What is PngCrush in iOS?

Question

i know that Pngcrush is an image optimisation technique in iOS , but my doubt is does X-code will perform this internally during each build or before deploying our app to iT

Answer 1

By default, XCode performs automatically the crunching.

You can control this behavior from your project's build settings:

Search for the setting "Compress PNG Files" and set the value you want.