What is ContentView in Swift?

In SwiftUI, ContentView is often the initial view that's presented to the user when the app launches. When you create a new SwiftUI project in Xcode, the template automatically provides a ContentView struct as a starting point for your app's user interface.

The ContentView struct conforms to the View protocol, which is the fundamental building block for user interface components in SwiftUI. Here's what the default ContentView might look like when you create a new SwiftUI project:

import SwiftUI

struct ContentView: View {
    var body: some View {
        Text("Hello, world!")
            .padding()
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}

A few things to note:

body Property: Every struct that conforms to the View protocol must have a body computed property that describes the view's content and layout. In this example, the body of the ContentView contains a Text view displaying the string "Hello, world!".

Modifiers: SwiftUI views can be customized using modifiers. In the example, the .padding() modifier is added to the Text view, which provides padding around the text.

PreviewProvider: The ContentView_Previews struct is a way to render previews of your SwiftUI views directly within Xcode. By conforming to the PreviewProvider protocol, you can see a live preview of your ContentView (or any other view) in Xcode's canvas without having to run the app on a…