NEW: Get your ticket to Hacking with Swift Live! >>

How to add and remove views with a transition

Paul Hudson    @twostraws   

Updated for Xcode 13.0 beta 2

You can include or exclude a view in your design just by using a regular Swift condition. For example, this adds or removes some details text when a button is tapped:

struct ContentView: View {
    @State private var showDetails = false

    var body: some View {
        VStack {
            Button("Press to show details") {
                withAnimation {
                    showDetails.toggle()
                }
            }

            if showDetails {
                Text("Details go here.")
            }
        }
    }
}

Download this as an Xcode project

By default, SwiftUI uses a fade animation to insert or remove views, but you can change that if you want by attaching a transition() modifier to a view.

For example, we could make several text views transition in different ways, like this:

struct ContentView: View {
    @State private var showDetails = false

    var body: some View {
        VStack {
            Button("Press to show details") {
                withAnimation {
                    showDetails.toggle()
                }
            }

            if showDetails {
                // Moves in from the bottom
                Text("Details go here.")
                    .transition(.move(edge: .bottom))

                // Moves in from leading out, out to trailing edge.
                Text("Details go here.")
                    .transition(.slide)

                // Starts small and grows to full size.
                Text("Details go here.")
                    .transition(.scale)
            }
        }
    }
}

Download this as an Xcode project

Hacking with Swift is sponsored by Essential Developer

SPONSORED From August 2nd to 8th you can join a FREE crash course for mid/senior iOS devs who want to achieve an expert level of technical and practical skills – it’s the fast track to being a complete senior developer!

Save your spot now

Sponsor Hacking with Swift and reach the world's largest Swift community!

Similar solutions…

BUY OUR BOOKS
Buy Pro Swift Buy Swift Design Patterns Buy Testing Swift Buy Hacking with iOS Buy Swift Coding Challenges Buy Swift on Sundays Volume One Buy Server-Side Swift (Vapor Edition) Buy Advanced iOS Volume One Buy Advanced iOS Volume Two Buy Advanced iOS Volume Three Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with macOS Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Server-Side Swift (Kitura Edition) Buy Beyond Code

Was this page useful? Let us know!

Average rating: 4.5/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.