I saw 'RCTSRWebSocket' in iOS version React Native project, but I can't find any 'import' of this lib in whole project. so what's the role of RCTSRWebSocket in React Native? I guess it's be used to connect Terminal and Simulator?
It's one of the fundamental native modules of React Native.
It's used for dual simultaneous communication, at least, with the bundler service.
Android also has this module (Java implementation) for the same purpose.
Related
I'm currently programming a React Native app (expo) with Visual Studio Code.
For testing I'm using the iOS simulator.
Until now the setup has worked fine. But now I have a problem with debugging my application. When I want to create a new launch.json file, there is no React Native environment in the dropdown list (see picture below).
I already tried to manually add the launch.json file. But when I want to add a configuration there is also no React Native entry available.
Can anyone please help me?
For debugging I installed the React Native Tools Extension (I also tried differnet versions).
Version Info:
macOS Big Sure: 11.3.1
VS Code: 1.61.2
React Native Tools: 1.7.1
The best way for debugging react-native applications is using a react-native-debugger tool, check out the link below for installation and get started with this amazing community-driven tool:
React-Native-Debugger
As the title implies, I tried to load a React Native application (version 0.60.4) in my native iOS Share Extension but got the following error: sharedApplication is unavailable: not available on iOS (App Extension)
It seems React-Core (and other libraries like FBSDK) are using sharedApplication which isn't known inside the Share Extension 'architecture'?
I have tried using this sample project but it doesn't compile out of the box.
It uses React Native v0.15 which perhaps worked at the time.
Does anyone have an idea how to implement the latest React Native version inside an iOS Share Extension?
Is it possible to manually link a library in a react native app when developing on a Linux (Ubuntu) device without manually building the app (I am using the Expo client to test and debug). Because I am on a Linux device, I do not have XCode, and all of the instructions I have found only show how to link libraries using XCode, and they all seem to assume that I have built the app already, or give instructions for building the app (which don't apply to me).
The reason I am asking is I am trying to test the FB login button in my app, but after installing and linking the react-native-fbsdk library, opening the login page in my app results in an error: Invariant Violation: Native component for "RCTFBLoginButton" does not exist". The closest/simplest answer I have found so far seems like it should be the answer in this question, but again it requires XCode, and I'm not sure how to emulate those commands in the command line (or whatever way they can be done).
When using expo, you should use their facebook implementation.
I had a lot of trouble using the login with fbsdk, and the expo sdk is doing the job quite easier.
I tried searching in previous questions, but I did not find it. I made the mistake of using Create React Native App projects. I am trying to do react native link. I did npm i --save. I get an error
react-native link can not be used in Create React Native App projects. If you need to include a library that relies on custom native code, you might have to eject first. See https://github.com/react-community/create-react-native-app/blob/master/EJECTING.md for more information.
I read this and sadly I am completely at a lost. I am using visual studio code and not xcode.
The error is exactly as it states. You cannot link assets and libraries that require linking unless you eject the project from Create React App and get the native project files. Ejecting gives you the native code and with that, you can use Xcode to link libraries with native code.
Create React App is built on Expo, which aims to allow you to develop apps, especially iOS apps, on any platform. But Expo comes with its restrictions due to the very nature of what it accomplishes.
Thus, the problem arises when you want to link platform dependent libraries that require Xcode in iOS's case. Xcode is the proprietary - and really, the only way, to build Apple-based projects that require external libraries because they require APIs and environments only available with it. This was one the huge reasons Expo arose, to allow people to build apps with React Native without having Xcode, but it has its limitations.
So, you cannot use a library that requires linking with native code if you do not have Mac OS because APIs and tools needed for it are only offered on Mac OS.
Visit https://developers.google.com/maps/ no library for react native
!