After the WWDC announcements last week, there is a lot to be excited about when it comes to developing for the iPhone. One thing that can potentially help applications run smoother and faster (especially when it comes to networking on the iPhone) is threading. Threading allows developers to run two or more tasks in concurrency. Apple makes this pretty easy in Objective-C and XCode.
If used correctly, threading can be a great way to quicken an application and make it more user friendly. If not used correctly, it is possible to both corrupt data and cause some pretty nasty crashes. Threading is especially useful on multicore processors, as each thread can be run on a separate core. That said, it can still be considered useful on the iPhone and iPod Touch.
For example, think of this scenario. When the user loads an app, it wants to load some photos from the Internet and display some sort of loading page at the same time. If the developer wants this page to remain useful while the images load, he or she can use threading. One thread can go out and fetch the data while the other can load the view as well as any other local files that might be needed. If this was all on one thread, it would have to go in order, so loading the images from the web would take longer than without threading.
You can find more information about threading through Apple’s documentation. Once you get the hang of it, it seems as if it can really help in applications. Either way, Apple makes it very simple for developers to implement, and I’m sure many developers have in their App Store applications.
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This might be an older subject and an old article but I discovered this when I first started looking for a solution to my problem so I thought it would usefull to post some information on a technical solution I found to threading on iPhone.
Anyone having problems or is new to threading in objective-C then check this article out I've written on it; <a href="Programming" rel="nofollow">http://www.eigo.co.uk/Programming-threaded-processes-in-iPhone.aspx">Programming threaded processes in Objective C. Hopefully this will help any of you troubled by the subject from a technical perspective as I know how hard it can be to find an answer.