How do I start building app with Swift UI?

To start building an app with SwiftUI, you can follow these steps:

1. Launch Xcode: Begin by opening Xcode, which is the development environment for building apps on Apple platforms.

2. Create a New Project: Choose to create a new project and select a template that uses SwiftUI. This will set up the basic structure of your app with SwiftUI as the UI framework.

3. Understand SwiftUI Views: SwiftUI is built around the concept of views, which are the building blocks of your user interface. Views in SwiftUI are declarative, compositional, and state-driven. You describe what you want to display, and SwiftUI handles the rendering.

4. Explore SwiftUI Features: SwiftUI provides a wide range of components and modifiers that allow you to create complex interfaces with less code. You can customize and fine-tune the look and feel of your app using these tools.

5. Learn from Resources: There are many resources available to help you learn SwiftUI, including tutorials, documentation, and videos. A good starting point is the SwiftUI essentials session from WWDC 2024, which provides an introduction to building apps with SwiftUI.

6. Incremental Adoption: You can start using SwiftUI in parts of your app without needing to rewrite everything. SwiftUI is designed to work alongside existing UIKit or AppKit code, allowing for gradual adoption.

For more detailed guidance, you can watch the SwiftUI essentials session from WWDC 2024, which covers the fundamentals of building apps with SwiftUI.