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所以當用戶收到一個文本或進入通知中心或離開應用一個函數稱爲pauseGame（）應該運行，它的第一次正常工作，但如果有人被接收另一個文本或再次進入通知中心，那麼應用程序將崩潰，我的問題是爲什麼它第一次工作，但第二次崩潰？我認爲這與定時器有關，但是請你看看我的代碼，我一直在用谷歌搜索，這是我的最後一招！謝謝你們！！ （另外這個代碼適用於iOS 9罰款和屢試不爽，但問題是在iOS 8）遊戲崩潰後applicationWillResignActive被調用不止一次
這裏是調用的函數，當用戶進入後臺
func applicationWillResignActive(application: UIApplication) {
print("Reply to Text or Notification Center or Multitasking")
NSNotificationCenter.defaultCenter().postNotificationName("pauseGame", object: self)
}
這裏是我的暫停功能
func pauseGame() {
if(paused == false) {
//STOPS UPDATE AND MOVEMENT OF NODES
if (gameOver == false) {
spawnTopTimer.invalidate()
spawnBottomTimer.invalidate()
spawnLeftTimer.invalidate()
spawnRightTimer.invalidate()
scoreTimer.invalidate()
paused = true
pauseScreenActive = true
player.physicsBody!.categoryBitMask = colisionType.Enemy.rawValue
player.physicsBody!.contactTestBitMask = colisionType.Player.rawValue
player.physicsBody!.collisionBitMask = colisionType.Player.rawValue
//RESETS NODES TO VISABLE
pauseBtn.hidden = true
screenContainer.hidden = false
resumeBtn.hidden = false
homeBtn.hidden = false
highscoreLabel.hidden = false
currentScoreLabel.hidden = false
pauseLabel.hidden = false
//PAUSE SCREEN NODES
screenContainer.size = CGSize(width: self.frame.size.width , height: self.frame.size.width)
screenContainer.alpha = 0.8
screenContainer.position = CGPointMake(self.frame.size.width/2, self.frame.size.height/2)
screenContainer.zPosition = 900
pauseLabel.text = "PAUSED"
pauseLabel.position = CGPointMake(self.frame.size.width/2, self.frame.size.height*0.69)
pauseLabel.fontSize = 60
pauseLabel.zPosition = 999
resumeBtn.size = CGSize(width: 400, height: 80)
resumeBtn.position = CGPointMake(self.frame.size.width/2, self.frame.size.height*0.6)
resumeBtn.zPosition = 999
homeBtn.size = CGSize(width: 400, height: 80)
homeBtn.position = CGPointMake(self.frame.size.width/2, self.frame.size.height*0.45)
homeBtn.zPosition = 999
currentScoreLabel.text = "Current Score: " + String(score-1)
currentScoreLabel.position = CGPointMake(self.frame.size.width/2, self.frame.size.height*0.33)
currentScoreLabel.fontSize = 40
currentScoreLabel.zPosition = 999
if(highscore == 0) {
highscoreLabel.text = "Highscore: " + String(0)
} else {
highscoreLabel.text = "Highscore: " + String(highscore-1)
}
highscoreLabel.position = CGPointMake(self.frame.size.width/2, self.frame.size.height*0.26)
highscoreLabel.fontSize = 40
highscoreLabel.zPosition = 999
}
}
}
這裏是我的通知
NSNotificationCenter.defaultCenter().addObserver(self, selector: Selector("pauseGame"), name: "pauseGame", object: nil)
這裏是恢復碼遊戲後
if self.nodeAtPoint(location) == resumeBtn {
if(pauseScreenActive == true) {
//HIDE PAUSE SCREEN
screenContainer.hidden = true
resumeBtn.hidden = true
homeBtn.hidden = true
highscoreLabel.hidden = true
currentScoreLabel.hidden = true
pauseBtn.hidden = false
pauseLabel.hidden = true
player.physicsBody!.categoryBitMask = colisionType.Player.rawValue
player.physicsBody!.contactTestBitMask = colisionType.Enemy.rawValue
player.physicsBody!.collisionBitMask = colisionType.Enemy.rawValue
spawnTopTimer = NSTimer.scheduledTimerWithTimeInterval(ySpeed, target: self, selector: Selector("spawnTop"), userInfo: nil, repeats: true)
spawnBottomTimer = NSTimer.scheduledTimerWithTimeInterval(ySpeed, target: self, selector: Selector("spawnBottom"), userInfo: nil, repeats: true)
spawnLeftTimer = NSTimer.scheduledTimerWithTimeInterval(xSpeed, target: self, selector: Selector("spawnLeft"), userInfo: nil, repeats: true)
spawnRightTimer = NSTimer.scheduledTimerWithTimeInterval(xSpeed, target: self, selector: Selector("spawnRight"), userInfo: nil, repeats: true)
print("Resume Speed with xValue: " + String(xSpeed) + " and yValue " + String(ySpeed))
scoreTimer = NSTimer.scheduledTimerWithTimeInterval(1, target: self, selector: Selector("scoreCalculator"), userInfo: nil, repeats: true)
paused = false
pauseScreenActive = false
}
}