iOS解决单击和双击手势冲突问题

        //单击手势
        let tap = UITapGestureRecognizer(target: self, action: #selector(tapAct))
        tap.numberOfTapsRequired = 1
        contentView.addGestureRecognizer(tap)

        //双击手势
        let tap2 = UITapGestureRecognizer(target: self, action: #selector(tap2Act))
        tap2.numberOfTapsRequired = 2
        contentView.addGestureRecognizer(tap2)
        
      //关键代码
     tap.require(toFail: tap2)

    @objc private func tapAct() {
        print("tap act....")
    }
    
    @objc private func tap2Act() {
        print("tap 2 act....")
    }