iOS 重设App图标未读数

    /// 重设App图标未读数
    ///
    /// - Returns: 当前未读数
    class func resetAppIconBageNumber() -> Int {
        let sysNum = UserDefaults.standard.integer(forKey: SystemUnNotice)
        let orderNum = UserDefaults.standard.integer(forKey: OrderUnNotice)
        let assignOrderNum = UserDefaults.standard.integer(forKey: AssignOrderNotice)
        let privateNum = SNIMManager.getAllSessionAllUnReadNumber()
        let num:Int = sysNum + orderNum + assignOrderNum + privateNum
        if num == 0 {
            if #available(iOS 11.0, *){//-1 仅让appIcon消失 不让push消失 仅11有用 10以下用下种方法
                UIApplication.shared.applicationIconBadgeNumber = -1
            }else{  //会触发"didReceive notification: UILocalNotification"方法
                let clearEpisodeNotification:UILocalNotification = UILocalNotification.init()
                clearEpisodeNotification.applicationIconBadgeNumber = UIApplication.shared.applicationIconBadgeNumber
                UIApplication.shared.scheduleLocalNotification(clearEpisodeNotification)
                clearEpisodeNotification.applicationIconBadgeNumber = -1
                UIApplication.shared.scheduleLocalNotification(clearEpisodeNotification)
            }
        }else{
            UIApplication.shared.applicationIconBadgeNumber = num
        }
        return num
    }

注意：这个方法不能在 application(_ application: UIApplication, didReceive notification: UILocalNotification) 方法中调用哦！！！