Hello World!
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Updating storyboard strings
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How to use Blocks with GCD correctly to avoid retain cycle
This is an article about Block, GCD and retain cycle.
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Objective C ivars' definition
When I first learned obj-c, I confused on how to declare an instance variable properly, because there are so many ways to do it. This article is trying to figure out the differences of defining an instance variable and find the right way to create an instance variable in the right place.