The Util Designer
SwiftUI Confirmation Dialogs的使用
xcode 13.4.1, swift 5.5, iOS 15.4
2022-08-17
SwiftUI增加了一個很方便的Confirmation Dialogs向使用者詢問是否確定的對話框。
1. 配合state bool變量，和confirmationDialog向使用者詢問是否確定的對話框：
import SwiftUI

struct ConfirmationDialog : View {
    @State private var isPresentingAlert: Bool = false
    var body: some View {
        Button {
            isPresentingAlert = true
        } label: {
            Label("Delete", systemImage: "trash")
                .font(.largeTitle)
        }
        .confirmationDialog("Are you sure?", isPresented: $isPresentingAlert, actions: {
            Button("Confirm", role: .destructive) {
                print("Delete")
            }
        })

    }
}
2. 另外也可以在使用者回答時增加一些提示信息，實作如下：
import SwiftUI

struct ConfirmationDialog : View {
    @State private var isPresentingAlert: Bool = false
    var body: some View {
        Button {
            isPresentingAlert = true
        } label: {
            Label("Delete", systemImage: "trash")
                .font(.largeTitle)
        }
        .confirmationDialog("Are you sure?", isPresented: $isPresentingAlert, actions: {
            Button("Confirm", role: .destructive) {
                print("Delete")
            }
        }, message: {
            Text("You can not undo this action!")
        })
    }
}