Running your app on an iOS simulator

Thanks to Expo, running your app in the Xcode simulator only takes a few clicks. To avoid potential issues, it's easiest to make sure your simulator is already running before you attempt to open an Expo-based React Native app in a simulator:

  1. Open Xcode.
  2. Open the Simulator from the menu bar: Xcode | Open Developer Tool | Simulator:
  1. Wait until the simulator has loaded the operating system:
  1. In the Expo Developer Tools browser window, select Run on iOS Simulator.
  2. The first time you run a React Native ...

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