Get strong typed, autocompleted resources like images, fonts and segues in Swift projects
It makes your code that uses resources:
- Fully typed, less casting and guessing what a method will return
- Compile time checked, no more incorrect strings that make your app crash at runtime
- Autocompleted, never have to guess that image name again
Currently you type:
let icon = UIImage(named: "settings-icon")
let font = UIFont(name: "San Francisco", size: 42)
let viewController = CustomViewController(nibName: "CustomView", bundle: nil)
let string = String(format: NSLocalizedString("welcome.withName", comment: ""), locale: NSLocale.currentLocale(), "Arthur Dent")With R.swift it becomes:
let icon = R.image.settingsIcon()
let font = R.font.sanFrancisco(size: 42)
let viewController = CustomViewController(nib: R.nib.customView)
let string = R.string.localizable.welcomeWithName("Arthur Dent")Check out more examples or hear about how Fabric.app uses R.swift!
Autocompleted images:
Compiletime checked images:
This is only the beginning, check out more examples!
After installing R.swift into your project you can use the R-struct to access resources. If the struct is outdated just build and R.swift will correct any missing/changed/added resources.
R.swift currently supports these types of resources:
Runtime validation with R.assertValid():
- If all images used in storyboards are available
- If all view controllers with storyboard identifiers can be loaded
- Why was R.swift created?
- Why should I choose R.swift over alternative X or Y?
- What are the requirements to run R.swift?
- How to use methods with a
Voidargument? - How to fix missing imports in the generated file?
- How does R.swift work?
- How to upgrade to a new major version?
CocoaPods is the recommended way of installation, as this avoids including any binary files into your project.
Note on Carthage: R.swift is a tool that used in a build step, it is not a dynamic library. Therefore it is not possible to install it with Carthage.
There is also a short video of this instruction.
- Add
pod 'R.swift'to your Podfile and runpod install - In Xcode: Click on your project in the file list, choose your target under
TARGETS, click theBuild Phasestab and add aNew Run Script Phaseby clicking the little plus icon in the top left - Drag the new
Run Scriptphase above theCompile Sourcesphase and belowCheck Pods Manifest.lock, expand it and paste the following script:"$PODS_ROOT/R.swift/rswift" "$SRCROOT" - Build your project, in Finder you will now see a
R.generated.swiftin the$SRCROOT-folder, drag theR.generated.swiftfiles into your project and uncheckCopy items if needed
Tip: Add the *.generated.swift pattern to your .gitignore file to prevent unnecessary conflicts.
- Add the R.swift.Library to your project
- Download a R.swift release, unzip it and put it into your source root directory
- In Xcode: Click on your project in the file list, choose your target under
TARGETS, click theBuild Phasestab and add aNew Run Script Phaseby clicking the little plus icon in the top left - Drag the new
Run Scriptphase above theCompile Sourcesphase, expand it and paste the following script:"$SRCROOT/rswift" "$SRCROOT" - Build your project, in Finder you will now see a
R.generated.swiftin the$SRCROOT-folder, drag theR.generated.swiftfiles into your project and uncheckCopy items if needed
Tip: Add the *.generated.swift pattern to your .gitignore file to prevent unnecessary conflicts.
R.swift is also available through Homebrew. This makes it possible to install R.swift globally on your system. Install R.swift by running: brew install rswift. The Homebrew formula is maintained by @tomasharkema.
We'll love contributions, read the contribute docs for info on how to report issues, submit ideas and submit pull requests!
R.swift and R.swift.Library are created by Mathijs Kadijk and released under a MIT License.