SwiftUI Button作为EditButton

问题描述

如何使用 EditButton 之类的按钮？

还是如何使用按钮从列表中激活编辑模式？

还是如何从 EditButton edit / done更改名称？

How I can use a button like EditButton?
Or how I can use a button to active edit mode from list?
Or how I can change the name from EditButton "edit" / "done"?

推荐答案

下面的实现将 EditButton 的功能替换为 Button ：

The implementation below replaces EditButton's functionality with a Button:

import SwiftUI

struct ContentView: View {

    @State var isEditing = false
    @State var selection = Set<String>()

    var names = ["Karl", "Hans", "Faustao"]

    var body: some View {
        NavigationView {
            VStack {
                List(names, id: \.self, selection: $selection) { name in
                    Text(name)
                }
                .navigationBarTitle("Names")
                .environment(\.editMode, .constant(self.isEditing ? EditMode.active : EditMode.inactive)).animation(Animation.spring())
                Button(action: {
                    self.isEditing.toggle()
                }) {
                    Text(isEditing ? "Done" : "Edit")
                        .frame(width: 80, height: 40)
                }
                .background(Color.yellow)
            }
            .padding(.bottom)
        }
    }
}

#if DEBUG
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}
#endif

但是，通过这样做，选择处理需要由我们自己执行（这可能是问题，也可能不是问题）。

However, by doing so, selection handling needs to be implemented by our own (which may or may not be an issue).

目前，有关这一点的文档并不多：

Unfortunately there isn't much documentation around that at this point:https://developer.apple.com/documentation/swiftui/list/3367016-init

这篇关于SwiftUI Button作为EditButton的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！