cocoa – 在一定时间后隐藏NSUserNotification

目前,当我使用警报样式创建NSUserNotification时,除非我手动关闭它,否则它将不会隐藏.

有没有办法可以在2秒后自动关闭/隐藏它？

NSUserNotification代码仅供参考：

let notification:NSUserNotification = NSUserNotification()
notification.title = "Title"
notification.subtitle = "Subtitle"
notification.informativeText = "Informative text"

notification.soundName = NSUserNotificationDefaultSoundName

notification.deliveryDate = NSDate(timeIntervalSinceNow: 10)
notification.hasActionButton = false
let notificationcenter:NSUserNotificationCenter = NSUserNotificationCenter.defaultUserNotificationCenter()
notificationcenter.scheduleNotification(notification)

使用NSObject来实现这一点非常简单
performSelector：withObject：afterDelay：方法.

由于您在一定时间间隔后安排通知传递,因此您需要在解除之前将额外延迟添加到传递之前的初始延迟.在这里,我把它们写成交货前10秒的常数,以及解雇前2秒：

let delayBeforeDelivering: NSTimeInterval = 10
let delayBeforeDismissing: NSTimeInterval = 2

let notification = NSUserNotification()
notification.title = "Title"
notification.deliveryDate = NSDate(timeIntervalSinceNow: delayBeforeDelivering)

let notificationcenter = NSUserNotificationCenter.defaultUserNotificationCenter()

notificationcenter.scheduleNotification(notification)

notificationcenter.performSelector("removeDeliveredNotification:",
    withObject: notification,
    afterDelay: (delayBeforeDelivering + delayBeforeDismissing))