Detecting iOS screenshots ala Snapchat and Facebook Poke
Objective-C Ruby
Latest commit f8852c9 Mar 11, 2013 @clayallsopp Merge pull request #3 from neilparikh/patch-1
Fix installation instructions for xcode in readme


Detecting iOS screenshots ala Snapchat and Facebook Poke.

Current technique is to poll the user's camera roll and check for new screenshot-esque images; if you would like to add another technique, definitely submit a pull-request!


[[ShotBlocker sharedManager] detectScreenshotWithImageBlock:^(UIImage *screenshot) {
    NSLog(@"Screenshot: %@", screenshot);

// Later on...

[[ShotBlocker sharedManager] stopDetectingScreenshots];

Also available are:

  • detectScreenshotWithBlock:^()
  • detectScreenshotWithBlock:^() andErrorBlock:^(NSError * error){}
  • detectScreenshotWithImageBlock:^(UIImage *screenshot) andErrorBlock:^(NSError * error){}

The NSError will occur if the user denies your app access to their photos.



pod 'ShotBlocker'
#import <ShotBlocker/ShotBlocker.h>


  1. Add ShotBlocker as a git submodule. Here's how to add it as a submodule:
$ cd rootOfYourGitRepo
$ git submodule add Vendor/ShotBlocker
$ git submodule update --init --recursive
  1. Add ShotBlocker/ShotBlocker.h and ShotBlocker/ShotBlocker.m to your project, but don't copy the files (so the location is relative).

  2. Add AssetsLibrary.framework to your project

#import "ShotBlocker.h"


Clay Allsopp @clayallsopp