ios - Why UIView doesn't need QuartzCore.framework to work? -



ios - Why UIView doesn't need QuartzCore.framework to work? -

i realized every views backed calayer. wondering why when utilize uiview don't need import quartzcore.framework in our project ?

i know need if need set properties shadowoffset illustration i'm sure in own implementation need set these properties.

thanks answers.

because not accessing calayer properties or methods straight unless alter properties of uiview's layer. internally, uiview uses it.

edit reason don't need link utilize uiview because uiview compiled library. of symbols within have been resolved (or flagged weak a.k.a. resolved @ runtime) , compiler , linker utilize them are.

ios uiview uikit core-animation calayer

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