UILocalNotification always shows up as soon as I l

问题:

Hello I am new to swift and IOS programming. I have set up 6 notifications that are supposed to alert the user 6 times a day depending on the time of day. The alerts are working but for some reason when the app first launches all 6 alerts show up in the notification center at the same time. Any help will be greatly appreciated.

this is the code in the AppDelegate.swift

func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool {
        // Override point for customization after application launch.



        let notificationTypes : UIUserNotificationType = UIUserNotificationType.Alert | UIUserNotificationType.Badge
        let notificationSetting : UIUserNotificationSettings = UIUserNotificationSettings(forTypes: notificationTypes, categories: nil)
        UIApplication.sharedApplication().registerUserNotificationSettings(notificationSetting)

        return true
    }

this is my function for the six different notifications

func prayerAlert (prayerName : String, prayHour : Int, prayMinute : Int) {


        dateComp.year = Int(currentDate.year)
        dateComp.month = Int(currentDate.month)
        dateComp.day = Int(currentDate.day)
        dateComp.hour = prayHour
        dateComp.minute = prayMinute
        dateComp.timeZone = NSTimeZone.systemTimeZone()

        var calender : NSCalendar = NSCalendar(calendarIdentifier: NSGregorianCalendar)!
        var date : NSDate = calender.dateFromComponents(dateComp)!

        var notification : UILocalNotification = UILocalNotification()
        notification.alertBody = prayerName
        notification.fireDate = date



        UIApplication.sharedApplication().scheduleLocalNotification(notification)
    }

and this is where I'm calling the function in the ViewDidLoad

override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

        pray.setTimeFormat(0)


        self.locationManager.requestAlwaysAuthorization()
        self.locationManager.requestWhenInUseAuthorization()


        if CLLocationManager.locationServicesEnabled() {
            self.locationManager.delegate = self
            self.locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
            self.locationManager.startUpdatingLocation()

        }



        var timesArray = pray.getDatePrayerTimes(currentDate.year, andMonth: currentDate.month, andDay: currentDate.day, andLatitude: locationManager.location.coordinate.latitude, andLongitude: locationManager.location.coordinate.longitude, andtimeZone: pray.timeZone)


            var convertedTime = convertPrayArray(timesArray as NSMutableArray)

            prayerAlert("Time for Fajr", prayHour: convertedTime.hourArray[0], prayMinute: convertedTime.minuteArray[0])
            prayerAlert("Time for SunRise", prayHour: convertedTime.hourArray[1], prayMinute: convertedTime.minuteArray[1])
            prayerAlert("Time for Dhuhr", prayHour: convertedTime.hourArray[2], prayMinute: convertedTime.minuteArray[2])
            prayerAlert("Time for Asr", prayHour: convertedTime.hourArray[3], prayMinute: convertedTime.minuteArray[3])
            prayerAlert("Time for Maghrib", prayHour: convertedTime.hourArray[5], prayMinute: convertedTime.minuteArray[5])
            prayerAlert("Time for Isha", prayHour: convertedTime.hourArray[6], prayMinute: convertedTime.minuteArray[6])


    }

回答1:

Update: Xcode 7.1 • Swift 2.1

The problem is that you are setting the date components to localTime zone instead of the notification.

add this extension NSDate to return the desired components from NSDate()

extension NSDate {
    var minute: Int { return NSCalendar.currentCalendar().component(.Minute, fromDate: self)}
    var hour:   Int { return NSCalendar.currentCalendar().component(.Hour,   fromDate: self)}
    var day:    Int { return NSCalendar.currentCalendar().component(.Day,    fromDate: self)}
    var month:  Int { return NSCalendar.currentCalendar().component(.Month,  fromDate: self)}
    var year:   Int { return NSCalendar.currentCalendar().component(.Year,   fromDate: self)}
    func fireDateAt(hr: Int, min: Int) -> NSDate {
        let date = NSDate()
        return NSCalendar.currentCalendar().dateWithEra(1,
            year: year,
            month: month,
            day: { hr > date.hour || (hr == date.hour && min > date.minute) ? day : day + 1 }(),
            hour: hr,
            minute: min,
            second: 0,
            nanosecond: 0
        )!
    }
}

timeZone Property

The time zone of the notification’s fire date.

The date specified in fireDate is interpreted according to the value of this property. If you specify nil (the default), the fire date is interpreted as an absolute GMT time, which is suitable for cases such as countdown timers. If you assign a valid NSTimeZone object to this property, the fire date is interpreted as a wall-clock time that is automatically adjusted when there are changes in time zones; an example suitable for this case is an an alarm clock.

func prayerAlert (prayerName : String, prayHour : Int, prayMinute : Int) {
    var notification = UILocalNotification()
    notification.timeZone  = NSTimeZone.localTimeZone()
    notification.alertBody = prayerName
    notification.fireDate  = NSDate().fireDateAt(prayHour, min: prayMinute)
    UIApplication.sharedApplication().scheduleLocalNotification(notification)
}