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SwiftUI Academy · Lesson

Declaring @State Properties

Add @State to hold mutable view-local data.

Meet the @State Wrapper

You declare mutable view-local data by marking a property with @State. This property wrapper tells SwiftUI to store and watch the value for you. 🏷️

@State private var count = 0

Always Give It a Default

A @State property needs an initial value right where you declare it. SwiftUI uses it to create the storage the first time the view appears.

@State private var isOn = false

All lessons in this course

  1. Why Views Need State
  2. Declaring @State Properties
  3. Building a Tap Counter
  4. Toggling Visibility with State
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