自己更合适的view
    return self;
    
}