Multiple sheet(isPresented:) doesn't work in SwiftUI

问题

I have this ContentView with two different modal views, so I'm using sheet(isPresented:) for both, but as it seems only the last one gets presented. How could I solve this issue? Or is it not possible you use multiple sheets on a view in SwiftUI?

struct ContentView: View {

    @State private var firstIsPresented = false
    @State private var secondIsPresented = false

    var body: some View {

        NavigationView {
            VStack(spacing: 20) {
                Button("First modal view") {
                    self.firstIsPresented.toggle()
                }
                Button ("Second modal view") {
                    self.secondIsPresented.toggle()
                }
            }
            .navigationBarTitle(Text("Multiple modal view problem"), displayMode: .inline)
            .sheet(isPresented: $firstIsPresented) {
                    Text("First modal view")
            }
            .sheet(isPresented: $secondIsPresented) {
                    Text("Only the second modal view works!")
            }
        }
    }
}

The above code compiles without warnings (Xcode 11.2.1).

回答1:

Please try below code

enum ActiveSheet {
   case first, second
}

struct ContentView: View {

    @State private var showSheet = false
    @State private var activeSheet: ActiveSheet = .first

    var body: some View {

        NavigationView {
            VStack(spacing: 20) {
                Button("First modal view") {
                    self.showSheet = true
                    self.activeSheet = .first
                }
                Button ("Second modal view") {
                    self.showSheet = true
                    self.activeSheet = .second
                }
            }
            .navigationBarTitle(Text("Multiple modal view problem"), displayMode: .inline)
            .sheet(isPresented: $showSheet) {
                if self.activeSheet == .first {
                    Text("First modal view")
                }
                else {
                    Text("Only the second modal view works!")
                }
            }
        }
    }
}

回答2:

Can also add the sheet to an EmptyView placed in the view's background. This can be done multiple times:

  .background(EmptyView()
        .sheet(isPresented: isPresented, content: content))

回答3:

You're case can be solved by the following (tested with Xcode 11.2)

var body: some View {

    NavigationView {
        VStack(spacing: 20) {
            Button("First modal view") {
                self.firstIsPresented.toggle()
            }
            .sheet(isPresented: $firstIsPresented) {
                    Text("First modal view")
            }
            Button ("Second modal view") {
                self.secondIsPresented.toggle()
            }
            .sheet(isPresented: $secondIsPresented) {
                    Text("Only the second modal view works!")
            }
        }
        .navigationBarTitle(Text("Multiple modal view problem"), displayMode: .inline)
    }
}

来源：https://stackoverflow.com/questions/58837007/multiple-sheetispresented-doesnt-work-in-swiftui

标签

swift

modal-dialog

swiftui