Difference between revisions of "Swift:Notification Observer Using NSNotificationCenter"
From Hawk Wiki
(→Listen Notification in Swift) |
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| Line 1: | Line 1: | ||
| − | ==Listen Notification in | + | ==Listen Notification in Swift== |
<pre class="brush:swift"> | <pre class="brush:swift"> | ||
func tweetSent(notification: NSNotification) { | func tweetSent(notification: NSNotification) { | ||
let newTweet:Dictionary<String, Tweet> = notification.userInfo as Dictionary<String, Tweet> | let newTweet:Dictionary<String, Tweet> = notification.userInfo as Dictionary<String, Tweet> | ||
} | } | ||
| − | NSNotificationCenter.defaultCenter().addObserver(self, selector: "tweetSent:", name: "newTweetNotification", object: nil) | + | //The colon in "tweetSent:" is not a typo. It indicates the function will take a parameter |
| + | NSNotificationCenter.defaultCenter().addObserver(self, selector: "tweetSent:", name: "newTweetNotification", object: nil) | ||
</pre> | </pre> | ||
| − | ==Send/Post Notification in | + | |
| + | ==Send/Post Notification in Swift== | ||
<pre class="brush:swift"> | <pre class="brush:swift"> | ||
var userInfo: Dictionary<String, Tweet> = ["tweet": newTweet] | var userInfo: Dictionary<String, Tweet> = ["tweet": newTweet] | ||
NSNotificationCenter.defaultCenter().postNotificationName("newTweetNotification", object: nil, userInfo: userInfo) | NSNotificationCenter.defaultCenter().postNotificationName("newTweetNotification", object: nil, userInfo: userInfo) | ||
</pre> | </pre> | ||
| − | ==Remove Notification | + | ==Remove Notification Observer== |
<pre class="brush:swift"> | <pre class="brush:swift"> | ||
deinit { | deinit { | ||
Latest revision as of 06:50, 23 March 2015
Listen Notification in Swift
func tweetSent(notification: NSNotification) {
let newTweet:Dictionary<String, Tweet> = notification.userInfo as Dictionary<String, Tweet>
}
//The colon in "tweetSent:" is not a typo. It indicates the function will take a parameter
NSNotificationCenter.defaultCenter().addObserver(self, selector: "tweetSent:", name: "newTweetNotification", object: nil)
Send/Post Notification in Swift
var userInfo: Dictionary<String, Tweet> = ["tweet": newTweet]
NSNotificationCenter.defaultCenter().postNotificationName("newTweetNotification", object: nil, userInfo: userInfo)
Remove Notification Observer
deinit {
NSNotificationCenter.defaultCenter().removeObserver(self)
}
