Swift 3:无法识别的选择器发送到实例 Xcode 8 [英] Swift 3: Unrecognized selector sent to instance Xcode 8

问题描述

我以编程方式创建了一个 UIView 并将 UIPanGestureRecognizer 添加到它:

I have programmatically created an UIView and added UIPanGestureRecognizer to it:

class ViewController: UIViewController{
    var preludeView: UIView!

    override func viewDidLoad() {
        super.viewDidLoad()

        initViews()
        createConstrants()

        let panGestureRecognizer = UIPanGestureRecognizer(target: self, action: Selector(("handleTap:")))
        preludeView.addGestureRecognizer(panGestureRecognizer)
    }

    func handleTap(recognizer: UIPanGestureRecognizer) {
        print("WORKING!!!!")
    }

    func initViews() {
        ...
    }

    func createConstrants() {
        ...
    }
}

但是当我触摸视图时，Xcode 抛出错误:

But when I am touching the view Xcode is throwing an error:

2016-07-13 09:24:29.918 Draft_Hypa_02[661:83024]-[Draft_Hypa_02.ViewController handleTap:]:无法识别的选择器发送到实例 0x17d94a10 2016-07-13 09:24:29.921Draft_Hypa_02[661:83024] * 由于未捕获的异常而终止应用'NSInvalidArgumentException'，原因:'-[Draft_Hypa_02.ViewControllerhandleTap:]: 无法识别的选择器发送到实例 0x17d94a10'* 第一次抛出调用栈:(0x249cf91b 0x2416ae17 0x249d52b5 0x249d2ee1 0x248fe238 0x294ae9eb 0x290e984f 0x28f7aff1 0x294afd0x28f3ba57 0x28f38017 0x28f78ec9 0x28f7867b 0x28f49125 0x28f476d30x24991dff 0x249919ed 0x2498fd5b 0x248df229 0x248df015 0x25ecfac90x28fb1189 0x93144 0x24587873) libc++abi.dylib:终止于NSException 类型的未捕获异常

2016-07-13 09:24:29.918 Draft_Hypa_02[661:83024] -[Draft_Hypa_02.ViewController handleTap:]: unrecognized selector sent to instance 0x17d94a10 2016-07-13 09:24:29.921 Draft_Hypa_02[661:83024] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Draft_Hypa_02.ViewController handleTap:]: unrecognized selector sent to instance 0x17d94a10' * First throw call stack: (0x249cf91b 0x2416ae17 0x249d52b5 0x249d2ee1 0x248fe238 0x294ae9eb 0x290e984f 0x28f7aff1 0x294afd4f 0x28f3ba57 0x28f38017 0x28f78ec9 0x28f7867b 0x28f49125 0x28f476d3 0x24991dff 0x249919ed 0x2498fd5b 0x248df229 0x248df015 0x25ecfac9 0x28fb1189 0x93144 0x24587873) libc++abi.dylib: terminating with uncaught exception of type NSException

但是，如果我删除 handleTap 函数中的参数并删除 Selector(("handleTap:")) 中的冒号，一切正常！

However, if I remove argument in the handleTap function and remove the colon in the Selector(("handleTap:")), everything works fine!

已经花了一天时间尝试解决此问题，非常感谢您的帮助！

Already spent a day to try to fix this issue and would be very appreciate for your help!

推荐答案

如果你使用的是 swift 3 你的 selector 应该是这样的

If you are using swift 3 your selector should be like this

#selector(self.handleTap(recognizer:))

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