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runningondevice
Running On Device
docs
Guides
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embedded-app

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 iOS/AppDelegate.m
  2. Change the IP in the URL from localhost to your laptop's IP
  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 iOS/AppDelegate.m
  2. Follow the instructions for "OPTION 2":
  • Uncomment jsCodeLocation = [[NSBundle mainBundle] ...
  • Run given curl command in terminal from the root directory of your app

Packager supports a couple of options:

  • dev (true by default) - sets the value of __DEV__ variable. When true it turns on a bunch of useful development warnings. For production it is recommended to use dev=false.
  • minify (false by default) - whenever or not to pipe the JS code through UglifyJS.

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.