If you want to have add/remove/resize controls at the bottom of a source list view (like the ones in Mail and so many other nice-looking applications), here’s at least one method of getting them…
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For an application I’m working on, I was adding some core animation effects, and I wanted to make sure only one effect ran at a time. I started to implement my own queuing mechanism when I read about NSOperation. This looks perfect…
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And it comes in different colors…blue is best.