极光推送集成在iOS10以下系统中崩溃

极光推送集成在iOS10以下系统中崩溃
报错信息：

dyld: Library not loaded: /System/Library/Frameworks/UserNotifications.framework/UserNotifications
  Referenced from: /var/containers/Bundle/Application/146F1FA4-D52B-4FBF-B735-126AF89AB92D/Taoke001.app/Taoke001
  Reason: image not found

把UserNotifications.framework的Status改成Optional