Learn SWIFTUI with Real Code Examples

SwiftUI enables building native Apple apps using a declarative syntax.

It integrates seamlessly with Swift and Apple’s ecosystem, providing live previews in Xcode.

Ideal for developers focusing on iOS/macOS apps who want fast, maintainable, and modern UI development.

Swift-based declarative UI components

State-driven rendering with @State, @Binding, @ObservedObject

Integration with Combine for reactive programming

Support for Dark Mode, localization, accessibility

Previews and canvas in Xcode for real-time feedback

Views are Swift structs conforming to `View` protocol

Use @State, @Binding, @ObservedObject for reactive state

Modifiers change view properties (e.g., `.padding()`, `.background()`)

Combine used for asynchronous/reactive updates

Previews provide real-time feedback in Xcode canvas

App/ - main entry point and app lifecycle

Views/ - reusable SwiftUI view components

Models/ - data models

Assets/ - images, colors, fonts

Supporting files - Info.plist, AppDelegate, SceneDelegate

Create SwiftUI project in Xcode

Define Views and layout using declarative syntax

Manage state with property wrappers

Test UI with Xcode previews and simulators

Run app on device and optimize performance

Beginner: simple forms and static views

Intermediate: dynamic data-driven UI using @State and @ObservedObject

Advanced: integrating Combine and animations

Expert: bridging SwiftUI with UIKit/AppKit

Community: contributing SwiftUI packages and components

SwiftUI vs UIKit: declarative vs imperative UI building

SwiftUI vs React Native: native Apple-only vs cross-platform JS

SwiftUI offers seamless integration with Apple ecosystem

UIKit may still be needed for complex legacy components

SwiftUI emphasizes speed, maintainability, and live previews

2019 – SwiftUI introduced at WWDC

2020 – SwiftUI 2.0 added improved controls, widgets, and Lazy stacks

2021 – SwiftUI 3.0 expanded macOS and iPadOS support

2022–2023 – SwiftUI performance and API enhancements

2024–2025 – Ongoing updates with latest iOS/macOS features

View: a SwiftUI UI element conforming to View protocol

Modifier: methods that change view properties

@State/@Binding: property wrappers for state management

Combine: reactive framework for data streams

Preview: live rendering of SwiftUI view in Xcode