Asynchronous issue. about xanimatedimage HOT 11 OPEN

func loadAnimatedImageWithURL(url:NSURL, completion:(animatedImage:XAnimatedImage)-> ()) {

    // Create a file to store the GIF and its corresponding data

    let fileName = url.lastPathComponent!
    let diskPath = (NSHomeDirectory() as NSString).stringByAppendingPathComponent(fileName)
    var animatedImageData = NSFileManager.defaultManager().contentsAtPath(diskPath)

    var animatedImage = XAnimatedImage()

    if animatedImageData?.bytes == nil {
        // Newly created, then download
        NSURLSession.sharedSession().dataTaskWithURL(url) { (data:NSData?, response:NSURLResponse?, error:NSError?) -> Void in
            if error == nil {
                animatedImageData = data
                animatedImage = XAnimatedImage(initWithAnimatedGIFData: animatedImageData!)
                if let _ = animatedImage.posterImage {
                    dispatch_async(dispatch_get_main_queue(), { () -> Void in
                        completion(animatedImage: animatedImage)
                    })       
                    data?.writeToFile(diskPath, atomically: true)
                }
            } else {
                print("error exists")
            }
            } .resume()
    } else {
        animatedImage = XAnimatedImage(initWithAnimatedGIFData: animatedImageData!)
            completion(animatedImage: animatedImage)   
    }
    }`

    let urlString = "https://i.imgur.com/8W2mtHB.gif"
    let url = NSURL(string: urlString)
    self.loadAnimatedImageWithURL(url!) { (animatedImage) -> () in
        self.animatedImageA = animatedImage
        self.animatedImageViewA.animatedImage = self.animatedImageA
        self.animatedImageA.debug_delegate = self.debugViewA
        self.animatedImageViewA.debug_delegate = self.debugViewA
        self.debugViewA.image = self.animatedImageA            
    }