如何检查iCloud是否以编程方式配置 [英] How to check if iCloud is configured programmatically

问题描述

以下是来自Apple Docs的句子：
如果未配置iCloud，请询问用户是否要配置它（如果他们想要配置iCloud，最好将它们转移到启动设置）。

Here is the sentence from Apple Docs: "If iCloud is not configured, ask users if they want to configure it (and, preferably, transfer them to Launch Settings if they want to configure iCloud)."

如何检查是否配置了iCloud以及如何启动iCloud的设置？

How can I check if iCloud is configured or not and how to launch settings for iCloud?

推荐答案

编辑


如果您的目标是iOS6或更高版本，您可以使用 [[NSFileManager defaultManager] ubiquityIdentityToken]; 。有关使用示例，请参阅 @Dj S'回答 :)。

它比它更快更容易适用于iOS5及以上人群的原始解决方案

If you are targeting iOS6 or above you can use [[NSFileManager defaultManager] ubiquityIdentityToken];. For usage example please refer @Dj S' answer :).
It is faster and easier than the original solution which was meant for people targeting iOS5 and above

原始答案

如 iOS应用程序编程指南 - iCloud存储。可以通过向文件管理器询问ubiquity容器URL来检查：）

Original Answer
As documented in iOS App programming guide - iCloud Storage. That can be checked by asking the ubiquity container URL to the file manager :)

只要你提供一个有效的普遍容器标识符，方法就应该返回YES

As long as you supply a valid ubiquity container identifier below method should return YES

- (BOOL) isICloudAvailable
{
    // Make sure a correct Ubiquity Container Identifier is passed
    NSURL *ubiquityURL = [[NSFileManager defaultManager] 
        URLForUbiquityContainerIdentifier:@"ABCDEFGHI0.com.acme.MyApp"];
    return ubiquityURL ? YES : NO;
}

但是，我发现 URLForUbiquityContainerIdentifier：在会话中第一次可能需要几秒钟（我在iOS5中使用它，所以现在可能会有所不同）。我记得使用过这样的东西：

However, I've found that URLForUbiquityContainerIdentifier: might take several seconds the very first time within a session (I used it in iOS5 so things might be different now). I remember using something like this:

dispatch_queue_t backgroundQueue = 
   dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0);
dispatch_async(backgroundQueue,^{
   BOOL isAvailable = [self isICloudAvailable]
  /* change to the main queue if you want to do something with the UI. For example: */
   dispatch_async(dispatch_get_main_queue(),^{
       if (!isAvailable){
         /* inform the user */
         UIAlertView *alert = [[UIAlertView alloc] init...]
         [alert show];
         [alert release];
       }
   });
});

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