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react-native/docs/RunningOnDeviceIOS.md
Andrew Sardone d92b3b3e9b Clarify --dev flag for react-native-bundle 
Given some [confusion around `react-native bundle`'s `--dev` flag][1],
this hopes to clear somet things up int he docs by…

- Removing mentions of the `__DEV__` environment variable
    - I think it confuses the user on how to work with the command-line
      flag, and frankly it seems like an internal implementation detail
      from the perspective of react-native-cli. We should focus on what
      the `--dev` flag does (e.g., toggles dev warnings, performance
      optimizations).
- Adding a minimal note about native-land's build configurations and how
  that should be checked for production builds

[1]: https://github.com/facebook/react-native/issues/4181
2015-11-23 08:21:45 -05:00

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running-on-device-ios Running On Device docs Guides (iOS) docs/running-on-device-ios.html embedded-app-ios

Note that running on device requires Apple Developer account and provisioning your iPhone. This guide covers only React Native specific topic.

Accessing development server from device

You can iterate quickly on device using development server. To do that, your laptop and your phone have to be on the same wifi network.

  1. Open AwesomeApp/ios/AwesomeApp/AppDelegate.m
  2. Change the IP in the URL from localhost to your laptop's IP. On Mac, you can find the IP address in System Preferences / Network.
  3. In Xcode select your phone as build target and press "Build and run"

Hint

Shake the device to open development menu (reload, debug, etc.)

Using offline bundle

You can also pack all the JavaScript code within the app itself. This way you can test it without development server running and submit the app to the AppStore.

  1. Open AwesomeApp/ios/AwesomeApp/AppDelegate.m
  2. Follow the instructions for "OPTION 2":
  • Uncomment jsCodeLocation = [[NSBundle mainBundle] ...
  • Run the react-native bundle command in terminal from the root directory of your app

The bundle script supports a couple of flags:

  • --dev - a boolean with a default value of true. With the --dev true flag, the bundled JavaScript code turns on useful development warnings and limits performance optimizations. For production it is recommended to pass --dev false. Also for production, be sure to have your native build configuration set to Release (e.g., Xcode's Release configuration for iOS and gradle's assembleRelease task for Android) in order to disable things like the shake-to-show developer menu.
  • --minify - pipe the JS code through UglifyJS.

Note that on 0.14 we'll change the API of react-native bundle. The major changes are:

  • API is now entry-file <path> based instead of url based.
  • Need to specify which platform you're bundling for --platform <ios|android>.
  • Option --out has been renamed for --bundle-output.
  • Source maps are no longer automatically generated. Need to specify --sourcemap-output <path>

Disabling in-app developer menu

When building your app for production, your app's scheme should be set to Release as detailed in the debugging documentation in order to disable the in-app developer menu.

Troubleshooting

If curl command fails make sure the packager is running. Also try adding --ipv4 flag to the end of it.

If you started your project a while ago, main.jsbundle might not be included into Xcode project. To add it, right click on your project directory and click "Add Files to ..." - choose the main.jsbundle file that you generated.