Question

My app was rejected cause it must follow the iOS Data Storage Guidelines. I have already read some answer here on stackoverflow, and i have already read some blogs… I know my problem, at first application launch i copy 1 sqlite db and unzip some images in documents folder. The problem it’s icloud that automaticcaly backup any files in documents directory. I don’t need to use icloud in my app but my files must remain in document folder because they are the base data of my application and must be persit (cache folder or temp folder aren’t correct solutions). So i’ve read about a flag that i can set file by file to forbid the backup :

[URL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:nil];

I have also read that this method works only in ios higher than 5.0.1, in the other it will be simply ignored (i have setted my ios deployment target to 4.3)… If i use this method my app will be rejected again because the older ios devices backup aren’t managed? If yes there is a cross-iosversion method to set the NSURLIsExcludedFromBackupKey?

EDIT
I’m sorry icloud isn’t present in ios earlier 5.0 so i think that the problem regards only differences beetween version 5.0 and 5.0.1, I’m wrong?

Answer 1

I have passed all files that will stored in documents folder through this method.

Try this

-(BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL
{

const char* filePath = [[URL path] fileSystemRepresentation];
const char* attrName = "com.apple.MobileBackup";
if (&NSURLIsExcludedFromBackupKey == nil) {
    // iOS 5.0.1 and lower
    u_int8_t attrValue = 1;
    int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0);
    return result == 0;

}
else {
    // First try and remove the extended attribute if it is present
    int result = getxattr(filePath, attrName, NULL, sizeof(u_int8_t), 0, 0);
    if (result != -1) {
        // The attribute exists, we need to remove it
        int removeResult = removexattr(filePath, attrName, 0);
        if (removeResult == 0) {
            NSLog(@"Removed extended attribute on file %@", URL);
        }
    }

    // Set the new key
    NSError *error = nil;
    [URL setResourceValue:[NSNumber numberWithBool:YES] forKey:NSURLIsExcludedFromBackupKey error:&error];
    return error == nil;
}
}

I’ve found this method here in Stack Overflow:

• Use NSURLIsExcludedFromBackupKey without crashing on iOS 5.0