ALAssetsLibrary doesn't send ALAssetsLibraryChangedNotification

Number:rdar://10484334 Date Originated:24-Nov-2011 01:52 AM
Status:Open Resolved:
Product:iPhone SDK Product Version:5.0/9a405
Classification:Other Bug Reproducible:Always
It's impossible to detect changes in ALAssetsLibrary while running on iOS 5.0-5.0.1 because no one sends ALAssetsLibraryChangedNotification

Steps to Reproduce:
1. Run the attached sample on device with iOS 5.0.1
2. Open Xcode debug console
3. Hit power + home buttons to capture screenshot

Expected Results:
Debug output indicating printing description of ALAssetsLibraryChangedNotification

Actual Results:
No debug output

According to this bug appeared in iOS 5 beta 6

There are two workarounds for this issue:
1. Call [self.assetsLibrary writeImageToSavedPhotosAlbum:nil metadata:nil completionBlock:^(NSURL *assetURL, NSError *error) { }]; immediately after creating instance of ALAssetsLibrary
2. Observe NSManagedObjectContextObjectsDidChangeNotification


This workaround has a side effect that it requests permission to access Photos on iOS 6 (maybe popping up a dialog asking the user), which you may not want to do at this point.

By spoon.reloaded at Oct. 9, 2012, 12:03 a.m. (reply...)

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