怀疑关闭的保留周期 [英] Retain cycle suspected in closure

问题描述

我怀疑我在GameScene类中使用以下功能来管理加速度计的输入时，以下功能使我的场景在过渡到另一个场景时不会取消初始化:

I suspect that the following function, which I use in my GameScene class in order to manage the accelerometer's input, is keeping my scene from deinitializing when I transition to another scene:

class GameScene: SKScene {
    let motionManager = CMMotionManager()
    var xAcceleration = CGFloat(0)
    // Some stuff
    // override func didMove(to: ....

    func setupCoreMotion() {
        motionManager.accelerometerUpdateInterval = 0.2
        let queue = OperationQueue()
        motionManager.startAccelerometerUpdates(to: queue,
                                                withHandler:
            {
                accelerometerData, error in
                guard let accelerometerData = accelerometerData else {
                    return
                }
                let acceleration = accelerometerData.acceleration
                self.xAcceleration = (CGFloat(acceleration.x) * 0.75) +
                    (self.xAcceleration * 0.25)
        })
    }
}

可能是由于自我捕获，但是如果是这样，我不知道将"[未拥有的自我]"放入捕获列表的位置.

It may be because of the self capture, but if that's the case, I have no clue where to put the "[unowned self] in" capture list.

推荐答案

您应该像这样将其放在accelerometerData, error in之前[unowned self] accelerometerData, error in

You should put it before accelerometerData, error in like this [unowned self] accelerometerData, error in

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