Using ForEach, the view on the interface shows the same two sets about popovers HOT 6 CLOSED

@State var present = false /// you have 1 single property for all the popovers!

struct ContentView: View {
    @State var present = false

    var body: some View {
        VStack(spacing: 80) {
            ForEach(0..<3) { index in
                Button {
                    present = true /// when you set this to `true`, all the popovers will present
                } label: {
                    Text("Button #\(index)")
                }
                .popover(present: $present) { /// all of the popovers use the same property
                    Text("Popover #\(index)")
                        .padding()
                        .background(Color.blue)
                        .cornerRadius(16)
                }
            }
        }
    }
}

struct ContentView: View {
    @State var selection: String? /// keeps track of which popover is being presented.

    var body: some View {
        VStack(spacing: 80) {
            ForEach(0..<3) { index in
                Button {
                    selection = "\(index)" /// set `selection` to the current iteration's tag
                } label: {
                    Text("Button #\(index)")
                }
                
                /// will be presented when `selection` == `tag`
                .popover(selection: $selection, tag: "\(index)") {
                    Text("Popover #\(index)")
                        .padding()
                        .background(Color.blue)
                        .cornerRadius(16)
                }
            }
        }
    }
}

.popover(present: $present) {
    PopoverView(sk_current: $sk_current)
}

/// ...

struct PopoverView: View {
    @Binding var sk_current: WhateverSK_CurrentIs
    
    var body: some View {
        VStack(spacing: CGFloat.bl_4.double) {
                            Text("📅 日历")
                                .modifier(SK_16(textColor: Color.t_p_c, weight: .bold))
                            DatePicker("",
                                       selection: $sk_current.selectedDate, displayedComponents: .date)
                                .datePickerStyle(GraphicalDatePickerStyle())
                                .accentColor(.blue_c)
                        }
                        .frame(maxWidth: 320)
                        .padding(.top, CGFloat.bl_4.custom(num: 5))
                        .padding(.horizontal, CGFloat.bl_4.custom(num: 5))
                        .background(.bar)
                        .cornerRadius(12)
                        .shadow(radius: 20)
                        .scaleEffect(expanding ? 0.95 : 1)
    }
}