About UIKIT_EXTERN in FBShimmeringLayer.m about shimmer HOT 5 CLOSED

#ifdef __cplusplus
#define UIKIT_EXTERN        extern "C" __attribute__((visibility ("default")))
#else
#define UIKIT_EXTERN            extern __attribute__((visibility ("default")))
#endif

Here's how it's defined. If you don't know what extern does, then start here: http://www.geeksforgeeks.org/understanding-extern-keyword-in-c/

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UIAnimationDragCoefficient is a private function defined in UIKit. It's used in Shimmer to add support for the slow animations feature when debugging in the simulator. By using UIKIT_EXTERN, it tells the compiler that the function is implemented in UIKit rather than in Shimmer itself.

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private function? wow so many hacks there!

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It's only used to help debugging in the simulator. It's not required to use Shimmer and won't affect your apps on the App Store.

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🆒

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