![]() The React Native CLI will automatically open a terminal and start the server. Select the device you want to build and run the app on, then click the build button. In my case, the name of my iPhone is “iPhone.” You may see a different name for your device, such as “Tony’s iPhone.” A USB connector to connect the device to your Mac computerĪfter connecting the iPhone, the Xcode will show the connected devices as a target:.An iOS device the macOS only allows you to run iOS apps on iOS devices (iPhone, iPad, Apple TV, etc.).To run and build a React Native on a real device, you must have: I prefer always to use the device because it gives me a more complete idea of how the app works on the user’s end. For example, you can’t access the device camera when using a simulator. Simulators are limited and don’t always represent the app with total accuracy. The most obvious benefit to running you app on the device is that it enables you to experience your app the way the user sees it. Running a React Native app on a real iOS device However, sometimes it’s necessary to test the accuracy of the UI on a real device. It’s a good practice to use the simulator to run and test the app. ![]() You can build the app by going to the tab navigator ( Product→ Build) or using the shortcut ⌘ + B: In the iOS folder, select appName.xcodeproject or appName.xcodeworkspace if you have one. Inside Xcode navigate to File → Open and browse to your project directory. The second way to build and run a React Native app is to use Xcode directly, which is the method I use. Then, run the CLI command with -device"iPhone name": react-native run-ios -device "Said's iPhone" If you want to run your app on a device, you must first make sure your device is connected via USB to your computer. Here’s how to tell the CLI which simulator you want to run the app on: react-native run-ios -simulator "iPhone X" If you don’t specify a simulator, the CLI uses the default one it finds on Xcode. You can also use npx: npx react-native run-iosīasically, this runs bunch of scripts in the background that interact and instruct Xcode to run and lunch the simulator. When you first install a React Native app using the CLI, it provides simple instructions and allows you to start, build, and run the app in one simple command: react-native run-ios The React Native CLI is a simple and straightforward way to get your React Native app running. Then, we’ll do the same directly on a real device. Let’s walk through how to build and run a React Native app with the React Native CLI. Using Xcode directly gives you a clear picture and helps you identify the cause of a given issue
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