nsnotifications

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Reachability - earlier versions

I would alert the user when the connection with a web server is lost. I t开发者_JAVA百科hink the Apple Reachability class could solve my problem, but I would build for ios < 4.[详细]

2023-02-21 15:28 分类：问答
NSNotification, addObserver and removeObserver - removeObserver both in ViewDidUnload and dealloc?

I want to add a view controller as observer of a notification. When the selector method is called, I\'ll alert the user. I would that this alert ap开发者_JAVA技巧pears only when this view controller[详细]

2023-02-21 14:45 分类：问答
Does the NSNotification retain the object?

My question is in regards the object that gets added to a -postNotificationName:object: userInfo: method.[详细]

2023-02-17 18:20 分类：问答
NSNotification...the right way?

I have an tab bar app and the 2 tabs use the same class (different instances) to show a UITableView. Based on which tab is clicked a few minor changes are made to the appearance, functionality etc. Th[详细]

2023-02-14 02:53 分类：问答
Getting data synchronously from an asynchronous NSURLConnection

I\'m trying to write a method that will operate like this: NSString *responseData = [myAwesomeWrapper getStringfromURL:@\"http://spam.com\"];[详细]

2023-02-12 06:16 分类：问答
Sending data to a method registered for a notification

I need to pass some da开发者_运维技巧ta to a method which I am registering to execute once I receive a notification[详细]

2023-02-11 23:52 分类：问答
QTCaptureDeviceWasConnectedNotification

I am developing a Des开发者_Python百科ktop application that lists the webcams connected to the system. When the user selects the web-cam app streams from the device to the QTCaptureView.[详细]

2023-02-10 04:52 分类：问答
Using NSAlerts and NSNotifications with Reachability 2.2

I have implemented Apple\'s Reachability 2.2 class in a new iOS 4.2 project. I simply want an alert view to appear when the device loses network connectivity. ( And thence comply with the interface us[详细]

2023-02-06 12:56 分类：问答
Where should I remove a notification observer?

I set up a notification observer in my view controller\'s init method like so: [[NSNotificationCenter defaultCenter][详细]

2023-02-04 10:35 分类：问答
NSNotificationCenter: How long does it take to perform an operation

I want to know how long does it take from posting a notification to getting the notification. The reason is that I want to find out if the observer pattern is suitable for me. I don\'t want that anot[详细]

2023-01-22 08:45 分类：问答