ios - 切换到新场景时内存会增加

Question

我有一个通过按下按钮调用新场景的游戏。当你在一个新的场景中点击发送相应的图片。当您返回游戏 map 时，内存总是增加 30 MB。我不明白最强链接在哪里。仪器无法检测泄漏。对不起我的英语。请帮助我。

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    for touch: AnyObject in touches {

        let location = touch.location(in: self)

        for i in 0...3 {


            if  childNode(withName: "button\(i)")!.isHidden == false && childNode(withName: "button\(i)")!.contains(location)  {
                buttonOfBattlefield = childNode(withName: "button\(i)")
                }
            }


                switch buttonOfBattlefield?.name {
                case "button0"?:
                    battlefieldName = "A"
                case "button1"?:
                    battlefieldName = "B"
                case "button2"?:
                    battlefieldName = "C"
                case "button3"?:
                    battlefieldName = "D"

                default:
                    break
                }

            if battlefieldName != nil {
                let myScene = GameScene(size: self.size , battlefield: battlefieldName!)
                myScene.scaleMode = self.scaleMode
                let reveal = SKTransition.fade(withDuration: 2.0)
                self.view?.presentScene(myScene, transition: reveal)


        }

    }
}

Answer 1

本质上，可能有很多因素会导致您的游戏内存增加。

我尽力帮助您进行一些有用的更正。

谈到自定义协议(protocol)，您可以通过在行尾添加 class 来打破强引用，并向委托(delegate)声明 weak var:

protocol ResumeBtnSelectorDelegate: class {
    func didPressResumeBtn(resumeBtn:SKSpriteNode)
}

weak var resumeBtnDelegate:ResumeBtnSelectorDelegate?
...

Speaking about completion 可能是对 self 的强引用，所以你可以像这个例子那样做:

self.launchVideo(completion: {
   [weak self] success in
   guard let strongSelf = self else { return }
   //self.showMyVideo()
   strongSelf.showMyVideo()
}

同样的事情来运行 Action block :

let exp = SKAction.run {
          [weak self] in
          guard let strongSelf = self else { return }
          strongSelf.getExplosion(percentageDimension: 15,type: 0,position: enemy.position)
}

如果您在 objective-c 中使用第三方库，您可能还需要删除那里的强引用:

__weak __typeof__(self) weakSelf = self;
SKAction *sequence = [SKAction sequence:@[[SKAction followPath:_ascentPath duration:1.5], [SKAction runBlock:^(void){[weakSelf explode];}]]];
[self runAction:sequence];
}

如果你有一些观察者试图删除它，NSTimers 与 willMoveFromView 方法相同。

override func willMove(from view: SKView) {
   //remove UIKit objects, observers, timers..
}