How to create popup in SwiftUI ?

From iOS 16 onwards you can create a popup with inbuilt Apple’s API. i.e. .presentationDetents(..

Here i have passed values .presentationDetents([.medium, .large]) Means it will show as medium height first then by dragging it it will cover the full height.

struct ContentView: View {
    @State var isPresentedPopUp: Bool = false
    var body: some View {
        Button {
            self.isPresentedPopUp.toggle()
        } label: {
            Text("Present half sheet")
        }
        .sheet(isPresented: $isPresentedPopUp) {
            PopUpView()
                .presentationDetents([.medium, .large])
        }
    }
}

struct PopUpView: View {
    var body: some View {
        Text("Pop Up View")
    }
}

Setting of custom height of Popup –

    .presentationDetents([.height(250)]) // use Your value here

Percentage height of view – use .fraction(0.8)

.presentationDetents([.fraction(0.8)]) // 80 Percent of view height

Set Custom Indents

You can create your own detents so that you can set Min height & Max Height of the Popup. See the FromDetent & ToDetent

struct ContentView: View {
    @State var isPresentedPopUp: Bool = false
    var body: some View {
        Button {
            self.isPresentedPopUp.toggle()
        } label: {
            Text("Present half sheet")
        }
        .sheet(isPresented: $isPresentedPopUp) {
            PopUpView()
                .presentationDetents([.custom(FromDetent.self), .custom(ToDetent.self)])
        }
    }
}

struct PopUpView: View {
    var body: some View {
        Text("Pop Up View")
    }
}

struct FromDetent: CustomPresentationDetent {
    static func height(in context: Context) -> CGFloat? {
        return 100
    }
}

struct ToDetent: CustomPresentationDetent {
    static func height(in context: Context) -> CGFloat? {
        return 200
    }
}

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