NEW: Start my new Ultimate Portfolio App course with a free Hacking with Swift+ trial! >>

How to detect when the user takes a screenshot

Swift version: 5.2

Paul Hudson    @twostraws   

If you’re showing sensitive data it can be important to know when you’re user takes a screenshot. Snapchat, for example, automatically notifies participants in a conversation if someone takes a screenshot, effectively letting them know their privacy might have been breached.

The key is to watch for the .UIApplicationUserDidTakeScreenshot message to be posted, which will happen whenever a screenshot happens. For example, this runs a screenshotTaken() method:

NotificationCenter.default.addObserver(self, selector: #selector(screenshotTaken), name: UIApplication.userDidTakeScreenshotNotification, object: nil)

And this just prints a log message instead:

NotificationCenter.default.addObserver(forName: UIApplication.userDidTakeScreenshotNotification, object: nil, queue: OperationQueue.main) { notification in
    print("Screenshot taken!")
}

Use whichever of those two fits your needs best.

Hacking with Swift is sponsored by RevenueCat

SPONSORED Building and maintaining in-app subscription infrastructure is hard. Luckily there's a better way. With RevenueCat, you can implement subscriptions for your app in hours, not months, so you can get back to building your app.

Try it for free

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

Available from iOS 7.0

Similar solutions…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

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: 3.4/5

 
Unknown user

You are not logged in

Log in or create account
 

Link copied to your pasteboard.