How to get all the names of photos only which are saved in documents folder of iphone application?

NSString *documentsDir = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject; NSArray *dirContents = NSFileManager defaultManager contentsOfDirectoryAtPath:documentsDir error:nil; NSArray *onlyPics = dirContents filteredArrayUsingPredicate:NSPredicate predicateWithFormat:@"self ENDSWITH '. Png'".

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