Sprite Kit：加载新场景后没有触摸响应答案

【问题标题】：Sprite Kit: No touch response after loading new sceneSprite Kit：加载新场景后没有触摸响应
【发布时间】：2016-08-24 22:51:54
【问题描述】：

当游戏结束时，我试图通过再次加载相同的场景来重置整个场景。但是在它加载之后，屏幕没有记录任何触摸。甚至touchesBegan 都没有工作。其他所有内容、精灵、动画等都已加载，但触摸未注册。

override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {
    player.physicsBody?.dynamic = true
    player.physicsBody?.velocity.dy = CGFloat(500)
    createLeftButton()
    createRightButton()

    createRightButtonFirst()
    createLeftButtonFirst()
}

func endGame() {
    gameOver = true
    scoreboardSetup()
    playButton()
    highscoreButton()
    label!.hidden = true
    timer2.invalidate()
    timer1.invalidate()
    player.physicsBody?.dynamic = false
}


func playButton() {
    let image = UIImage(named: "playButton") as UIImage?
    playbtn = UIButton();
    playbtn.setImage(image, forState: .Normal)
    playbtn.frame = CGRectMake(CGRectGetMidX(self.frame) - 152, CGRectGetMidY(self.frame) + 65, 133, 76) // X, Y, width, height

    playbtn.addTarget(self, action: #selector(GameScene.playBtn), forControlEvents: .TouchUpInside)
    self.view!.addSubview(playbtn)
}
func playBtn() {
    playbtn.removeFromSuperview()
    highscorebutton.removeFromSuperview()
    self.removeAllChildren()
    self.removeAllActions()
    self.scene?.removeFromParent()
    let gameScene:GameScene = GameScene(size: self.size) // create your new scene
    let transition = SKTransition.fadeWithDuration(1.0) // create type of transition (you can check in documentation for more transtions)
    self.view!.presentScene(gameScene, transition: transition)

}

【问题讨论】：

标签： ios swift sprite-kit

【解决方案1】：

解决了！必须从场景中删除所有子视图。最简单的方法是这样的：

view.subviews.forEach({ $0.removeFromSuperview() }) // this gets things done
view.subviews.map({ $0.removeFromSuperview() }) // this returns modified array

来源：How to remove all subviews of a view in Swift?

【讨论】：

第二条语句不需要，它返回一个没有用的数组。