如何在 SwiftUI 中从子视图呈现 GoogleRewardAd？

如何解决如何在 SwiftUI 中从子视图呈现 GoogleRewardAd？

我一直在开发图像选择器应用程序，该应用程序将在图像处理过程中显示奖励广告。我在展示奖励广告时遇到了问题。当我从照片中选择图像并点击过程时，奖励广告将出现在 ProcessView 后面。流程如下。

1. 主页视图

   struct HomeView：视图{

    @State var showImagePicker = false
    @State var showSheet = false
    @State var forVideo: Bool = false
    @State var forImage: Bool = false
    @State var image = UIImage(systemName: "photo.on.rectangle.angled")!
   
    var body: some View {
   
        vstack {
   
            Image(uiImage: image)
                .frame(width: 200,height: 200)
   
            Button(action: {
   
                self.showImagePicker = true
                self.showSheet = true
   
            },label: {
   
                Text("Pick Image")
            })
   
            NavigationLink(
                destination: ProcessView(),label: {
                    Text("Process Image")
                })
   
        }
        .sheet(isPresented: $showImagePicker){
   
            ImagePicker(isPresented: $showImagePicker,forVideo: $forVideo,needsCamera: $forImage,image: $image)
   
        }
    }
   

   }

2. 图像选择器

   struct ImagePicker : UIViewControllerRepresentable {

    @Binding var isPresented: Bool
    @Binding var forVideo: Bool
    @Binding var needsCamera: Bool
    @Binding var image: UIImage
   
    func makeUIViewController(context: Context) -> some UIViewController {
        let controller = UIImagePickerController()
        if self.needsCamera {
            controller.sourceType = .camera
            controller.cameraDevice = .front
   
            let tabBarHeight = controller.view.subviews[1].frame.size.height
            let overlay = getoverlay(frame: controller.view.frame,tabBarHeight: tabBarHeight)
            controller.cameraOverlayView = overlay
   
        } else {
            controller.sourceType = .photoLibrary
        }
   
        if self.forVideo {
            controller.mediaTypes = [kUTTypeMovie as String]
   
            controller.allowsEditing = true
            controller.videoQuality = .type640x480
        }
        controller.delegate = context.coordinator
        return controller
    }
   
    func getoverlay(frame: CGRect,tabBarHeight: CGFloat) -> UIView {
        let sampleMask = UIView()
        sampleMask.frame = frame
        sampleMask.frame.origin.y = sampleMask.frame.origin.y + tabBarHeight
        sampleMask.frame.size.height = sampleMask.frame.size.height - sampleMask.frame.size.height/3
        sampleMask.backgroundColor =  UIColor.black.withAlphaComponent(0.3)
   
        let maskLayer = CALayer()
        maskLayer.frame = sampleMask.bounds
        let circleLayer = CAShapeLayer()
        circleLayer.frame = CGRect(x:0,y:0,width: sampleMask.frame.size.width,height: sampleMask.frame.size.height)
        let finalPath = UIBezierPath(roundedRect: CGRect(x:0,height: sampleMask.frame.size.height),cornerRadius: 0)
        let side = sampleMask.frame.size.width - sampleMask.center.x/3
        let circlePath = UIBezierPath(ovalIn: CGRect(x:sampleMask.center.x - side/2,y:sampleMask.frame.height/2 - side/2,width: side,height: side))
        finalPath.append(circlePath.reversing())
        circleLayer.path = finalPath.cgPath
        circleLayer.borderColor = UIColor.white.withAlphaComponent(1).cgColor
        circleLayer.borderWidth = 1
        maskLayer.addSublayer(circleLayer)
   
        sampleMask.layer.mask = maskLayer
   
        return sampleMask
    }
   
    func makeCoordinator() -> ImagePicker.Coordinator {
        return Coordinator(parent: self)
    }
   
    class Coordinator : NSObject,UIImagePickerControllerDelegate,UINavigationControllerDelegate {
        let parent: ImagePicker
        init(parent: ImagePicker) {
            self.parent = parent
        }
        func imagePickerController(_ picker: UIImagePickerController,didFinishPickingMediawithInfo info: [UIImagePickerController.InfoKey : Any]) {
   
            if let selectedImageFromPicker = info[.originalImage] as? UIImage {
   
                self.parent.image = selectedImageFromPicker
                self.parent.isPresented = false
   
            } else if let videoPath = info[UIImagePickerController.InfoKey.mediaURL] as? URL {
   
            }
        }
   
    }
   
    func updateUIViewController(_ uiViewController: UIViewControllerType,context: Context) {
   
    }
   

   }

3. 流程视图

   struct ProcessView：视图{

    let rewardedAd = GADRewardedAd(adUnitID: "ca-app-pub-3940256099942544/1712485313")
   
    var body: some View {
   
        vstack {
            Text("Process Image")
        }
        .onAppear(perform: {
   
            rewardedAd.load(GADRequest()) { error in
                if let error = error {
   
                    print("   Error loading Ad. \(error)")
   
                } else {
   
                    if(rewardedAd.isReady){
   
                        if let root = UIApplication.shared.windows.last?.rootViewController {
                            self.rewardedAd.present(fromrootViewController: root,delegate: RewardedDelegate(parent: self))
                        }
   
                    }else{
   
                    }
                }
            }
        })
    }
   

   }

   class RewardedDelegate: NSObject,GADRewardedAdDelegate { 让父级：ProcessView

    init(parent: ProcessView) {
        self.parent = parent
    }
   
    func rewardedAd(_ rewardedAd: GADRewardedAd,userDidEarn reward: GADAdReward) {
   
    }
   
    func rewardedAdDiddismiss(_ rewardedAd: GADRewardedAd) {
   
    }
   

   }

有人遇到同样的问题吗？