[CMake] Icon and Launch image support for iOS apps

[Daniel Dewald]

Howdy folks,

I'm currently in the process of converting our internal projects from premake to cmake. The process is almost complete. However I've been stuck on a seemingly simple problem the last few days that I could need some help /advise on. Since premake as well as CMake don't have an option to integrate Icon and LaunchImage support for iOS builds in XCode, we have a bash script, that patches the generated project files, to insert the appropriate lines to enable the icon support (this basically is 1.) copying the images into the app folder 2.) including the prepared xcasset file into the resource "folder" of the project (not the target) and 3.) creating a "Copy Bundle Resources" build phase step with the .xcassets file in the target's build phases tab). The script is currently run after cmake is done (in our projects batch file) and this works fine so far for premake as well as cmake. The problem now is that if something is changed, cmake will regenerate the project files and erase those changes. The logical idea would be to execute the script whenever cmake is run. However there is no such functionality in cmake as far as anyone could tell me. Anybody has any clue as to whether cmake supports anything in that area. All ow this has to be done BEFORE the build process is started and AFTER the project files have been created. Otherwise it won't work. We really need this because some genius from Apple decided it would be a good idea for the apps to decide what resolution an app should use on whatever lauch image resolution was choosen O_o.

Greetz

Daniel

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Daniel Dewald
Build Engineer
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