[[UNUserNotificationCenter currentNotificationCenter] getNotificationSettingsWithCompletionHandler:^(UNNotificationSettings * _Nonnull settings) {
if (settings.authorizationStatus == UNAuthorizationStatusNotDetermined)
{
NSLog(@"未选择");
}else if (settings.authorizationStatus == UNAuthorizationStatusDenied){
NSLog(@"未授权");
[self showAlertOfNotification];
}else if (settings.authorizationStatus == UNAuthorizationStatusAuthorized){
NSLog(@"已授权");
}
}];
