How to detect screenshots on iOS (like SnapChat)

A number of Stack Overflow questions were having issues with this, so I figured I’d explain. From reverse engineering, this is the exact method used by SnapChat, but it’s also pretty much what I’d have done myself. The process is pretty simple, and relies on a quirk of iOS: taking a screenshot cancels all touches on the screen. Because of that, anything that you want to protect will require you to

[gologo13]

iOS6 までのスクリーンショット対応

[leechael]

Interesting approach to prevent user do screenshot to your app.