小编Saj*_*ims的帖子

我有一个视图,其中我有多个标签 和一个按钮,我希望按钮绑定到右上角

当我应用添加缺失约束布局时,按钮获取不同设备的单独位置请帮我解决此问题

我有两个视图控制器 imageViewController 和 InfoViewController。我希望当用户点击 InfoViewController 中的后退按钮时显示我的广告

class imageViewController: UIViewController , GADInterstitialDelegate {
    var interstitial: GADInterstitial!
 override func viewDidLoad() {

         self.interstitial = self.createAndLoadInterstitial()
         super.viewDidLoad()
}
func createAndLoadInterstitial() -> GADInterstitial {
        let interstitial: GADInterstitial = GADInterstitial(adUnitID: "ca-app-pub-3940256099942544/4411468910")
        interstitial.delegate = self
        let request = GADRequest()
        interstitial.loadRequest(request)
        print("req sent")
        return interstitial
    }
    func interstitialDidReceiveAd(ad: GADInterstitial!) {
        if (interstitial.isReady) {
            print("ad ready")
            interstitial.presentFromRootViewController(self)
        }}
     func interstitialDidDismissScreen(interstitial: GADInterstitial) {
    } 

我应该如何通过单击后退按钮从 infoViewController 到 ImageViewCroller 来调用它。我也未能用全局变量解决这个问题，因为我是 iOS 新手