Now that you have successfully run the app, let's modify it. Open App. The application should reload automatically once you save your changes. Expo also has docs you can reference if you have questions specific to the tool.
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You can also ask for help at Expo forums. These tools help you get started quickly, but before committing to building your app with Expo CLI, read about the limitations. If you have a problem with Expo, before creating a new issue, please see if there's an existing issue about it:.
If you're curious to learn more about React Native, continue on to the Tutorial. Expo CLI allows you to run your React Native app on a physical device without setting up a development environment. 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. Because you don't build any native code when using Expo to create a project, it's not possible to include custom native modules beyond the React Native APIs and components that are available in the Expo client app.
If you know that you'll eventually need to include your own native code, Expo is still a good way to get started. In that case you'll need to " eject " eventually to create your own native builds.
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Expo CLI configures your project to use the most recent React Native version that is supported by the Expo client app. The Expo client app usually gains support for a given React Native version about a week after the React Native version is released as stable. You can check this document to find out what versions are supported.
If you're integrating React Native into an existing project, you'll want to skip Expo CLI and go directly to setting up the native build environment.
What do you need help with?
Follow these instructions if you need to build native code in your project. For example, if you are integrating React Native into an existing application, or if you "ejected" from Expo , you'll need this section. The instructions are a bit different depending on your development operating system, and whether you want to start developing for iOS or Android. If you want to develop for both Android and iOS, that's fine - you can pick one to start with, since the setup is a bit different.
A Mac is required to build projects with native code for iOS. You can follow the Quick Start to learn how to build your app using Expo instead. While you can use any editor of your choice to develop your app, you will need to install Xcode in order to set up the necessary tooling to build your React Native app for iOS.
While you can use any editor of your choice to develop your app, you will need to install Android Studio in order to set up the necessary tooling to build your React Native app for Android.
We recommend installing Node and Watchman using Homebrew. Run the following commands in a Terminal after installing Homebrew:. Watchman is a tool by Facebook for watching changes in the filesystem. It is highly recommended you install it for better performance. We recommend installing JDK using Homebrew.https://houbifavil.tk
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Follow the installation instructions for your Linux distribution to install Node 8. We recommend installing Node and Python2 via Chocolatey , a popular package manager for Windows. Both can be installed using Chocolatey. If you have already installed Node on your system, make sure it is Node 8.
If you already have a JDK on your system, make sure it is version 8 or newer. You can find additional installation options on Node's Downloads page. The easiest way to install Xcode is via the Mac App Store. You will also need to install the Xcode Command Line Tools.
Open Xcode, then choose "Preferences Go to the Locations panel and install the tools by selecting the most recent version in the Command Line Tools dropdown. Select a simulator with the corresponding version of iOS you wish to use. You can use a Ruby Version manager, however we recommend that you use the standard Ruby available on macOS unless you know what you're doing. Using the default Ruby install will require you to use sudo when installing gems.
This is only an issue for the duration of the gem installation, though. For more information, please visit CocoaPods Getting Started guide. Setting up your development environment can be somewhat tedious if you're new to Android development. If you're already familiar with Android development, there are a few things you may need to configure.
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In either case, please make sure to carefully follow the next few steps. Download and install Android Studio. Choose a "Custom" setup when prompted to select an installation type.
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For a complete list of Guides visit the Foundations section, where you will find in-depth knowledge about the principles and techniques behind the Arduino platform. Making the Arduino StarterKit projects and reading the book 'Getting Started with Arduino' are great ways to start learning and tinkering with coding and electronics. Are you a teacher looking to bring some innovation into your classroom? Arduino Education is committed to empowering educators with the necessary hardware and software tools to create a more hands-on learning experience.
Take your students on a fun and inspiring journey through the world of programming and electronics. Code samples in the guide are released into the public domain. Get started today! Learn Arduino Read an introduction on what is Arduino and why you'd want to use it. Libraries : Using and installing Arduino Libraries. Cores : Need to add a new board to your Arduino Software?