UISwipeGesture'无法识别的选择器发送到实例'

Question

如果有人可以帮我解决这个问题,那就太好了!我花了几个小时试图修复,没有运气

错误...

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 Scaling Rings [408:38776]金属GPU帧捕获启用2016-06-23 20:30:43.751531缩放环[408:38776]金属API验证已启用2016-06-23 20:30:48.293661缩放环[408:38776] - [Scaling_Rings.MenuScene slide:]:无法识别的选择器发送到实例0x145e1c410 2016- 06-23 20:30:48.299061 Scaling Rings [408:38776] *由于未捕获的异常'NSInvalidArgumentException'终止app,原因:' - [Scaling_Rings.MenuScene slide:]:无法识别的选择器发送到实例0x145e1c410'*第一次抛出调用堆栈:(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)的libc ++ abi.dylib:与uncaug终止 类型NSException(lldb)的异常

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)

    }

}

Answer 1

您需要将选择器声明更改为#selector(slide)并在方法参数之前添加下划线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)
    }
}