要求隨時取得使用者位置的權限
Published in
Sep 23, 2017
iOS 11:
要同時設定
Privacy — Location When In Use Usage Description
Privacy — Location Always and When In Use Usage Description。
建議先呼叫 requestWhenInUseAuthorization()，之後需要時再呼叫 requestAlwaysAuthorization()
iOS 11 之前:
設定 Privacy — Location Always Usage Description。
