iAd 无法加载测试广告

Question

iAd根本无法加载测试广告，这让我发疯了。它只显示一个白框，不执行任何回调。这是我的所有代码：

import UIKit
import iAd
class ViewController: UIViewController, ADBannerViewDelegate {
override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.
    self.canDisplayBannerAds = true
    let adBanner = ADBannerView()
    adBanner.delegate = self
    self.view.addSubview(adBanner)
    self.view.backgroundColor = UIColor.blackColor()
}
override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

}

Answer 1

class ViewController: UIViewController, ADBannerViewDelegate {
  var adBannerView : ADBannerView
  override func viewDidLoad() {
      super.viewDidLoad()
      // Do any additional setup after loading the view, typically from a nib.
      self.canDisplayBannerAds = true
      adBannerView = ADBannerView(frame: self.view.bounds)
      adBannerView.center = CGPoint(x: adBannerView.center.x, y: view.bounds.size.height - adBannerView.frame.size.height / 2)
      adBannerView.delegate = self
      adBannerView.hidden = true
      self.view.addSubview(adBannerView)
  }
  func bannerView(banner: ADBannerView!, didFailToReceiveAdWithError error: NSError!) {
      //handle fail issue
      bannerView.hidden = true
  }
  func bannerViewDidLoadAd(banner: ADBannerView!) {
      bannerView.hidden = false 
  }
}