ios - 让 actionSheet 打开新 View (SwiftUI) 时出现问题

Question

我正在尝试使用不同的 View 编写基本应用程序。主屏幕上有一个按钮，可以打开另一个 View 。该 View 位于另一个名为 ThoughtsView.swift 的 swift 文件中，其结构为 ThoughtsView()。

我的主视图代码:

struct NewThoughtView: View {

    @State var thought = ""
    @State var modalIsPresented = false

    var body: some View {

        NavigationView {

            VStack {

                Spacer()

                TextField("Type your thought...", text: $thought)

                Spacer()

                Button(action: /*@START_MENU_TOKEN@*/{}/*@END_MENU_TOKEN@*/) {
                    Text("Ok")
                }

                Spacer()
                Spacer()


                // Thought Library Button

                Button(action: {self.modalIsPresented = true}) {
                    Text("Review your thoughts")
                }
            }
            .navigationBarTitle(Text("Skillful"))

        }
        .actionSheet(isPresented: $modalIsPresented) {

            ThoughtsView(thoughtStore: ThoughtStore())
        }

    }
}

struct NewThoughtView_Previews: PreviewProvider {
    static var previews: some View {
        NewThoughtView()
    }
}

它抛出以下错误:

无法将“ThoughtsView()”类型的值转换为闭包结果类型“ActionSheet”

Screenshot of error

这是包含 ThoughtsView 的 swift 文件，我希望将其放入新的操作表中:

struct ThoughtsView: View {

    var thoughtStore: ThoughtStore


    var body: some View {



        List(thoughtStore.thoughts, id: \.id) {thought in
            Text(thought.thoughtName)
        }
    }
}

struct ThoughtsView_Previews: PreviewProvider {
    static var previews: some View {
        ThoughtsView( thoughtStore: ThoughtStore() )
    }
}

如果错误在这里，sceneDelegate的代码:

import UIKit
import SwiftUI

class SceneDelegate: UIResponder, UIWindowSceneDelegate {

    var window: UIWindow?


    func scene(_ scene: UIScene, willConnectTo _: UISceneSession, options _: UIScene.ConnectionOptions) {
        // Use this method to optionally configure and attach the UIWindow `window` to the provided UIWindowScene `scene`.
        // If using a storyboard, the `window` property will automatically be initialized and attached to the scene.
        // This delegate does not imply the connecting scene or session are new (see `application:configurationForConnectingSceneSession` instead).



        // Use a UIHostingController as window root view controller.
        if let windowScene = scene as? UIWindowScene {
            let window = UIWindow(windowScene: windowScene)

            // Create the SwiftUI view that provides the window contents.
                   let contentView = NewThoughtView()

            window.rootViewController = UIHostingController(rootView: contentView)
            self.window = window
            window.makeKeyAndVisible()
        }
    }

    func sceneDidDisconnect(_ scene: UIScene) {
        // Called as the scene is being released by the system.
        // This occurs shortly after the scene enters the background, or when its session is discarded.
        // Release any resources associated with this scene that can be re-created the next time the scene connects.
        // The scene may re-connect later, as its session was not neccessarily discarded (see `application:didDiscardSceneSessions` instead).
    }

    func sceneDidBecomeActive(_ scene: UIScene) {
        // Called when the scene has moved from an inactive state to an active state.
        // Use this method to restart any tasks that were paused (or not yet started) when the scene was inactive.
    }

    func sceneWillResignActive(_ scene: UIScene) {
        // Called when the scene will move from an active state to an inactive state.
        // This may occur due to temporary interruptions (ex. an incoming phone call).
    }

    func sceneWillEnterForeground(_ scene: UIScene) {
        // Called as the scene transitions from the background to the foreground.
        // Use this method to undo the changes made on entering the background.
    }

    func sceneDidEnterBackground(_ scene: UIScene) {
        // Called as the scene transitions from the foreground to the background.
        // Use this method to save data, release shared resources, and store enough scene-specific state information
        // to restore the scene back to its current state.
    }


}

我做错了什么？提前致谢...

Answer 1

我只是更改您的代码，点击按钮打开您的 View 。我假设您正在尝试这样做。

struct ContentView: View {

@State var thought = ""
@State var modalIsPresented = false

var body: some View {
    NavigationView {
        VStack {
            Spacer()
            TextField("Type your thought...", text: $thought)
            Spacer()
            Button(action: /*@START_MENU_TOKEN@*/{}/*@END_MENU_TOKEN@*/) {
                Text("Ok")
            }
            Spacer()
            Spacer()

            // Thought Library Button

            Button(action: {self.modalIsPresented = true}) {
                Text("Review your thoughts")
            }.sheet(isPresented: $modalIsPresented, content: {
                 ThoughtsView(thoughtStore: ThoughtStore())
            })
        }
        .navigationBarTitle(Text("Skillful"))
    }
    /*.actionSheet(isPresented: $modalIsPresented) {

        ThoughtsView()
    }*/
}

}