icloud

Like many of iOS developers I have encountered the issue with application crashing on system before 5.1 when using NSURLIsExcludedFromBackupKey . It was well described how to evaluate existence of this key on this thread: Use NSURLIsExcludedFromBackupKey without crashing on iOS 5.0 One of samvermette's comments says that there is a bug in iOS simulator. Nevertheless I have encountered the same issue with a Release build, even in 2 separate applications. After some investigation I have discovered that application crashed even before main() method beeing called. Which hinted me that this is

I have an iOS app that uses Core Data with iCloud sync. The app is working perfectly and syncing across multiple devices. As part of my implementation my app is registered for the: NSPersistentStoreCoordinatorStoresDidChangeNotification This notification works perfectly with the app in the foreground, but what I would like to do is fire a local notification to let the user know that the iCloud data in the app has changed, whenever the app is in the background and a sync notification comes in. I was under the impression that iCloud Core Data syncing continued in the background, but I am having

最小化写入磁盘数据的数量。文件操作相对比较缓慢，包括写入有限寿命的闪存驱动器。 一些特定的提示帮助你减少与文件相关的操作： 写入文件改变的部分或所有的改变，避免因为几个字节写入整个文件。 当定义文件格式，频繁写入分组块的内容时，减少每次写入磁盘时块的总数。（原文：When defining your file format, group frequently modified content together to minimize the overall number of blocks that need to be written to disk each time.） 如果你的数据是由一组随机访问的结构化内容组成，那么使用Core Date持久化存储或者SQLite数据库，特别是如果你维护的数据可能增长超过几兆字节的情况。 避免写缓存文件到磁盘，唯一的例外是当应用程序退出时，你需要写入一些状态信息，用于app下次启动的时候恢复相同的状态。 App Backup Best Practices 你的应用程序不是必须要以任何方式进行备份恢复的操作。带有激活的iCloud账号的设备会在合适的时间备份他们的app数据到iCloud。对于插入电脑的设备而言，itunes执行增量备份app的数据文件。然而,iCloud和iTunes不备份的内容以下目录: < Application

I'm making a backup managrer for my App (via iCloud). I did some tests and the basics worked. But few days later it stopped. I'm using NSMetadataQuery for searching if backup file exists. My backup files are named e.g. Backup29112011154133.xml where numbers represent date of the backup (formatted as ddMMyyyyHHmmss ). I check for it in -viewDidAppear : - (void)viewDidAppear:(BOOL)animated { [self checkForRemoteFile]; } - (void)checkForRemoteFile { NSURL *ubiq = [[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil]; if (ubiq) { NSMetadataQuery *query = [[NSMetadataQuery alloc]

I'm trying to learn how to use iCloud with coredata. My target is to sync a single database file on mac/ios. Both my mac and iOS apps seem to be updating iCloud as I can see it under System Preferences->iCloud->Manage ... There's an app named Unknown which everytime I change something on the ios/mac app is getting bigger and bigger. So that makes me think The apps are storing changes to the cloud. The problem is, I'm not getting the NSPersistentStoreDidImportUbiquitousContentChangesNotification when i change something on the other platform. There's my code (mac app): - (void

I'm trying to save game's data to iCloud via next code: GKLocalPlayer *localPlayer = [GKLocalPlayer localPlayer]; [localPlayer saveGameData:[NSData dataWithBytes:rawData->data() length:rawData->size()] withName:[NSString stringWithUTF8String:fileName.c_str()] completionHandler:^(GKSavedGame *savedGame, NSError *error) { if (error == nil) { DebugLog(@"Snapshot successfully saved"); } else { DebugLog(@"saveSnapshot error: %@", error.description); } }]; But getting error message: The requested operation could not be completed because you are not signed in to iCloud I've tried to do this in iOS