app由于未按照iCoud数据储存的准则被拒。
因为项目中需要下载许多数据，会将其储存在Doucments目录下。上线时被拒，apple给的邮件说明是这样的：
Please verify that only the content that the user creates using your app, e.g., documents, new files, edits, etc. is backed up by iCloud as required by the iOS Data Storage Guidelines. Also, check that any temporary files used by your app are only stored in the /tmp directory; please remember to remove or delete the files stored in this location when it is determined they are no longer needed.
Data that can be recreated but must persist for proper functioning of your app - or because users expect it to be available for offline use - should be marked with the "do not back up" attribute. For NSURL objects, add the NSURLIsExcludedFromBackupKey attribute to prevent the corresponding file from being backed up. For CFURLRef objects, use the corresponding kCRUFLIsExcludedFromBackupKey attribute.
大概意思就是说数据需要添加NSURLIsExcludedFromBackupKey，标明防止数据备份。
如何标明
这是一段标明文件不需要备份的代码
-(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){
//未成功标记
}
return success;
}
