FREE TRIAL: Accelerate your app development career with Hacking with Swift+! >>

Showing and hiding form rows

Paul Hudson    @twostraws   

Updated for Xcode 13.0 beta 2

SwiftUI lets us add and remove items from a form as needed, which is particularly helpful when you want to adjust the list of options that are visible based on previous choices.

For example, this shows a single toggle that prompts the user whether they want to show more advanced options. When that toggle is enabled, a second toggle appears allowing them to enable logging:

struct ContentView: View {
    @State private var showingAdvancedOptions = false
    @State private var enableLogging = false

    var body: some View {
        Form {
            Section {
                Toggle("Show advanced options", isOn: $showingAdvancedOptions.animation())

                if showingAdvancedOptions {
                    Toggle("Enable logging", isOn: $enableLogging)
                }
            }
        }
    }
}

Download this as an Xcode project

Notice how I attached animation() to the $showingAdvancedOptions binding, to enable implicit animations for view changes made as a result of any binding change.

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: 4.6/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.