我认为最好直接使用SwiftUI API。一般来说，我会遵循以下步骤。
1.创建名为ActivityView的SwiftUI View，它符合UIViewControllerRepresentable。这将允许您将UIActivityViewController引入SwiftUI。
1.创建一个Identifiable结构来包含你要在ActivityView中显示的文本。创建此类型将允许你使用SwiftUI sheet API并利用SwiftUI状态来通知应用何时显示新的ActivityView。
1.创建一个可选的@State变量，用于保存Identifiable文本构造。当此变量更改时，sheet API将执行回调。
1.点击按钮后，更新步骤3中设置的变量的状态。
1.使用sheet API创建将呈现给用户的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)
        }
    }
}

未来，iOS 16将提供ShareLink视图，其工作原理如下：

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

来源：https://developer.apple.com/videos/play/wwdc2022/10052/
时间代码偏移：二十五分二十八秒

要避免出现警告，请更改检索窗口场景的方式。请执行以下操作：

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)

}

您可以使用中的答案尝试以下操作：How to get rid of message " 'windows' was deprecated in iOS 15.0: Use UIWindowScene.windows on a relevant window scene instead" with AdMob banner?
请注意，您的代码对我来说是有效的，但是编译器给予了弃用警告。

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")
        }
    }
}

在iOS 15中测试，带SwiftUI

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)
        }
    }

要避免iOS 15方法过时警告，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
    }
}