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custom-fonts.md

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Instructions for adding custom fonts to your ignite-bowser app:

For Expo Projects

You're lucky. Most of the work is done for you. Just download the TTF or OTF files you want to use, place them in ./app/theme/fonts/ and load them in the index.ts file in that same directory.

ignote-bowser integrated expo-fonts according to this guide.

For Non-Expo Projects

  1. Find a font in TTF or OTF format that you like and put it in ./assets/fonts/. I picked this one.
  2. Now run npx react-native link. Even though we're past react native 0.60 we can still use this command to link the fonts. This is a one-way operation. You'll have to remove fonts yourself later if you want to remove them from your app. This will add items to your xcode project and Info.plist file as well as putting some files in place for android to bundle (specifically, it will move the font files to `./android/app/src/main/assets/).
  3. Both iOS and Android changes must be committed to source control, but sometimes other common libraries like react-native-vector-icons may mess with this process and add some fonts you don't intend to ship. Make sure to review these changes carefully before pushing any changes to source control.
  4. The tricky part is next: knowing what font family to use. iOS uses the family name like {fontFamily: 'ShadowsIntoLight'} whereas on android, you must include all the different variations of the font you will use and reference them by their filename. So I downloaded ShadowsIntoLight-Regular.ttf that means android must use {fontFamily: 'ShadowsIntoLight-Regular'} (yes, it's case sensitive 🙄). There are components to help you deal with this or you can roll your own based on your needs and something like:
const CUSTOM_FONT_TEXT: TextStyle = {
  fontFamily: Platform.select({
    ios: "ShadowsIntoLight", // The font family name
    android: "ShadowsIntoLight-Regular", // The file name
  }),
  // ... whatever else
}