How do I add parallax to my app

To add parallax to your app, you can use the scroll transition modifier in SwiftUI. This modifier allows you to create custom scroll effects, which can include parallax effects. Here's a brief overview of how you can achieve this:

1. Scroll Effects in SwiftUI: The session Create custom visual effects with SwiftUI covers how to create custom scroll effects, including parallax. You can use the scroll transition modifier to change the appearance of items as they scroll in and out of view.

2. Example Implementation: In the session, they demonstrate how to use a horizontal scroll view with a collection of photos. By applying the scroll transition modifier, you can create a unique scrolling experience that includes parallax effects.

Here is a simple example of how you might implement a parallax effect in SwiftUI:

import SwiftUI

struct ParallaxScrollView: View {
    var body: some View {
        ScrollView(.horizontal, showsIndicators: false) {
            HStack {
                ForEach(0..<10) { index in
                    GeometryReader { geometry in
                        Image("photo\(index)")
                            .resizable()
                            .scaledToFill()
                            .frame(width: 300, height: 200)
                            .clipped()
                            .rotation3DEffect(
                                Angle(degrees: Double(geometry.frame(in: .global).minX - 30) / -20),
                                axis: (x: 0, y: 10.0, z: 0)
                            )
                    }
                    .frame(width: 300, height: 200)
                }
            }
        }
    }
}

In this example, the rotation3DEffect is used to create a parallax effect by rotating the images based on their position in the scroll view.

For more detailed information and examples, you can refer to the session Create custom visual effects with SwiftUI.