即使配置正确，URLForUbiquityContainerIdentifier也会返回nil [英] URLForUbiquityContainerIdentifier returns nil even if configured correctly

问题描述

我遇到了问题，即使用户在设置中正确设置了所有内容，URLForUbiquityContainerIdentifier在某些情况下也会返回nil。我的代码：

I am having the problem, that URLForUbiquityContainerIdentifier is returning nil in some cases even if the user has set up everything correctly in the settings. My code:

dispatch_async(someQueue, ^{

    if (![[NSFileManager defaultManager] URLForUbiquityContainerIdentifier:nil]) {
        ErrLog(@"iCloud container not available.");
        return;
    }

    dispatch_async(dispatch_get_main_queue(), ^{
       [...]
    });

});

有人遇到同样的问题吗？我将nil设置为容器标识符，该标识符应该根据Apple文档工作，但我对此不再那么信服。此代码也适用于大多数用户，但不是每个人都适用。

Does anybody came across the same problem? I am setting nil as the container identifier which should work according to the Apple docs, but I am not so convinced anymore about that. Also this code works fine for the majority of users, but somehow not for everybody.

推荐答案

iPad mini与iOS7。我刚刚经历过URLForUbiquityContainerIdentifier突然开始返回nil。我尝试重新启动设备，但没有帮助。

iPad mini with iOS7. I just have experienced that URLForUbiquityContainerIdentifier suddenly started to return nil. I tried restarting the device, but it didn't help.

在设置应用内，在iCloud菜单下。我注意到'文件&数据'设置为关闭。

Inside the Settings app, under the 'iCloud' menu. I noticed that 'Documents & Data' was set to Off.

解决方案是改变'文件&数据'到'开'。

Solution was to change 'Documents & Data' to 'On'.

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