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development

Core Animation 101: From and To

In development, iOS, Mac on 27 June 2011 tagged Core Animation with no comments

Core Animation is cool, beautiful, and easy to use; but not easy to use correctly. First of all, you should RTFM(Read The Fabulous Manual). Secondly, of course, you should watch the nice Session Video 424 of WWDC 2010 and play with the sample code Animation101. Now, I assume you’ve done all the prerequisite work so [...]

Int Is Difficult

In development on 26 June 2011 with no comments

Int is the simplest data type, isn’t it? Yes, most of the time. No, not really: What’s the value of b? It’s just two lines of code, so don’t resort to your awesome compiler, simply give me the answer. NSUInteger a = 7; NSInteger b = MAX(4 – a, 1); What’s the problem of this [...]

No Highlight, Please

In development, iOS on 10 September 2010 tagged UIButton, UITableViewCell, Voodo with 2 comments

There is a little annoying thing in Voodo‘s Task List view from the very beginning. When you simply select a task to view the Task Info, the check box of that row will turn into being-checked from unchecked (or unchecked from checked, depending on the current state). It may confuse users to think that they [...]