How to present an Alert with swiftUI

Question

In SwiftUI I discovered the Alert type. But I wonder how to show it with the presentation method.

Initializing an Alert is pretty easy. But how to use the binding?

struct ContentView : View {     var body: some View {         Button(action: {             // Don't know how to use the `binding` below             presentation(binding, alert: {                 Alert(title: Text("Hello"))             })         }, label: {             Text("asdf")         })     } } 

The binding is of type Binding<Bool>

Answer 1

.presentation() was actually deprecated in Beta 4. Here is a version that currently works with the .alert() Modifier.

struct ContentView: View {     @State var showsAlert = false     var body: some View {         Button(action: {             self.showsAlert.toggle()         }) {             Text("Show Alert")         }         .alert(isPresented: self.$showsAlert) {             Alert(title: Text("Hello"))         }     } } 

Answer 2

You can use a @State variable as the binding. Alternatively you can use a @EnvironmentObject variable that uses a BindableObject.

I think you need to call presentation on the root View to get it to work, adding it to a Stack, Group, etc. doesn't seem to work.

This snippet seems to do the trick. Note that @State variable is set to false after the alert is dismissed.

struct ContentView: View {      @State var showsAlert = false      var body: some View {         Button(action: {             self.showsAlert = true         }, label: {             Text("asdf")         }).presentation($showsAlert, alert: {             Alert(title: Text("Hello"))         })     } }