This shell script is to generate all the necessary app icons for iMessageSticker of different sizes and ratios with a single command. It also includes Contents.json file so that you don't have to drag each of the image files to the project.
This script uses ImageMagick. So you must install ImageMagick before using this script. You can install ImageMagick with following command.
$ sudo brew install ImageMagick
If you don't have brew installed yet, install brew first.
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
Run the script with two source image paths in terminal. You can easily get the path of the image by dragging the image into the terminal window.
$ sh iMessageSticker-icon-generator.sh [SRC_FILE_SQUARE] [SRC_FILE_RECTANGLE]
// EXAMPLE
$ sh iMessageSticker-icon-generator.sh ~/project/square.png ~/projet/rectangle.png
The preferable size of the input source images is as follows.
- Square Image : 1024x1024 pixel
- Rectangle Image : 1200x768 pixel
After running the script, there will be 11 resulting image files and a Content.json file in the resource folder. By simply dragging all the images and json file to [YOUR XCODE PROJECT PATH]/StickerPackExtension/Stickers.xcstickers/iMessage App Icon.stickersiconset.
Then the images are filled automatically in Xcode project like the following screenshot.
Don't get mad with photoshop resizing any more!