UISwipeGestureRecognizer的奇怪行爲 - 微型冷凍應用程序

Question

我有一個Swiperecognizer奇怪的問題。

我在屏幕上產卵物體。

let SpawnObject = SKAction.run({ 
     () in 

     showobject() 

    }) 

    let delay1 = SKAction.wait(forDuration: 0.9) 
    let SpawnDelay1 = SKAction.sequence([SpawnObject,delay1]) 
    let SpawnDelayForever1 = SKAction.repeatForever(SpawnDelay1) 
    self.run(SpawnDelayForever1) 

    let distance = CGFloat(self.frame.height + 200) 
    let moveObject = SKAction.moveBy(x: -distance, y: 0, duration: TimeInterval(0.004 * distance)) 
    let removeObject = SKAction.removeFromParent() 
    moveAndRemove = SKAction.sequence([moveObject,removeObject]) 

我有一些物理對象（Object2，B.png是類似的）。

func showObject(){ 
    let texture = SKTexture(imageNamed: "A.png") 
    object = SKSpriteNode(texture: texture) 
    object.name = "A" 
    object.position = CGPoint(x: 0, y: self.frame.width) 
    object.setScale(0.7) 
    object.zPosition = 2 
    object.run(moveAndRemove) 

    object.physicsBody = SKPhysicsBody(texture: texture, size: texture.size()) 
    object.physicsBody?.categoryBitMask = PhysicsCategory.Object 
    object.physicsBody?.collisionBitMask = PhysicsCategory.Object2 
    object.physicsBody?.contactTestBitMask = PhysicsCategory.Object2 
    object.physicsBody?.affectedByGravity = false 
    object.physicsBody?.isDynamic = true 


    addChild(object) 
} 

我已經設置刷卡識別中的touchesBegan

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) { 
    for touch in touches { 
     location = touch.location(in: self) 
     node = self.atPoint(location) 
     if node.name == "A" { 
      //node.run(SKAction.moveBy(x: 1000, y: 0, duration: 1)). //Here I try set action only to touch 
      let rightSwipe = UISwipeGestureRecognizer(target: self, action: #selector(rightSlide(_:))) 
      rightSwipe.direction = .right 
      view!.addGestureRecognizer(rightSwipe) 
     } 
     else if node.name == "B" { 
      //node.run(SKAction.moveBy(x: -1000, y: 0, duration: 1)). //Here I try set action only to touch 
      let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(leftSlide(_:))) 
      leftSwipe.direction = .left 
      view!.addGestureRecognizer(leftSwipe) 
     }else {print ("Blank space")} 
    } 

} 

func leftSlide(_ sender: UISwipeGestureRecognizer){ 
    if node.name == "B" { 
    node.run(SKAction.moveBy(x: -1000, y: 0, duration: 1)) 
    }else {print ("Bad swipe")} 
    } 
func rightSlide(_ sender: UISwipeGestureRecognizer){ 
    if node.name == "A" { 
    node.run(SKAction.moveBy(x: 1000, y: 0, duration: 1)) 
    }else {print ("Bad swipe")} 
} 

而現在的問題。對象顯示在屏幕上，當我滑過它們時，它們消失在一邊。一切工作正常，直到我刷了大約50個對象的東西，之後，每一個下一個刷卡凍結應用程序微秒，對象怪異跳下來幾個像素（更多的刷卡，更多的像素），並回到原來的位置，在這個奇怪的行爲對象後， 。更多的滑動=更大的凍結和更大的跳躍。

我嘗試關閉物理和沒有。但是，當我直接改變行動來觸摸（無需刷卡，只需觸摸），應用程序永遠正常工作。所以一定有錯誤的滑動​​識別器。或不？我檢查CPU和內存和CPU有35％和內存大約50MB。屏幕上的節點最多20. FPS爲60，但當應用程序凍結時，它會下降到58（如閃爍）。

有什麼建議嗎？如何診斷問題在哪裏？謝謝！

Answer 1

而是在的touchesBegan方法每次添加一個識別器，你應該做到以下幾點：

1）創建一個數組來存儲所有的識別，所以你以後可以輕鬆地刪除它們

2）添加識別只有一次。請注意，識別被添加到視圖，沒到現場

3）刪除它們時的情景即將從視圖中刪除

import SpriteKit 

class GameScene: SKScene,SKPhysicsContactDelegate { 


    var recognizers:[UIGestureRecognizer] = [] 

    override func didMove(to view: SKView) { 


     let leftSwipe = UISwipeGestureRecognizer(target: self, action: #selector(GameScene.leftSlide(recognizer:))) 
     leftSwipe.direction = .left 
     leftSwipe.numberOfTouchesRequired = 1 
     self.view?.addGestureRecognizer(leftSwipe) 
     recognizers.append(leftSwipe) 

     //do the same for other recognizers 

    } 

    func leftSlide(recognizer:UISwipeGestureRecognizer){ 
     print("Swipe") 
    } 

//define other methods here to handle other recognizers... 

    override func willMove(from view: SKView) { 
    super.willMove(from: view) 

    for recognizer in recognizers { 
     self.view?.removeGestureRecognizer(recognizer) 
    } 
    recognizers.removeAll() 
} 
}