I previously wrote a blog post titled Performing any Selector on the Main Thread detailing a convenience category on NSInvoication for easily creating invocation objects that could be invoked on any thread. This category […]
Users and testers will find bugs you are sure you have already fixed. Sometimes they use the wrong version, sometimes your fix is not as good as you thought. Either way a tiny unique […]
There is a vibrant community of open source projects for iOS. You need a calendar UI components or a JSON parser? No problem, the projects are out there. Most code out there is of […]
Apple provides many tools for implementing concurrency in your application. NSOperationQueue, GCD, or simply using performSelectorInBackground:withObject: that is available on each and every object, are just some examples. The tools are there, yet implementing […]
I have my roots in the Atari demo scene, so I know the joys of optimizing the inner-loop of a software texture mapper down to the last assembly instruction. The bragging rights of knowing […]
Cocoa, and by inheritance Cocoa Touch on iOS makes a clear distinction between what is an exception, and what is an error in your application. This should be obvious since NSException and NSError both […]
Cocoa Touch have good support for localizations. Pretty much any file can be localized, including NIB-files with user interface layouts. Unfortunately a NIB-file is an atomic file. So if you later need to do […]
In Java you have for quite some time had the Future interface for encapsulating an asynchronous calculation. Cocoa has had the abstract NSOperation class to encapsulate asynchronous operations. NSOperation do not have any facilities […]
JavaScript Core is unfortunately not a public framework on iOS, leaving us at the mercy of the UIWebView class if we want to execute JavaScript in our applications. I have used JavaScript a lot […]
Cocoa Touch added API for presenting a view controller in a popup bubble in iPhone OS 3.2, the responsible class is named UIPopoverController. One would guess that this new class is a subclass of […]
Many UI frameworks, including AppKit for Mac OS X and UIKit for iPhone OS, require that all methods to UI components are sent on the main UI thread. Cocoa and Cocoa Touch make this […]
A luxury that you seldom have in the world of software development is the luxury of starting over. I am not talking about throwing away everything and start from scratch. But just taking what […]
Enterprise applications and mobile applications have quite different requirements. Starting an enterprise application is just something you do once before it continue running for months or years. On the other side of the spectrum […]
The Cocoa and Cocoa Touch frameworks has a really nice function for acquiring a localized string NSLocalizedString(). Just pass in a key and you are done, for strings that are known at least. Sometimes […]
First impressions last, and the very first impression your users have of your iPhone application is the start up. First step is to have a nice Default.png, but not many words spilled on that […]
The megahertz race is over, and instead we get more execution cores. This means that we as developers must make our applications parallel, in order to take advantage of the new performance. The easiest […]