如何实现本地通知badgenumber自动增加－Swift

如何实现本地通知badgenumber自动增加

实现自动增加前提是非重复的本地通知。

几个要点：

1.在你自定义的的注册本地通知方法内，新的通知badgenumber需要通过当前存在的scheduled本地通知数量来确定。(通过后面renumberBadgesOfPendingNotifications方法也能重新分配该badgenumber)

let badgeNbr = UIApplication.sharedApplication().scheduledLocalNotifications?.count ?? 0
let nextBadgeNbr = badgeNbr + 1
yourLocalNotification.applicationBadgeNumber = nextBadgeNbr

2.当本地通知被你点击处理/进入APP的时候，你需要重新分配scheduled的本地通知。

func renumberBadgesOfPendingNotifications() {
        UIApplication.sharedApplication().applicationIconBadgeNumber = 0

        let pendingNotifications = UIApplication.sharedApplication().scheduledLocalNotifications
        
        if (pendingNotifications?.count > 0) {
            
            UIApplication.sharedApplication().cancelAllLocalNotifications()
            
            print(UIApplication.sharedApplication().scheduledLocalNotifications)
            
            let badgeNbr = 0
            
            for noti in pendingNotifications! {
                let temp = badgeNbr + pendingNotifications!.indexOf(noti)! + 1
                noti.applicationIconBadgeNumber = temp
                
                // schedule 'again'
                UIApplication.sharedApplication().scheduleLocalNotification(noti)
            }
        }
    }

3.你可能会想到renumberBadgesOfPendingNotifications()假如程序内新增了本地通知，那么获得的notification并不是按照时间排序的，因而最好再加一个排序。

func renumberBadgesOfPendingNotifications() {

        UIApplication.sharedApplication().applicationIconBadgeNumber = 0
        
        let notifications = UIApplication.sharedApplication().scheduledLocalNotifications
        
        if (notifications?.count > 0) {
            
            let pendingNotifications = notifications?.sort({
                return $0.fireDate!.compare($1.fireDate!) == NSComparisonResult.OrderedDescending ? false : true
            })
            
            UIApplication.sharedApplication().cancelAllLocalNotifications()
         
            let badgeNbr = 0
            
            for noti in pendingNotifications! {
                let temp = badgeNbr + pendingNotifications!.indexOf(noti)! + 1
                noti.applicationIconBadgeNumber = temp
                
                // schedule 'again'
                UIApplication.sharedApplication().scheduleLocalNotification(noti)
            }
        }
    }

然后把上面方法加入
**func applicationDidBecomeActive(application: UIApplication) **

暂时没遇到问题。。

原问题链接