This project is for demo purposes only.
Go to Apple's ml-stable-diffusion repo and Follow the instructions of the "Converting Models to Core ML" section. When in step 4, you will need to add the --bundle-resources-for-swift-cli to the python command in order to generate the necessary resources for using the StableDiffusion swift package.
After converting the model to Core ML model, you will find a Resources folder in the output directory. Copy it to this project's root directory and rename it to StableDiffusionResources and create a reference for the folder in the Xcode navigator and make sure this folder is appearing in the Copy Bundle Resources in the build phase of the build target configuration.
Since the Xcode 14.2 RC is released, I can build and deploy the project on a iPad Pro (M2) and a iPhone 12 Pro Max and the M2 iPad runs very well but the iPhone 12 Pro Max crashed every time, which may caused by lack of memory. (13th Dec, 2022)