MobileTuts+

Working with the NSOperationQueue Class

Multi-tasking prevents apps from freezing. In most programming languages, achieving this is a bit tricky, but the NSOperationQueue class in iOS makes it easy! This tutorial will demonstrate how to use the NSOperationQueue class. An NSOperationQueue object is a queue that handles objects of the NSOperation class type. An NSOperation object, simply phrased, represents a […]

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Objective-C Tutorials

How to show and hide (toggle) UITableview sections on the fly

Some time ago I had written a post about how to use UITableView cells and make them work as a drop-down list. Anyone who had read that post might understood that when working with UITableViews you can do things more than the usual and common ones, and you can go as far as your imagination and the technology let you go. Indeed, when knowing how to work with UITableViews in a more advanced level, then you can create more flexible apps that make your users happier.

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Objective-C Tutorials

How to import contacts from the Address Book – Part 2

Welcome to the second part of this tutorial! At the first part we talked about a couple of things on how to import contacts from the device’s Address Book and we developed a demo app to see everything in action. What we really did, was to let us tap on a contact’s name, return back to our app and then select specific pieces of information regarding the selected contact, which we displayed on a table view.

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