[清理角标和通知]

badge.swift

// iOS App如何清除badge并保留通知中心的消息
//https://medium.com/@jasonyuh/ios-app%E5%A6%82%E4%BD%95%E6%B8%85%E9%99%A4badge%E5%B9%B6%E4%BF%9D%E7%95%99%E9%80%9A%E7%9F%A5%E4%B8%AD%E5%BF%83%E7%9A%84%E6%B6%88%E6%81%AF-e4d9f35f9ef5

//https://www.jianshu.com/p/59878fd8053c

func applicationDidBecomeActive(_ application: UIApplication) {
    // MARK: 角标重置
    application.applicationIconBadgeNumber = -1
    // MARK: 移除所有远程通知
    // 即将收到的
    UNUserNotificationCenter.current().removeAllPendingNotificationRequests()
    // 已经收到的
    UNUserNotificationCenter.current().removeAllDeliveredNotifications()
}