我目前正在使用 HealthKit，我想知道：是否有可能知道 requestAuthorization 之前是否被问过？
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Based on the documentation, it appears not. You can ask for authorization status for a particular HKObjectType, but this will only tell you if can save data of that type. You can't tell whether read access has been granted. According to the docs:
To help prevent possible leaks of sensitive health information, your app cannot determine whether or not a user has granted permission to read data.
You can call requestAuthorization repeatedly, and the user will only be prompted if they have not previously granted access to the HKObjectType's requested:
If the user has already chosen to grant or prohibit access to all of the types specified, the completion is called without prompting the user.
于 2018-04-17T14:34:03.597 回答