Question

我试图在我的应用程序中发送通知，它应该每隔一小时重复一次，但它重复不受管制，要清楚，它有时会重复30分钟，有时需要一小时，有时长时间等等。我在“AppDelegate.swift”中使用的代码：

class AppDelegate: UIResponder, UIApplicationDelegate {

var window: UIWindow?

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

    //Notification Repeat
application.registerUserNotificationSettings(UIUserNotificationSettings(forTypes: UIUserNotificationType.Alert | UIUserNotificationType.Badge | UIUserNotificationType.Sound, categories: nil))


    return true  
}

和我在“ViewController.swift”中使用的代码：

//Notification Repeat
var Time = 1



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


    //Notification Repeat
    var Timer = NSTimer.scheduledTimerWithTimeInterval(3600.0, target: self, selector: Selector("activateNotifications"), userInfo: nil, repeats: true)
}



//Notification Repeat
func activateNotifications() {

    Time -= 1

    if (Time <= 0){



        var activateNotifications = UILocalNotification()

        activateNotifications.alertAction = “Hey"
        activateNotifications.alertBody = “Hello World!"


        activateNotifications.fireDate = NSDate(timeIntervalSinceNow: 0)


        UIApplication.sharedApplication().scheduleLocalNotification(activateNotifications)
    }
}

有人帮助我，我犯了错误吗？

Answer 1

你根本不需要计时器。 UILocalNotification类有一个名为repeatInterval的属性，正如您所料，可以设置重复通知的时间间隔。

根据这一点，您可以按以下方式安排每小时重复的本地通知：

func viewDidLoad() {
    super.viewDidLoad()

    var notification = UILocalNotification()
    notification.alertBody = "..." // text that will be displayed in the notification        
    notification.fireDate = NSDate()  // right now (when notification will be fired)
    notification.soundName = UILocalNotificationDefaultSoundName // play default sound
    notification.repeatInterval = NSCalendarUnit.CalendarUnitHour // this line defines the interval at which the notification will be repeated
    UIApplication.sharedApplication().scheduleLocalNotification(notification)
}

注意：确保仅在启动通知一次时执行代码，因为它每次执行时都会安排不同的通知。为了更好地了解本地通知，您可以阅读Local Notifications in iOS 8 with Swift (Part 1)和Local Notifications in iOS 8 with Swift (Part 2)。

如何在iOS应用程序上发送通知，每隔一（1）小时重复一次？

1 个答案: