在透明的UIView中重写下面这个函数即可：

OC：

- (UIView*)hitTest:(CGPoint)point withEvent:(UIEvent *)event{

UIView *hitView = [super hitTest:point withEvent:event];

if(hitView == self){

return nil;

}

return hitView;

}

Swift：

override func hitTest(_ point: CGPoint, with event: UIEvent?) -> UIView? {

let hitView = super.hitTest(point, with: event)

if(hitView == self){

return nil

}

return hitView

}

纯属个人笔记，如有错误，欢迎指出。