I usually get paths by using NSBundle.
But, NSBundle does not contain Documents folder.
How to get All paths(or names) for files in
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *documentsDirectory = [paths objectAtIndex:0];
To get files from that, you have to give the path structure...
NSString *fileName = @"default.png";
NSString *folderPath = [documentsDirectory stringByAppendingPathComponent:@"%@", fileName];
The folderPath will return you the location of given file name.