SheetDemoView.swift

SheetDemoView.swift

import SwiftUI

struct SheetDemoView: View {
    enum SheetMode: Identifiable {
        case first
        case second
        
        var id: Int { hashValue }
    }
    
    @State private var firstText = "First"
    @State private var secondText = "Second"
    @State var sheetMode: SheetMode?
    @State var previousSheetMode: SheetMode? = nil
    
    var body: some View {
        ZStack {
            List {
                Text(firstText)
                    .onTapGesture {
                        sheetMode = .first
                        previousSheetMode = .first
                    }
                Text(secondText)
                    .onTapGesture {
                        sheetMode = .second
                        previousSheetMode = .second
                    }
            }
        }.sheet(item: $sheetMode, onDismiss: {
            print("#### sheetMode: \(self.sheetMode)")
            print("#### sheetMode not using as sheet binding item: \(previousSheetMode)")
            guard let sheetMode = sheetMode else {
                return
            }
            
            switch sheetMode {
            case .first:
                firstText = "First(presented)"
            case .second:
                secondText = "Second(presented)"
            }
        }, content: { sheetMode in
            switch sheetMode {
            case .first:
                Text("First sheet")
            case .second:
                Text("Second sheet")
            }
        })
    }
}

struct SheetDemoView_Previews: PreviewProvider {
    static var previews: some View {
        SheetDemoView()
    }
}