How To Automate Asset Management in Your iOS Apps

Autocomplete resources like images, fonts and segues in Swift projects.

Demo

Managing Images

Currently you type:

 let myImage = UIImage(named: "MyImage")

With R.swift it becomes:

 let rImage = R.image.myImage()

Managing Colors

Currently you type:

  let myColor = UIColor(named: "myColor")

With R.swift it becomes:

 let rColor = R.color.myColor

Managing Localization

Currently you type:

  let myString = String(format: NSLocalizedString("Hello", comment: ""))

With R.swift it becomes:

  let rString = R.string.localizable.hello()

How to set up

1. Install it via CocoaPods by running pod install after adding this line to the Podfile:

pod ‘R.swift’

2. Add a new run script phase as follows:

3. Move it above the “Compile Sources,” as shown below:

The reason for is that the library will generate a R.generated.swift file, which will have all the properties that reference the assets used in our app. We want it generated before the app compiles all the files.

4. Paste the following script:

if [ $ACTION != "indexbuild" ]; then
  "$PODS_ROOT/R.swift/rswift" generate "$SRCROOT/R.generated.swift"
fi

5. Add $TEMP_DIR/rswift-lastrun to Input Files and $SRCROOT/R.generated.swift to Output Files like this:

6. Build the app and open the project’s folder we will see the R.generated.swift file:

7. Drag and drop the file into the Xcode project and leave “Copy items if needed” unchecked: