There are many great libraries available outside of the Expo SDK, and you may even want to build your own native library. The tradeoff is that the Expo Go app does not allow you to add custom native code - you can only use native modules built into the Expo SDK. Expo Go makes this possible by including a feature-rich native runtime made up of every module in the Expo SDK, so all you need to do to use a module is install the package with npx expo install and reload your app. The Expo Go app is a great tool to get started - it exists to help developers quickly get projects off the ground, to experiment with ideas (such as on Snack) and share their work with minimal friction. Once you've set these up, you can launch your app on an Android Virtual Device by running npm run android, or on the iOS Simulator by running npm run ios (macOS only). ![]() If you want to run your app on the iOS Simulator or an Android Virtual Device, please refer to the instructions for "React Native CLI Quickstart" to learn how to install Xcode or set up your Android development environment. Running your app on a simulator or virtual deviceĮxpo Go allows you to run your React Native app on a physical device without installing iOS and Android native SDKs. If you're curious to learn more about React Native, check out the Introduction to React Native. If you have a problem with Expo, before creating a new issue, please see if there's an existing issue about it in the Expo issues. You can also ask for help on the Expo Discord. Now what?Įxpo also has docs you can reference if you have questions specific to the tool. That's it!Ĭongratulations! You've successfully run and modified your first React Native app. The application should reload automatically once you save your changes. Open App.js in your text editor of choice and edit some lines. Now that you have successfully run the app, let's modify it. On iOS, use the built-in QR code scanner of the default iOS Camera app. On Android, use the Expo Go app to scan the QR code from your terminal to open your project. Install the Expo Go app on your iOS or Android phone and connect to the same wireless network as your computer. You can download Xcode via the AppStore icon of the El Capitan Virtual Machine.This will start a development server for you. (this is not dual boot, the VM runs like any application on your desktop).Ĭonsidering you will choose El Capitan, after installation is completed, go through the normal Xcode installation process inside it, because it will get the correct and corresponding Xcode version for it from Apple. Since it is a virtual machine, your current Mojave System will remain intact, and El Capitan will run on it like if it was any normal Application. VMWare Fusion for MacOS is also free, you can download it here:Īfter downloading, use the MacOS Install DMG on VMware Fusion (which has a wizard and installs the system just by dragging the DMG install file on it) Here is the Apple Support download link for MacOS installs, scroll down the page and click " load more results" button until you find the needed MacOS version (Sierra, El capitan, whatever). ![]() You can download any older official MacOS version installations freely from Apple Support, and install the downloaded DMG image right on VMWare, very easy. The good news is that Apple MacOS license permits you to create any VM and reinstall older MacOS/OSX versions inside the current version, and use both the older and the current simultaneously. ![]() You can do it with VM Ware Fusion for MacOS. Use it to compile or migrate your code to current/newer Xcode syntax, or keep working on it using the older Xcode directly inside the VM on your current MacOS Mojave machine. In short, you can't install too older Xcode versions on the current MacOS versions, you can only install the most recent Xcode versions.īut you need Xcode 8 (and I think it runs on El Capitan).Ĭonsidering you must use an older Xcode which cannot be installed on your current system ( I have the same situation, which you posted the Xcode Swift3 message), the easier solution is to install an older MacOS version inside a Virtual Machine on your current macOS, and install the older Xcode on it.Įg: If you use Mojave, create a virtual machine of El Capitan and install the older Xcode 8 on it.
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