Swift-basic use of notifications, swift-Use of notifications

Source: Internet
Author: User

Swift-basic use of notifications, swift-Use of notifications

// Use of notifications

1. Send a notification. (Take this notification as an example. The notification name is nickNameNotification. The notification parameter is title)

Nsicationicationcenter. defacenter Center (). postNotificationName ("nickNameNotification", object: title );
The title here is the parameter to be uploaded.

2. Add an observer to the viewDidload method to listen to the notification.

NSNotificationCenter. defacenter Center (). addObserver (self, selector: "updateNickName:", name: "nickNameNotification", object: nil );

3. Implement selector in step 2 and listen to the method of notification call

Func updateNickName (title: NSNotification) {var str = title. object as String; self. titleLable. text = str ;}

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