SwiftUI 界面跳转(push)

push

// TextView
struct TextView: View {
    
    var body: some View {
        NavigationView {
            NavigationLink(destination: CircleImage(), label: {
                Text("push")
            })
            .navigationBarTitle(Text("mark"))
        }
    }
}

struct TextView_Preview: PreviewProvider {
    static var previews: some View {
        TextView()
    }
}



// CircleImage
struct CircleImage: View {
    
    @State var value:CGFloat = 0.5
    
    var body: some View {
        VStack {
            Slider(value: $value)
        }
    }
}

struct CircleImage_Preview: PreviewProvider {
    static var previews: some View {
        CircleImage()
    }
}

struct PageView: View {
    
    private let messages = [
        "Hello",
        "How are you?"
    ]
    
    var body: some View {
        NavigationView {
            List(messages, id: \.self, rowContent: { me in
                NavigationLink(destination: DetailsView(message: me)) {
                    Text(me)
                }
            })
            .navigationBarTitle("Messages")
        }
    }
}

struct DetailsView: View {
    let message: String

    var body: some View {
        VStack {
            Text(message)
                .font(.largeTitle)
        }
    }
}

struct PageView_Preview: PreviewProvider {
    
    static var previews: some View {
        PageView()
    }
}

struct PageView: View {
    
    @State var selection: Int? = nil
    
    var body: some View {
        NavigationView {
            VStack {
                NavigationLink(destination: Details(), tag: 1, selection: $selection) {
                    Button("Press me") {
                        self.selection = 1
                    }
                }
            }
        }
    }
}

struct Details: View {
    @Environment(\.presentationMode) var presentation

    var body: some View {
        Group {
            Text("Details")
            Button("pop back") {
                self.presentation.wrappedValue.dismiss()
            }
        }
    }
}

struct PageView_Preview: PreviewProvider {
    
    static var previews: some View {
        PageView()
    }
}