Question

我的Swiperecognizer存在一个奇怪的问题。

我在屏幕上产生了对象。

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])

我有一些物理对象（Object2，B.png类似）。

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)
}

我在touchesBegan中设置了滑动识别器

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")}
}

现在问题。对象显示在屏幕上，当我在它们上面滑动时，它们会消失到一边。一切正常，直到我擦掉大约50个物体的东西，之后每个下一个滑动冻结应用程序微秒，对象怪异地向下跳几个像素（更多滑动，更多像素）并回到它们的原始位置，然后在这个奇怪的行为对象滑动之后。更多滑动=更大的冻结和更大的跳跃。

我尝试关闭物理，什么都没有。但是，当我直接将动作更改为触摸（无需滑动，只需触摸）时，应用程序将永远正常工作。所以必须有错误的滑动识别器。或不？我检查CPU和MEMORY，CPU有35％，内存大约50MB。屏幕上的节点最多20. FPS为60，但当应用程序冻结时，它会降至58（如闪烁）。

有什么建议吗？如何诊断问题在哪里？谢谢！

Answer 1

您不应每次在touchesBegan方法中添加识别器，而应执行以下操作：

1）创建一个数组来存储所有识别器，以便以后轻松删除它们

2）仅添加一次识别器。请注意，识别器将添加到视图中，而不是添加到场景中

3）当场景即将从视图中删除时删除它们

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()
}
}

UISwipeGestureRecognizer的奇怪行为 - 微冻应用程序

1 个答案: