SwiftUI T-1

1. What is SwiftUI?

SwiftUI is a declarative framework for building user interfaces across all Apple platforms, including iOS, macOS, watchOS, and tvOS.

Key Characteristics of SwiftUI:-

Declarative Syntax:

Developers describe what the UI should do, rather than how to do it.

For example, you write code to state that a button should display text and perform an action when tapped.

Button("Click Me") {
    print("Button Tapped")
}

Live Previews:

Xcode provides real-time previews of the UI while coding.

This allows developers to see immediate results without running the app.

Cross-Platform:

A single SwiftUI codebase can run on iOS, macOS, watchOS, and tvOS, making it easier to create consistent experiences across Apple devices.

State-Driven UI:

UI components automatically update when the underlying state changes.

@State private var count = 0

Button("Increment") {
    count += 1
}
Text("Count: \(count)")

How State-Driven UI Works in SwiftUI

In SwiftUI, state is managed using special property wrappers, such as:

1. @State: Manages local, mutable state for a single view.
2. @Binding: Passes state from a parent view to a child view.