I would like to check if a user has iCloud Keychain enabled on an iOS device, in order to prompt them if they haven't so they can switch it on to allow sync of data. Can anyone advise me how to achieve this programmatically?I would like to check if a user has iCloud Keyc
阅读背景：
是否可以检查iOS 7中是否启用了iCloud KeyChain？
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