ios - EXC_BAD_ACESS 在 iOS8 上的 SpriteKit 中崩溃

Question

我在尝试更改 SKSpriteNode 的位置时遇到了一个非常奇怪的崩溃。此崩溃发生在 iOS8 而不是 iOS9。

// if the powerup is full, spawn the icon on screen
if orangeBallsCollected == numberOfBallsRequiredToActivatePowerup {

    // add the powerup icon to the array of powerupiconsonscreen
    powerupIconsOnScreen.append(fewerColorsPowerupIcon)

    // set the lighting mask of the powerup icon so that we know what positon it is onscreen for alter
    fewerColorsPowerupIcon.lightingBitMask = UInt32(powerupIconsOnScreen.count - 1)

    // remove the ball from its current parent
    fewerColorsPowerupIcon.removeFromParent()

    print(fewerColorsPowerupIcon, fewerColorsPowerupIcon.parent, fewerColorsPowerupIcon.physicsBody, fewerColorsPowerupIcon.superclass)

    // place the ball of the screen so that we can bring it on later
    fewerColorsPowerupIcon.position = CGPointMake((width * -0.1) , (height * -0.1))

    // set the size of the icon
    fewerColorsPowerupIcon.xScale = scaleFactor
    fewerColorsPowerupIcon.yScale = scaleFactor

    // add it the scene
    self.addChild(fewerColorsPowerupIcon)

    // animate it moving down to the first avaliable position
    let animation = SKAction.moveTo(CGPoint(x: width * 0.1, y: height * 0.1), duration: 0.5)

    // run the animation!
    fewerColorsPowerupIcon.runAction(animation)

    // activate the poweurp
    activateFewerColors()

}

当我尝试设置位置 (fewerColorsPowerupIcon.position) 时发生崩溃，这是崩溃消息:

Thread 1: EXC_BAD_ACCESS(code=EXC_I386_GPFLT)

如果我在设置节点位置后放置 .removeFromParent() 代码段，仍然会发生此崩溃。

Answer 1

我认为如果你删除 Sprite ，你将无能为力。

所以尝试这样做:

let spriteCopy =  fewerColorsPowerupIcon.copy()

// place the ball of the screen so that we can bring it on later
spriteCopy.position = CGPointMake((width * -0.1) , (height * -0.1))

// set the size of the icon
spriteCopy.xScale = scaleFactor
spriteCopy.yScale = scaleFactor

// add it the scene
self.addChild(spriteCopy)

或者您可以先在场景中添加，然后更改属性:

// remove the ball from its current parent
fewerColorsPowerupIcon.removeFromParent()

// add it the scene
self.addChild(fewerColorsPowerupIcon)

 // place the ball of the screen so that we can bring it on later
fewerColorsPowerupIcon.position = CGPointMake((width * -0.1) , (height * -0.1))

// set the size of the icon
fewerColorsPowerupIcon.xScale = scaleFactor
fewerColorsPowerupIcon.yScale = scaleFactor