Find issues in an Xcode iOS project regarding retina/non-retina, unused, and missing images.

When developing for iOS, it's common to have multiple versions of the same image, one each for retina and non-retina devices (icon.png and [email protected], for example).

Within the source code, the images may be referenced by either the 1x or the 2x filenames, which can have some unexpected consequences.

Running this ruby script on your Xcode project will find some of these issues in addition to missing and unused images.

Listed below are the conditions that will be checked:

• Only the 1x image exists
  • Code references 1x image => Warning: Image will be upscaled on retina devices.
  • Code references 2x image => Error: Missing image.
• Only the 2x image exists
  • Code references 1x image => [Need to check]
  • Code references 2x image => [Need to check]
• Both 1x and 2x images exist
  • Code references 1x image => Warning: Image will be downscaled on non-retina devices.

 ./iOSImageReport.rb -d <directory of Xcode project> [-l]

• -d(ir) flag specifies the project directory
• -l(ist) flag will print a list of which images have only 1x versions, only 2x versions, and both 1x and 2x versions
• -a(ll) flag will print a list of all the images in the directory

The current version has a few limitations:

• Only checks .png images
• Only works for a single directory