Category Archives: Asynchronous stuff

Introducing the Default Delegate design pattern

April 4 10

I recently posted an overview of callback mechanisms in Objective-C, including the pros and cons of delegates versus target/action pairs; in this post I’ll introduce a new design pattern that combines many of the benefits of both of these approaches into a single technique. If you’re building a class to be reused many times, it […]

By Tyler Also posted in Class design, General coding, Patterns guides and best practices Tagged , , Comments(0)

The pogo stick of NSRunLoop

March 26 10

Quick intro to NSRunLoop NSRunLoop is the object that manages the big event loop in the sky. Imagine you’re writing your own graphical OS.  A common way to build your control flow is with a loop like this: while(!UserRequestedShutDown(userInput)) { userInput = GetUserInput(); KeyApplicationHandleUserInput(userInput); } The loop continuously gathers and reacts to the user’s actions […]

By Tyler Also posted in learning, UI code tips Tagged , , Comments(1)