Learning states and observable objects

“States” is a primary topic in SwiftUI and declarative programming. Unlike imperative programming, where we can directly update UI elements on the screen, declarative programming works in the opposite way – we update the state, and the UI is updated according to our changes.

In fact, using states is the only way to create dynamic views in SwiftUI.

SwiftUI uses something called a property wrapper to mark certain variables as states.

Here are some of them:

• @State: To manage simple UI state
• @Binding: To allow two directional updates between the view and its children
• @ObservedObject: To share data between views
• @EnvironmentObject: To share data between views across an app

When asked about SwiftUI, these different property wrappers play a significant role in understanding how SwiftUI works and building a full-featured app with SwiftUI.

If you want to read more about managing user interface...