UISwipeGesture '无法识别的选择器发送到实例' [英] UISwipeGesture 'unrecognized selector sent to instance'

问题描述

如果有人能帮我解决这个问题，那就太好了！我花了几个小时试图修复，但没有运气

If someone could please help me resolve this issue, would be great! I have spent a few hours trying to fix, with no luck

2016-06-23 20:30:43.341057 Scaling Rings[408:38903] [DYMTLInitPlatform] 平台初始化成功2016-06-23 20:30:43.750822 缩放环 [408:38776] 启用金属 GPU 帧捕获2016-06-23 20:30:43.751531 缩放环 [408:38776] 启用金属 API 验证2016-06-23 20:30:48.293661 缩放环 [408:38776] -[Scaling_Rings.MenuScene 幻灯片:]:无法识别的选择器发送到实例 0x145e1c4102016-06-23 20:30:48.299061 Scaling Rings[408:38776] * 由于未捕获的异常NSInvalidArgumentException"而终止应用程序，原因:-[Scaling_Rings.MenuScene 幻灯片:]:无法识别的选择器发送到实例"* 先抛出调用栈:(0x190ad9980 0x1900d44bc 0x190ae0778 0x190add6e0 0x1909de61c 0x196e13754 0x196e16e5c 0x1969f6b3c 0x196894900 0x196e0747c 0x196e07100 0x196e06338 0x196892a24 0x1968638c8 0x19701efd4 0x19701941c 0x190a8a3f0 0x190a89cc8 0x190a87938 0x1909ba2e4 0x19239315c 0x1968ce6fc 0x1968c9438 0x1000a1d44 0x19055c600)libc++abi.dylib:以未捕获的 NSException 类型异常终止(lldb)

2016-06-23 20:30:43.341057 Scaling Rings[408:38903] [DYMTLInitPlatform] platform initialization successful 2016-06-23 20:30:43.750822 Scaling Rings[408:38776] Metal GPU Frame Capture Enabled 2016-06-23 20:30:43.751531 Scaling Rings[408:38776] Metal API Validation Enabled 2016-06-23 20:30:48.293661 Scaling Rings[408:38776] -[Scaling_Rings.MenuScene slide:]: unrecognized selector sent to instance 0x145e1c410 2016-06-23 20:30:48.299061 Scaling Rings[408:38776] * Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Scaling_Rings.MenuScene slide:]: unrecognized selector sent to instance 0x145e1c410' * First throw call stack: (0x190ad9980 0x1900d44bc 0x190ae0778 0x190add6e0 0x1909de61c 0x196e13754 0x196e16e5c 0x1969f6b3c 0x196894900 0x196e0747c 0x196e07100 0x196e06338 0x196892a24 0x1968638c8 0x19701efd4 0x19701941c 0x190a8a3f0 0x190a89cc8 0x190a87938 0x1909ba2e4 0x19239315c 0x1968ce6fc 0x1968c9438 0x1000a1d44 0x19055c600) libc++abi.dylib: terminating with uncaught exception of type NSException (lldb)

代码...

import Foundation
import SpriteKit

var startRing = SKShapeNode()

class MenuScene: SKScene {

    func slide(sender: AnyObject){
        debugPrint("WORKS")
    }

    override func didMove(to view: SKView) {

        let upSwipe = UISwipeGestureRecognizer(target: self, action: Selector("slide:"))
        upSwipe.direction = .up
        view.addGestureRecognizer(upSwipe)

    }

}

推荐答案

您需要将选择器声明更改为 #selector(slide) 并在方法参数 func slide 之前添加下划线(_ 发件人:UISwipeGestureRecognizer):

You need to change your selector declaration to #selector(slide) and add an underscore before your method parameter func slide(_ sender: UISwipeGestureRecognizer):

class GameScene: SKScene {

    @objc func slide(_ sender: UISwipeGestureRecognizer){
        print("WORKS")
    }
    override func didMove(to view: SKView) {
        let upSwipe = UISwipeGestureRecognizer(target: self, action: #selector(slide))
        upSwipe.direction = .up
        view.addGestureRecognizer(upSwipe)
    }
}

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