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UISwipeGestureRecognizer抛出无法识别的选择器发送错误

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我的iOS应用程序中出现 unrecognized selector sent 错误 . 我尝试根据其他类似线程中提到的答案解决问题，但失败了 . 请看下面的代码，并帮助我 .

谢谢

class ThirdViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        // Do any additional setup after loading the view.



        let leftSwipe = UISwipeGestureRecognizer(target: self, action:  Selector(("HandleSwipes:")))

        let rightSwipe = UISwipeGestureRecognizer(target: self, action:   Selector(("HandleSwipes:")))

        leftSwipe.direction = .left
        rightSwipe.direction = .right


        view.addGestureRecognizer(leftSwipe)
        view.addGestureRecognizer(rightSwipe)



    }



    func HandleSwipes(sender: UISwipeGestureRecognizer) {

        //if(sender.direction == .left)
        //{
        //    tabBarController?.selectedIndex = 1
        //}
    }
}
ios swift uigesturerecognizer swift3

2 回答

  • 2

    像这样写选择器 .

    Swift 2.3 or lower.

    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))
let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))

    Swift 3

    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(sender:)))
let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(sender:)))

    Note: 一个建议是电池方法名称始终以小写字母而不是大写字母开头 . 因此，如果您使用 handleSwipes 而不是 HandleSwipes ，那就更好了 .

    回复于
  • 5

    你需要打个电话

    override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.


    let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))

    let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(HandleSwipes(_:)))

    leftSwipe.direction = .left
    rightSwipe.direction = .right


    view.addGestureRecognizer(leftSwipe)
    view.addGestureRecognizer(rightSwipe)
}

    呼叫方法如

    func HandleSwipes(_ sender: UISwipeGestureRecognizer){

    if(sender.direction == .left)
    {
       print("Swiped left")
    }
}
    回复于

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