在 iOS 15 中使用 swiftUI 创建共享表

Question

我正在尝试创建一个共享表来共享

Text

，它在 iOS 14 中运行良好，但在 iOS 15 中它告诉我这一点

'windows' 在 iOS 15.0 中已弃用：在 a 上使用 UIWindowScene.windows 而是相关的窗口场景。

如何使用 SwiftUI 使其在 iOS 15 上运行

Button {
    let TextoCompartido = "Hola 😀 "
    
    let AV = UIActivityViewController(activityItems: [TextoCompartido], applicationActivities: nil)
    
    UIApplication.shared.windows.first?.rootViewController?.present(AV, animated: true, completion: nil)
}

Answer 1

我认为直接使用 SwiftUI API 会为您提供最好的服务。一般来说，我会遵循以下步骤。

1. 创建 SwiftUI

   View

   ，命名为

   ActivityView

   ，遵循

   UIViewControllerRepresentable

   。这将允许您将

   UIActivityViewController

   引入 SwiftUI。
2. 创建一个

   Identifiable

   结构体来包含您想要在

   ActivityView

   中显示的文本。创建此类型将允许您使用 SwiftUI sheet API 并利用 SwiftUI 状态来告诉应用程序何时显示新的

   ActivityView

   。
3. 创建一个可选的

   @State

   变量，该变量将保留您的

   Identifiable

   文本构造。当此变量发生变化时，sheet API将执行回调。
4. 点击按钮后，更新步骤 3 中设置的变量的状态。
5. 使用 sheet API 创建将呈现给您的用户的

   ActivityView

   。

下面的代码应该可以帮助您入门。

---

import UIKit
import SwiftUI

// 1. Activity View
struct ActivityView: UIViewControllerRepresentable {
    let text: String

    func makeUIViewController(context: UIViewControllerRepresentableContext<ActivityView>) -> UIActivityViewController {
        return UIActivityViewController(activityItems: [text], applicationActivities: nil)
    }

    func updateUIViewController(_ uiViewController: UIActivityViewController, context: UIViewControllerRepresentableContext<ActivityView>) {}
}

// 2. Share Text
struct ShareText: Identifiable {
    let id = UUID()
    let text: String
}

struct ContentView: View {
    // 3. Share Text State
    @State var shareText: ShareText?
    
    var body: some View {
        VStack {
            Button("Show Activity View") {
                // 4. New Identifiable Share Text
                shareText = ShareText(text: "Hola 😀")
            }
            .padding()
        }
        // 5. Sheet to display Share Text
        .sheet(item: $shareText) { shareText in
            ActivityView(text: shareText.text)
        }
    }
}

Answer 2

在 iOS 15 中使用 SwiftUI 进行测试

 func shareViaActionSheet() {
        if vedioData.vedioURL != nil {
            let activityVC = UIActivityViewController(activityItems: [vedioData.vedioURL as Any], applicationActivities: nil)
            UIApplication.shared.currentUIWindow()?.rootViewController?.present(activityVC, animated: true, completion: nil)
        }
    }

为了避免 iOS 15 方法弃用警告，请使用此扩展

public extension UIApplication {
    func currentUIWindow() -> UIWindow? {
        let connectedScenes = UIApplication.shared.connectedScenes
            .filter { $0.activationState == .foregroundActive }
            .compactMap { $0 as? UIWindowScene }
        
        let window = connectedScenes.first?
            .windows
            .first { $0.isKeyWindow }
        return window
    }
}

Answer 3

iOS 16 包含

ShareLink

视图，其工作方式如下：

Gallery(...)
   .toolbar {
      ShareLink(item: image, preview: SharePreview("Birthday Effects"))
   }

来源：https://developer.apple.com/videos/play/wwdc2022/10052/

时间码偏移：25分28秒

Answer 4

为了避免警告，请更改检索窗口场景的方式。 执行以下操作：

Button {
   let TextoCompartido = "Hola 😀 "
                                
   let AV = UIActivityViewController(activityItems: [TextoCompartido], applicationActivities: nil)
    
   let scenes = UIApplication.shared.connectedScenes
   let windowScene = scenes.first as? UIWindowScene
    
   windowScene?.keyWindow?.rootViewController?.present(AV, animated: true, completion: nil)

}

Answer 5

您可以使用以下答案尝试以下操作：如何使用 AdMob 横幅删除消息“‘windows’在 iOS 15.0 中已弃用：在相关窗口场景上使用 UIWindowScene.windows”？

请注意，您的代码对我有用，但编译器给出了弃用警告。

public extension UIApplication {
    func currentUIWindow() -> UIWindow? {
        let connectedScenes = UIApplication.shared.connectedScenes
            .filter({
                $0.activationState == .foregroundActive})
            .compactMap({$0 as? UIWindowScene})
        
        let window = connectedScenes.first?
            .windows
            .first { $0.isKeyWindow }

        return window
        
    }
}

struct ContentView: View {
    let TextoCompartido = "Hola 😀 "
    
    var body: some View {
        Button(action: {
            let AV = UIActivityViewController(activityItems: [TextoCompartido], applicationActivities: nil)
 
 UIApplication.shared.currentUIWindow()?.rootViewController?.present(AV, animated: true, completion: nil)
            
// This works for me, but the compiler give the deprecation warning
// UIApplication.shared.windows.first?.rootViewController?.present(AV, animated: true, completion: nil)
        }) {
            Text("Hola click me")
        }
    }
}

Answer 6

// iOS 16+，Swift 5

var rootViewController: UIViewController? {
    let connectedScenes = UIApplication.shared.connectedScenes
        .filter { $0.activationState == .foregroundActive }
        .compactMap { $0 as? UIWindowScene }
    let window = connectedScenes.first?.windows.first { $0.isKeyWindow }
    let rootViewController = window?.rootViewController
    return rootViewController
}

func topViewController(of viewController: UIViewController? = rootViewController) -> UIViewController? {
    if let navigationController = viewController as? UINavigationController {
        return topViewController(of: navigationController.visibleViewController)
    }
    if let tabController = viewController as? UITabBarController {
        if let selected = tabController.selectedViewController {
            return topViewController(of: selected)
        }
    }
    if let presented = viewController?.presentedViewController {
        return topViewController(of: presented)
    }
    return viewController
}