Question

我有两个视图控制器，一个是第二个用于创建的时间轴。在第二个视图控制器中，我有一个子视图。此子视图是SKView。现在，每次我使用它时，它会将内存使用量增加2mb（在真实设备上），但是当我放松它时内存使用量保持不变。
所以它是这样的：我开始使用12mb，然后它得到14-15mb。放松后，它保持在14-15mb左右。在第二个变为它之后，它变为17mb ......依此类推。

这是时间轴控制器中使用的代码：

@IBAction func createButtonAct(sender: AnyObject) {

    self.performSegueWithIdentifier("create", sender: self)


}

@IBAction func unwindFromCreation(segue: UIStoryboardSegue) {


}




// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    if segue.identifier == "create"{
        let vc = segue.destinationViewController as! CreateViewController
        if vc.currCountry == nil || vc.currCountry != self.currCountry{
        vc.currCountry = self.currCountry
        }

    }


}

这是创建视图控制器中的代码：

class CreateViewController: UIViewController, UITextViewDelegate {

@IBOutlet weak var bubbleView: SKView!

@IBOutlet var arrow: UIButton!

var ref: Firebase!


let categories = CatsAndColors.categories


@IBOutlet var doneButton: UIButton!

@IBOutlet var titleField: UITextField!

@IBOutlet var descriptionView: KMPlaceholderTextView!

var choosedCat: String!

var selectedCats: NSMutableArray!

var currCountry:String!

var tap: UITapGestureRecognizer!

override func viewWillAppear(animated: Bool) {
    super.viewWillAppear(true)

    UIApplication.sharedApplication().statusBarStyle = .Default
    UIView.animateWithDuration(0.5, animations: { () -> Void in
        self.arrow.transform = CGAffineTransformMakeRotation(3.14159)
    })



    titleField.addTarget(self, action: "textFieldDidChange:", forControlEvents: UIControlEvents.EditingChanged) 

    titleField.addTarget(self, action: "textFieldDidBegin:", forControlEvents: UIControlEvents.EditingDidBegin)

    titleField.addTarget(self, action: "textFieldDidEnd:", forControlEvents: UIControlEvents.EditingDidEnd)
    // the targets get removed in viewWillDisappear
    selectedCats = NSMutableArray()

}



override func viewDidLoad() {
    super.viewDidLoad()

    ref = Firebase(url: "https://blabber2.firebaseio.com")

    self.doneButton.enabled = false

    doneButton.setBackgroundImage(UIImage(named: "Done button inactive"), forState: .Disabled)

    doneButton.setTitleColor(UIColor(netHex: 0xF6F6F6), forState: .Disabled)

    doneButton.setTitleColor(UIColor.whiteColor(), forState: .Normal)

    self.setupBubbles()

    self.descriptionView.delegate = self

}

func setupBubbles(){



    let floatingCollectionScene = ChooseBubblesScene(size: bubbleView.bounds.size)

    // floatingCollectionScene.scaleMode = .AspectFit


    /*let statusBarHeight = CGRectGetHeight(UIApplication.sharedApplication().statusBarFrame)
    let titleLabelHeight = CGRectGetHeight(self.tibleLabel.frame)*/

    bubbleView.presentScene(floatingCollectionScene)



    for (category, color) in categories {

        let node = ChooseBubbleNode.instantiate()
        node!.vc = self
        node!.fillColor = SKColor(netHex: color)
        node!.strokeColor = SKColor(netHex: color)
        node!.labelNode.text = category

        floatingCollectionScene.addChild(node!)

    }


}
...

catsAndColors结构看起来像这样：

struct CatsAndColors{

static var categories = ["Crime":0x5F5068, "Travel":0xFBCB43, "Religion":0xE55555, "Tech":0xAF3151, "Economy":0x955BA5, "Games":0xE76851, "Climate":0x6ED79A, "Books":0xE54242, "History":0x287572, "Clothes":0x515151, "Sports":0x4AB3A7, "Food":0xD87171, "Politics":0x5FA6D6, "Music":0xDD2E63, "Tv-shows":0x77A7FB]

 }

Answer 1

也许您已在视图控制器之间创建了某种保留周期如果两个视图控制器都相互拥有引用，则尝试将其中一个引用声明为weak。

有关主题的更多信息，请阅读Resolving Strong Reference Cycles Between Class Instances。

Answer 2

我解决了这个问题，它是sknode文件中的强引用。

感谢您的回答。

每个segue到模态vc的内存使用量都会增加

2 个答案: