App被拒原因2.23 - Apps must follow the iOS Data Storage Guidelines

按照网上教程添加如下方法
还是被拒，求大神帮忙啊，一个人开发不容易，求助啊
- (BOOL)addSkipBackupAttributeToItemAtPath:(NSString *) filePathString
{
    NSURL* URL= [NSURL fileURLWithPath: filePathString];
    
    assert([[NSFileManager defaultManager] fileExistsAtPath: [URL path]]);
    NSError *error = nil;
    BOOL success = [URL setResourceValue: [NSNumber numberWithBool: YES]
                    
                                  forKey: NSURLIsExcludedFromBackupKey error: &error];
    
    if(!success){
        
        NSLog(@"Error excluding %@ from backup %@", [URL lastPathComponent], error);
        
    }
    
    return success;
}