Present Modal fullscreem SwiftUI

问题:

how can i present a modal that will take up the fullscreen and can't be dismissed by swiping it down? Currently I am using .sheet on a view to present a modal that is dismissible.

I haven't noticed any beta changes in Xcode that changes this behavior.

Any help would be appreciated :)

回答1:

SwiftUI 1.0

I'm not sure if this what you'd want to go with but it's possible to create your own modal screen by using the ZStack and a state variable to control the hiding/showing of it.

Code

struct CustomModalPopups: View {
    @State private var showingModal = false
    
    var body: some View {
        ZStack {
            VStack(spacing: 20) {
                Text("Custom Popup").font(.largeTitle)
                
                Text("Introduction").font(.title).foregroundColor(.gray)
                
                Text("You can create your own modal popup with the use of a ZStack and a State variable.")
                    .frame(maxWidth: .infinity)
                    .padding().font(.title).layoutPriority(1)
                    .background(Color.orange).foregroundColor(Color.white)
                
                Button(action: {
                    self.showingModal = true
                }) {
                    Text("Show popup")
                }
                Spacer()
            }
            
            // The Custom Popup is on top of the screen
            if $showingModal.wrappedValue {
                // But it will not show unless this variable is true
                ZStack {
                    Color.black.opacity(0.4)
                        .edgesIgnoringSafeArea(.vertical)
                    // This VStack is the popup
                    VStack(spacing: 20) {
                        Text("Popup")
                            .bold().padding()
                            .frame(maxWidth: .infinity)
                            .background(Color.orange)
                            .foregroundColor(Color.white)
                        Spacer()
                        Button(action: {
                            self.showingModal = false
                        }) {
                            Text("Close")
                        }.padding()
                    }
                    .frame(width: 300, height: 200)
                    .background(Color.white)
                    .cornerRadius(20).shadow(radius: 20)
                }
            }
        }
    }
}

Example

(Excerpt from "SwiftUI Views" book) So here, your popup is small, but you can adjust the dimensions to make it fullscreen with the frame modifier that is on that VStack.