ios - 快速多重通知

Question

    let dateComponents1 = calendar!.components([NSCalendarUnit.Day, NSCalendarUnit.WeekOfMonth, NSCalendarUnit.Month,NSCalendarUnit.Year,NSCalendarUnit.Hour,NSCalendarUnit.Minute], fromDate:date)
    dateComponents1.month = 5
    dateComponents1.day = 12
    dateComponents1.hour = 20
    dateComponents1.minute = 00
    let notification1 = UILocalNotification()
    notification1.alertAction = "notification1"
    notification1.alertBody = "notification1"
    notification1.repeatInterval = NSCalendarUnit.WeekOfYear
    notification1.fireDate = calendar!.dateFromComponents(dateComponents1)
    UIApplication.sharedApplication().scheduleLocalNotification(notification1)




    let dateComponents2 = calendar!.components([NSCalendarUnit.Day, NSCalendarUnit.WeekOfMonth, NSCalendarUnit.Month,NSCalendarUnit.Year,NSCalendarUnit.Hour,NSCalendarUnit.Minute], fromDate:date)
    dateComponents2.month = 5
    dateComponents2.day = 13
    dateComponents2.hour = 14
    dateComponents2.minute = 00
    let notification2 = UILocalNotification()
    notification2.alertAction = "notification2"
    notification2.alertBody = "notification2"
    notification2.repeatInterval = NSCalendarUnit.WeekOfYear
    notification2.fireDate = calendar!.dateFromComponents(dateComponents2)
    UIApplication.sharedApplication().scheduleLocalNotification(notification2)

我尝试每周在特定时间触发 2 个通知。这就是我实现通知的方式。每周周四下午 8 点和周五下午 2 点触发 2 个通知。我做对了吗？有时我会在火灾发生时收到重复的通知。

Answer 1

好的，所以在评论中您提到您在 didBecomeActive 中调用了这段代码。问题是每次您的应用程序变得活跃时，您都会安排一个您不想要的重复通知。因此，您应该使用以下代码:

let dateComponents1 = calendar!.components([NSCalendarUnit.Day, NSCalendarUnit.WeekOfMonth, NSCalendarUnit.Month,NSCalendarUnit.Year,NSCalendarUnit.Hour,NSCalendarUnit.Minute], fromDate:date)
dateComponents1.month = 5
dateComponents1.day = 12
dateComponents1.hour = 20
dateComponents1.minute = 00
let notification1 = UILocalNotification()
notification1.alertAction = "notification1"
notification1.alertBody = "notification1"
notification1.repeatInterval = NSCalendarUnit.WeekOfYear
notification1.fireDate = calendar!.dateFromComponents(dateComponents1)
UIApplication.sharedApplication().cancelLocalNotification(notification1)
UIApplication.sharedApplication().scheduleLocalNotification(notification1)




let dateComponents2 = calendar!.components([NSCalendarUnit.Day, NSCalendarUnit.WeekOfMonth, NSCalendarUnit.Month,NSCalendarUnit.Year,NSCalendarUnit.Hour,NSCalendarUnit.Minute], fromDate:date)
dateComponents2.month = 5
dateComponents2.day = 13
dateComponents2.hour = 14
dateComponents2.minute = 00
let notification2 = UILocalNotification()
notification2.alertAction = "notification2"
notification2.alertBody = "notification2"
notification2.repeatInterval = NSCalendarUnit.WeekOfYear
notification2.fireDate = calendar!.dateFromComponents(dateComponents2)
UIApplication.sharedApplication().cancelLocalNotification(notification2)
UIApplication.sharedApplication().scheduleLocalNotification(notification2)

我在这里所做的是取消先前的通知(上次应用程序激活时安排的通知)，然后再次安排它，这样您就不会收到太多重复的通知。此方法的替代方法是将代码放置在仅被调用一次的位置，这样您就不会收到重复的通知。