如何在不同的SpriteKit场景中显示iAd横幅

这对我有用

在我的视图控制器中，我有以下代码：

// 横幅广告

var SH = UIScreen.mainScreen().bounds.height
let transition = SKTransition.fadeWithDuration(1) 
var UIiAd: ADBannerView = ADBannerView()

override func viewWillAppear(animated: Bool) {
    var BV = UIiAd.bounds.height
    UIiAd.delegate = self
    UIiAd.frame = CGRectMake(0, SH + BV, 0, 0)
    self.view.addSubview(UIiAd)
}

override func viewWillDisappear(animated: Bool) {
    UIiAd.delegate = nil
    UIiAd.removeFromSuperview()
}

func bannerViewDidLoadAd(banner: ADBannerView!) {
    var BV = UIiAd.bounds.height
    UIView.beginAnimations(nil, context: nil)
    UIView.setAnimationDuration(1) // Time it takes the animation to complete
    UIiAd.alpha = 1 // Fade in the animation
    UIView.commitAnimations()
}

func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!) {
    UIView.beginAnimations(nil, context: nil)
    UIView.setAnimationDuration(1)
    UIiAd.alpha = 0
    UIView.commitAnimations()
}

func showBannerAd() {
    UIiAd.hidden = false
    var BV = UIiAd.bounds.height

    UIView.beginAnimations(nil, context: nil)
    UIView.setAnimationDuration(1) // Time it takes the animation to complete
    UIiAd.frame = CGRectMake(0, SH - BV, 0, 0) // End position of the animation
    UIView.commitAnimations()
}

func hideBannerAd() {
    UIiAd.hidden = true
    var BV = UIiAd.bounds.height

    UIView.beginAnimations(nil, context: nil)
    UIView.setAnimationDuration(1) // Time it takes the animation to complete
    UIiAd.frame = CGRectMake(0, SH + BV, 0, 0) // End position of the animation
    UIView.commitAnimations()
}

override func viewDidLoad() {
    super.viewDidLoad()
    self.UIiAd.hidden = true
    self.UIiAd.alpha = 0

    NSNotificationCenter.defaultCenter().addObserver(self, selector: "hideBannerAd", name: "hideadsID", object: nil)
    NSNotificationCenter.defaultCenter().addObserver(self, selector: "showBannerAd", name: "showadsID", object: nil)


    let scene = GameScene()
    // Configure the view.
    let skView = self.view as SKView
    skView.showsFPS = false
    skView.showsNodeCount = false

    /* Sprite Kit applies additional optimizations to improve rendering performance */
    skView.ignoresSiblingOrder = true

    /* Set the scale mode to scale to fit the window */
    scene.scaleMode = .AspectFit
    scene.anchorPoint = CGPoint(x: 0.5, y: 0.5)
    scene.size = skView.bounds.size
    skView.presentScene(scene, transition: transition)
}

为了在我想要的场景中显示它（对我来说就是GameOver场景），我这样做是：

override func didMoveToView(view: SKView) {

    showAds()
    // Rest of your code here...
}

func showAds(){
    NSNotificationCenter.defaultCenter().postNotificationName("showadsID", object: nil)
}

基本上，这段代码会在场景外创建横幅，当横幅被加载并调用场景时，它将从底部向上滑动。切换场景时，它会再次偏移它，当您返回该场景时，它会再次从底部向上滑动。如果横幅未加载，则显示在屏幕外，因此不用担心显示白色条。此外，如果不加载以防万一，它将alpha设置为0（使其不可见）。希望这可以帮助。