How to detect when the Back button is tapped
Swift version: 5.1
You probably already know that viewWillDisappear() is called when a view controller is about to go away, and that's also called when the user taps the Back button in a navigation controller. Problem is, the same method is called when the user moves forward, i.e. when you push another view controller onto the stack.
The solution is simple: create a Boolean property called goingForwards in your view controller, and set it to true before pushing any view controller onto the navigation stack, then set it back to false when the view controller is shown again. This way, when viewWillDisappear() is called you can check goingForwards: if it's false, the user tapped Back.
SPONSORED Building in-app subscriptions are hard. RevenueCat makes it simple. With their open source SDKs, you can painlessly implement subscriptions for your app in hours, not months.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 2.0
Similar solutions…
- How to customize a view controller’s back button on a navigation bar: backBarButtonItem
- How to create a tappable button
- How to make a button glow when tapped with showsTouchWhenHighlighted
- How to use Instruments to profile your SwiftUI code and identify slow layouts
- How to make empty UITableViews look more attractive using DZNEmptyDataSet
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
