Xcode NSKeyedUnarchiver内存泄漏SKNode扩展

Question

After days and days of researching and trying my best, I have not found a solution to a memory leak problem. I have already tried very many ideas I found in this forum but nothing seemed to help me out.

I load my GameScene.sks with this code like everyone else does:

extension SKNode {

class func unarchiveFromFile(file:String) -> SKNode? {
    if let path = Bundle.main.path(forResource: file, ofType: "sks") {
        let url = URL(fileURLWithPath: path)
        do {
            let sceneData = try Data(contentsOf: url, options: .mappedIfSafe)
            let archiver = NSKeyedUnarchiver(forReadingWith: sceneData)
            archiver.setClass(self.classForKeyedUnarchiver(), forClassName: "SKScene")
            let scene = archiver.decodeObject(forKey: NSKeyedArchiveRootObjectKey) as! SKNode
            archiver.finishDecoding()
            return scene
        } catch {
            print(error.localizedDescription)
            return nil
        }
    } else {
        return nil
    }
}

and i am using it in my code here:

func load(level: String) {
    if let levelNode = SKNode.unarchiveFromFile(file: level) {
        mapNode = levelNode
        mapNode.name = "MapNode"
        self.worldLayer.addChild(mapNode)
        loadTileMap()
    }
}

If I leave out the line self.worldLayer.addChild(mapNode) everything works perfectly and the memory usage will never rise. But if I use it (I need it!), memory keeps climbing and climbing.

With use of Instruments it says that the line with let scene = archiver.decodeObject(forKey: NSKeyedArchiveRootObjectKey) as! SKNode let scene = archiver.decodeObject(forKey: NSKeyedArchiveRootObjectKey) as! SKNode causes all the memory leaks.

Unfortunately I do not get it and have not managed to remove my leaks.

I appreciate all help. Thanks in advance.

Answer 1

Well, I still couldn´t fix the issue but I found out some things. I can put everything I want in the scene editor (.sks) file and I will not get any memory leaks. Even Tile Maps. But as soon as I put only one tile in some tilemap memory leaks are rising very high again. How can one single tile cause all those issues?