.swipeActions 内的 .confirmationDialog 不起作用，iOS 15

问题描述

关于 iOS 15、Xcode 13；我想知道这是一个错误，未正确实施，还是计划中的非功能性功能...

对于具有调用 .swipeActions 的 .confirmationDialog 的列表，确认对话框不会显示。

参见示例：

import SwiftUI

struct ContentView: View {
    
    @State private var confirmDelete = false
    
    var body: some View {
        NavigationView {
            List{
                ForEach(1..<10) {_ in
                    Cell()
                }

                .swipeActions(edge: .trailing) {
                    Button(role: .destructive) {
                        confirmDelete.toggle()
                    } label: {
                        Label("Delete",systemImage: "trash")
                    }

                    .confirmationDialog("Remove this?",isPresented: $confirmDelete) {
                        Button(role: .destructive) {
                            print("Removed!")
                        } label: {
                            Text("Yes,Remove this")
                        }
                    }
                }
            }
        }
    }
}

struct Cell: View {
    var body: some View {
        Text("Hello")
            .padding()
    }
}

解决方法

配置错误：

视图修饰符 .confirmationDialog 需要添加到位于 .swipeActions 视图修饰符外部的视图中。它在正确配置时工作，如下所示：

import SwiftUI

struct ContentView: View {
    
    @State private var confirmDelete = false
    
    var body: some View {
        NavigationView {
            List{
                ForEach(1..<10) {_ in
                    Cell()
                }
                .swipeActions(edge: .trailing) {
                    Button(role: .destructive) {
                        confirmDelete.toggle()
                    } label: {
                        Label("Delete",systemImage: "trash")
                    }
                }
                //move outside the scope of the .swipeActions view modifier:
                .confirmationDialog("Remove this?",isPresented: $confirmDelete) {
                    Button(role: .destructive) {
                        print("Removed!")
                    } label: {
                        Text("Yes,Remove this")
                    }
                }
            }
        }
    }
}

struct Cell: View {
    var body: some View {
        Text("Hello")
            .padding()
    }
}