UISwipeGestureRecognizer抛出无法识别的选择器发送错误 [英] UISwipeGestureRecognizer throw unrecognised selector sent error

问题描述

我的iOS应用程序中出现无法识别的选择器错误。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。

I am getting unrecognized selector sent error in my iOS application. I tried solving the issue based on the answers mentioned in other similar thread but failed. Please have a look at the code below and help me with this.

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
        //}
    }
}

推荐答案

像这样写选择器。

Swift 2.3或更低。

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:)))

注意：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。

Note: One suggestion it is batter method name always start with lower case not upper case. So it is batter if you use handleSwipes instead of HandleSwipes.

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