Question

当我尝试向上滑动手势时，我一直收到这些错误。滑动＆＃34;右＆＃34;没事，但是＆＃34; up＆＃34;会抛出错误。

任何帮助都会很棒。

提前致谢。

2015-12-24 14：53：36.977 Swipes＆amp; Shake [58213：9895793] - [Swipes ___ Shake.ViewController刷过]：无法识别的选择器发送到实例0x7fc549ea4400

2015-12-24 14：53：36.982 Swipes＆amp; Shake [58213：9895793] ***由于未捕获的异常终止应用程序＆＃39; NSInvalidArgumentException＆＃39;，原因：＆＃39; - [Swipes ___ Shake.ViewController刷过]：无法识别的选择器发送到实例0x7fc549ea4400＆＃39;

libc ++ abi.dylib：以NSException类型的未捕获异常终止   （lldb）

import UIKit

class ViewController: UIViewController {

override func viewDidLoad() {
    super.viewDidLoad()
    var swipeRight = UISwipeGestureRecognizer(target: self, action: "swiped:")
    swipeRight.direction = UISwipeGestureRecognizerDirection.Right
    self.view.addGestureRecognizer(swipeRight)

    var swipeUp = UISwipeGestureRecognizer(target: self, action: "swiped")
    swipeUp.direction = UISwipeGestureRecognizerDirection.Up
    self.view.addGestureRecognizer(swipeUp)
    }

func swiped(gesture: UIGestureRecognizer)
{
    if let swipeGesture =  gesture as? UISwipeGestureRecognizer
    {
        switch swipeGesture.direction
        {
        case UISwipeGestureRecognizerDirection.Right:
            print("RIGHT")
        case UISwipeGestureRecognizerDirection.Up:
            print("UP")
        default:
            break
        }
    }
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


}

Answer 1

在:

中的swiped之后，您错过了var swipeUp = UISwipeGestureRecognizer(target: self, action: "swiped")

正确是var swipeUp = UISwipeGestureRecognizer(target: self, action: "swiped:")

Swift：向上滑动时出错

1 个答案: