swift 请求通知权限

一 首先 import UserNotifications

二 请求权限

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey: Any]?) -> Bool {
        
        /// 取得用户授权 显示通知（上方提示条/声音/badgeNumber）
        if #available(iOS 10.0, *) {
            UNUserNotificationCenter.current().requestAuthorization(options: [.badge, .sound, .alert, .carPlay]) { (success, error) in
                print("授权" + (success ? "成功" : "失败"))
            }
        } else {
            // Fallback on earlier versions
            let settings = UIUserNotificationSettings(types: [.alert, .badge, .sound], categories: nil)
            application.registerUserNotificationSettings(settings)
        }
        
        return true
    }