Show an alert with callback Swift UI
To show an alert with callback in Swift UI, you need 3 things:
- A boolean state variable that tells when to show the alert message.
- A string state variable that tells the title of the alert.
- A string state variable that tells the content of an alert message.
Video tutorial:
So let’s go ahead and create these 3 variables in your view:
@State var showAlert: Bool = false
@State var alertTitle: String = ""
@State var alertMessage: String = ""
When the variable becomes true, an alert will be displayed with a title and a message.
// main layout
VStack {
// when clicked will show the alert
Button(action: {
// set title of alert
self.alertTitle = "Error"
// set message of alert
self.alertMessage = "Please try again"
// this line will actually show the alert
self.showAlert = true
}, label: {
// text to show in button
Text("Show alert")
})
// bind showAlert here
}.alert(isPresented: $showAlert, content: {
// alert dialog
Alert(
title: Text(self.alertTitle),
message: Text(self.alertMessage),
dismissButton: .default(Text("OK")) {
// this will be called when the dismiss button is clicked
print("dismissed")
}
)
})
