Xcode compress png files option

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Posted by Vilgan. Posted by antgly. I created the second image by compressing the first image with ImageOptim. After compression the image size was reduced from 1. The result of building the Xcode project and comparing the source and target file sizes was as follows:.

So the first uncompressed image file was reduced by about KB which is pretty poor compared to using ImageOptim. Even worse the second file that I had already compressed actually increased in size though it was still significantly less than the first image size.

Interestingly whilst the first file was not viewable indicating that it was now using the non-standard Apple PNG format the second file could be opened with Preview. In short it seems that you are better off disabling the Xcode PNG compression and compressing the files yourself using a tool like ImageOptim.

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