Your First iOS & SwiftUI App: An App from Scratch

Feb 13 2023 · Swift 5.7, iOS 16, Xcode 14

Part 2: SwiftUI Data

13. SwiftUI State

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A key part of programming SwiftUI is state. Rather than start with the computer science definition of state, let’s go with something that might be a little more familiar: the dashboard of a car.

@State private var alertIsVisible: Bool = false

alertIsVisible = true

  .alert(
    <titleKey: ...>,
    isPresented: Binding<...>,
    actions: <...>,
    message: <...>
  )

  .alert(
    "Hello there!",

  .alert(
    "Hello there!",
    isPresented: $alertIsVisible,
    actions: <...>,
    message: <...>
  )

actions: {
  Button("Awesome!") {
    print("Alert closed")
  }
}

    message: {
      Text("This is my first alert!")
    }
  )

  .alert(
    "Hello there!",
    isPresented: $alertIsVisible,
    actions: {
      Button("Awesome!") {
        print("Alert closed")
      }
    },
    message: {
      Text("This is my first alert")
    }
  )