React Native Camera Barcode

The screenshot below shows it in action; this was taken on a tablet that was pointed at a monitor displaying several photos. There are a LOT of things that XF does not support out of the box, but are easily achieved via DI or custom renderers. When I tried to get React Hooks working with React Native Camera, I came to the point of creating a separate library for that, called React Native Camera Hooks. React native in the browser. This is a solution based on Zxing: ideacreation/react-native-barcodescanner I guess you have access to all system calls, so these should be available too: iOS. NET and C# versions) in the evaluation version of the SDK. Native modules are a way of bridging native code and React Native code. react-native-video. iOS - Barcode. Hi friends, I am explaining about face detection from scratch using react native and expo. I'm interested in the opinion of React Native from companies who chose to build their mobile apps with React Native and have been doing so for at least a year. With the introduction of react native’s react-native-arkit, it became very easy to build AR apps. A Camera component for React Native. How to Make Barcode Scanner android with React Native How to Make Barcode Scanner android with React Native How to Make Barcode Scanner android with React Na. In start of application there is nice splash screen with logo. Solution for React Native barcode scanning mobile app orientation problems Jun 04, 2019 / CF Mitrah / ReactNative barcode-scanner Now a days smartphone cameras are not only used for snapping photos or recording videos, but also for many purposes like Scanning Documents and Barcodes, Translating Text from one language to another, Augmented. import React, { Component } from 'react' import { Text, View } from 'react-native' class Home extends Component { state = { myState: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Also supports barcode scanning! react-native-camera A camera module for React Native. Based on Expo Kit. 1 best open source rncamera projects. React Native Barcode Scanner, Use the react-native-camera for iOS component to add barcode scanning support to your mobile application. Hello, I'm a Nijat Aliyev, web-developer based on Baku. Key native device capabilities, including camera, geolocation, Touch ID, Bluetooth, pull to refresh, and infinite swipe to go back. Download and open react-webcam. 4 to justify the tradeoff of updating ba. Actually, there is an Ionic 3 QR Scanner plugin, but we decide to use this Barcode plugin that can scan both Barcode and QR code. It uses the same design as React, letting you compose a rich mobile UI from declarative components. 这个如何做的,那位做过有经验的,可以指点一下么. Image capture ; Barcode scanning ; On GitHub. Here is the…. It runs a full Node. React Native Camera Sponsors If you use this library on your commercial/personal projects, you can help us by funding the work on specific issues that you choose by using IssueHunt. getCurrentPosition() (React Native's geolocation polyfill). A camera viewport for React Native. It is inspired by the React-native API, hence it gives a developer the ability to build cross platform applications in Vue. this one) using native Android functionality. This is a React native app which basic functionality is Create/Search barcode and QR code. The app will automatically recognize any code your camera is pointing at. In this article, I will share how to build a web barcode scanner step by step. Use Accusoft Barcode Scanner to scan UPC barcodes and compare prices while shopping or to scan QR codes to take advantage of special offers. react-native-community. We had to write native modules that supported multipart form upload and photo operations. You can use react-native-camera react-native-community/react-native-camera for barcode scanning. 2, please update (can be done via android. Setup and Introduction : React-Native Course Introduction NodeJS Install React-Native & Watchman Visual Studio Install and React-Native Extension Pack React-Native CLI How to use the React-Native Documentation Basic ReactJS Langulage (ES5/6 and JSX) React Component and Basic UI Styling and Theming Debugging / JS—Debugging / Auto-Reload 2. For managed apps, you'll need to run expo install expo-camera. GitHub Gist: instantly share code, notes, and snippets. Developers tell us the documentation is really clear and makes integration quick and simple. iOS - Barcode. getUserMedia navigator. When i launch programm and start scan after 25-30 calls camera app not responding and cras…. expo init Barcodescan Then install react native elements for UI & start the application. Expo Client on GitHub. Scanbot SDK React Native Module. npm コマンドで react-native-cli をインストール。 npm install -g react-native-cli プロジェクトの作成 react-native コマンドを使って初期プロジェクトを作成。 react-native init cameraapp 出来上がった. Setup react-native-barcodescanner. I have work on four apps in React Native. If you want to use the camera with functional components, there is gonna be stateful code involved. The video recorder component that extends from react native camera. A Camera component for React Native supports barcode scanning. ReactJs和React Native的那些事. Scan barcode with ReactNative Expo. Also, this barcode scanning app works wonderfully on mobile devices. Anyone can put a bounty on not only a bug but also on OSS feature requests listed on IssueHunt. * rotation This will rotate the image by the number of degrees specified. Developers can design and write the code using REACT-Native ARkit and inturn, ARKit will render the application based on your device. With the introduction of react native's react-native-arkit, it became very easy to build AR apps. Also reads barcodes. PWAs can easily cover most use cases, including providing offline support and web push notifications - Safari has also recently included support for service workers and will continue to improve on it. Let's use react-native-camera and implement a barcode scanner in react-native. QR Code is known as Quick Response Code is a trademark for two-dimensional barcode. Having it up and running in Android or iOS devices. * rotation This will rotate the image by the number of degrees specified. This does look interesting but I'll stick to vanilla react-native for now. react-native-beautiful-video-recorder The video recorder component that extends from react-native-camera. Why cannot I access the camera? React Native - RN 0. "NativeScript-Vue is a great option if you want to build a native app and enjoy Vue's syntax at the same time. This tutorial is a complete guide to make an app in android for barcode reader. Android Barcode Reader Example. Also supports barcode scanning! react-native-camera A camera module for React Native. Generation of QR Code in React Native is very easy as we just have to install react-native-svg and react-native-qrcode-svg package, which will provide component to make QRCode. Client-side APIs on mobile and desktop. geolocation. You can use react-native-camera react-native-community/react-native-camera for barcode scanning. Required React have React Native Plugins. Barcode Reader Screen implemented with react-native-camera 📸 ! - sahir/react-native-barcode-reader. expo init Barcodescan Then install react native elements for UI & start the application. This component helps you communicate with the native OS through some simple functions so you can use device hardware. Native Tooling Capacitor is the official cross-platform app runtime used to make your Ionic React web app run natively on iOS, Android, Electron, and the web. react-native-image-picker ★4709 - A React Native module that allows you to use the native UIImagePickerController UI to select a photo from the device library or directly from the camera. QuaggaJS is an advanced barcode-reader written in JavaScript. react-native-camera is a comprehensive camera module for React Native that supports photographs, videos, face detection, barcode scanning, and text recognition. react-native-camera receives over 175,000 downloads per month, according to npm , and is part of the React-Native-Community organization. Every android device has the ability to read barcode to decode a lot of information. Magento 2 Mobile POS App(React Native) The Magento 2 Mobile POS(Point Of Sale) App is a native mobile application for your Magento 2 online website. If you want to use the camera with functional components, there is gonna be stateful code involved. Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. NotImplementedException was unhandled by user code"?. When I tried to get React Hooks working with React Native Camera, I came to the point of creating a separate library for that, called React Native Camera Hooks. How to Make Barcode Scanner android with React Native How to Make Barcode Scanner android with React Native How to Make Barcode Scanner android with React Na. The onPropertyChanged should accept two arguments. USA : +1 (845) 418-5206 [email protected] You'll need a SSL certificate for this API to work. In this React Native Camera tutorial, we will create a QR code reader app. Any bluetooth barcode scanner is compatible with TailPOS app as well. Hi friends, I am explaining about face detection from scratch using react native and expo. how to build a React. Like other cross-platform environments, React provides access to native operating system API's and functions through user callable plug-ins. ReactJs和React Native的那些事. RN passes the first-week smell test really well. Get answers to your problems. Linear Barcode, QR Code, DataMatrix, PDF417 and Aztec API scan a single barcode from mobile camera within an App on iPhone using Swift. A camera viewport for React Native. 4, the same version as SDKs 29 and 28. Facebook's most famous framework REACT-NATIVE comes at rescue. NotImplementedException was unhandled by user code"?. A shopper scanning barcode to know more about product. You can use it for. React Native Barcode Scanner Google ⭐ 96 Barcode scanner for react native, which implements barcode detection from Google's Vision API. react-native-barcode-scanner-universal是react-native-barcodescanner和react-native-camera的结合,react-native-barcodescanner应用于android平台,react-native-camera应用于iOS. Here is the main flow for our application Open device native camera. In short mobile app was about having some tool to locate specific warehouse inventory by scanning QR codes. Key native device capabilities, including camera, geolocation, Touch ID, Bluetooth, pull to refresh, and infinite swipe to go back. With the introduction of react native's react-native-arkit, it became very easy to build AR apps. Bar Code Related props onBarCodeRead. Also supports barcode scanning! react-native-camera A camera module for React Native. To evaluate the quality, Mybridge AI considers a variety of factors to determine how useful the projects are for programmers. 整理的一份 React Native 开发中常用的三方组件库大全。 完整的 App 使用React Native开发且功能完整的App。 react-native-camera. All the functions of the application support both RFID and Barcode tags. Cordova wraps your HTML/JavaScript app into a native container which can access the device functions of several platforms. Building a Barcode Scanner in Swift on iOS. Client-side APIs on mobile and desktop. Compare npm package download statistics over time: react native camera vs react native smart barcode. Walmart Pay. React Native Barcode Scanner, Use the react-native-camera for iOS component to add barcode scanning support to your mobile application. Point the camera at the barcode ensuring that the entire barcode is within the white rectangle with rounded edges. 最近在整理一个生成二维码与识别二维码的Demo,在扫描这个功能上查找了很多主流的库,但是大多数库因为年代久远,新版的Xcode连Demo都没办法跑起来了,所以我整理了一下使用 react-native-smart-barcode 实现二维码扫描的功能。. If you are using React Native, you can quickly create a camera app with React Native Camera. React Native is a framework that borrows React's paradigm and design principles to enable fast, cross-platform development of snappy UIs. Hello, I'm a Nijat Aliyev, web-developer based on Baku. react native camera, onBarCodeRead not working, i have installed react-native-camera, the code trigger the cammera, but it doesnot read or spot barcode even with onBarCodeRead function. React Native will detect when a file has a. Magento 2 Mobile POS App(React Native) The Magento 2 Mobile POS(Point Of Sale) App is a native mobile application for your Magento 2 online website. import React, { Component } from 'react' import { Text, View } from 'react-native' class Home extends Component { state = { myState: 'Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. UPC E; CODE 39; CODE 39 MOD 43. IssueHunt 🦉 = OSS Development ⚒ + Bounty Program 💰. Add the following permissions in the AndroidMnifest. Native Directory is a curated list of React Native libraries to help you build your projects. Cordova wraps your HTML/JavaScript app into a native container which can access the device functions of several platforms. The Walmart Mobile App for iPhone and Android lets you browse, search and buy millions of Walmart. Download and open react-webcam. In start of application there is nice splash screen with logo. Icons Configuring icons. IssueHunt is an issue-based bounty platform for open source projects. react-native-video. If however there is no QR-code above the one I want to scan, then it scans. If however there is no QR-code above the one I want to scan, then it scans the correct one, so it seems like it always scans the top QR-code within the cameras view. Users can switch between these seamlessly. react-native-barcode-scanner-universal. QR Code is known as Quick Response Code is a trademark for two-dimensional barcode. react-native-barcode-scanner-universal. In this article, I will share how to build a web barcode scanner step by step. How to Build a Camera App with. js and write below code import { StyleSheet, Text, View,ScrollView, Alert, Vibration } from 'react-native'; import { ListItem, List } from 'react-native-elements'; import { BarCodeScanner, Permissions } from…. You can use react-native-camera react-native-community/react-native-camera for barcode scanning. 0 - a Java package on npm - Libraries. Actually, there is an Ionic 3 QR Scanner plugin, but we decide to use this Barcode plugin that can scan both Barcode and QR code. #opensource. 最近在整理一个生成二维码与识别二维码的Demo,在扫描这个功能上查找了很多主流的库,但是大多数库因为年代久远,新版的Xcode连Demo都没办法跑起来了,所以我整理了一下使用 react-native-smart-barcode 实现二维码扫描的功能。. getUserMedia navigator. Can i read barcode And QR code from my camera using C# in windows form karthik · Hi karthik sin, According to your description, I suggest you using the Bar Code Scanners. A barcode is used to automate the transfer of product information, for eg. the first step is to install react-native-camera into your react-native mobile app. When scanning a QR code, if the code contains a website URL, you will automatically be taken to the site. The React Native camera library supports photographs, videos, face detection, barcode scanning, and text recognition. Android - Why am I getting a black screen? Xamarin. Create a new Expo Project with a blank template. Developers can also build their own reusable components based on React Native. Hello, I’m a Nijat Aliyev, web-developer based on Baku. It takes us 3 months to develop it. Although at present, we cannot provide you with the DataExplorer product's roadmap information, it is unlikely that new features will be introduced in the near future. After many suggestions from the community, we decided to feature NativeScript and React Native in this blog post. About a year ago we started development of Web based mobile application development targeting to run in mobile web browsers. Start the actual scanning process to start the camera and look. Now with GS1 Databar! A fully functional barcode reader that scans over 30 common 1D and 2D barcode types, including scanning UPC codes and QR codes. If you are using the device camera for scanning, add the "NSCameraUsageDescription" key with a description on how your app will use the camera (for example: Scanning barcodes"). react-native-camera is now part of the Tidelift Subscription react-native-camera is a comprehensive camera module for React Native that supports photographs, videos, face detection, barcode scanning, and text. its price, from the product to an electronic system such as a cash register. Posted by Manoj on August 18, 2017. In this article, I will share how to build a web barcode scanner step by step. Critical native UI components, including maps, slider, progress circle, progress bar, tab container, and barcode scanner. When I tried to get React Hooks working with React Native Camera, I came to the point of creating a separate library for that, called React Native Camera Hooks. I have rich experience in web site design & building and customization. If however there is no QR-code above the one I want to scan, then it scans. The Walmart Mobile App for iPhone and Android lets you browse, search and buy millions of Walmart. react-native-vector-icons react-native-sound react-native-barcodescanner react-native-camera and did not find docs on those features yet. More than 1 year has passed since last update. data - a textual representation of the barcode, if available. Scan barcode with ReactNative Expo. js environment and already has all of npm's 400,000 packages pre-installed, including nicolaslopezj-react-native-camera with all npm packages installed. It uses the React framework and offers large amount of inbuilt components and APIs. When you specify a different format (like 16:9 video) on your 3:2 or 4:3 camera sensor, this changes the format's original native value of Crop Factor and Equivalent Focal Length numbers, and the field of view too of course. The onPropertyChanged method is executed whenever the state of the barcode picker changes. 首先我们要借助第三方插件react-native-barcode-scanner-universal来实现跨平台二维码扫描。 2. React Native is the best image cropper library and it surely gives you a rich image shopping experience. You can use it for. r/reactnative: A community for learning and developing native mobile applications using React Native by Facebook. react-native-motion-manager CMMotionManager wrapper for react-native, exposing Accelerometer, Gyroscope, and Magnetometer. Find render() function to add a button and a canvas. mediaDevices. Walmart Pay. Add the following permissions in the AndroidMnifest. Native Directory is a curated list of 426 React Native libraries to help you build your projects. Events that can invoke this method include changes to the torch, camera facing, recognition mode and relative zoom. All the functions of the application support both RFID and Barcode tags. Posted by Manoj on August 18, 2017. 7 230 ★ — A Camera component for React Native. extension and load the relevant platform file when required from other components. Here is the main flow for our application Open device native camera. its price, from the product to an electronic system such as a cash register. Now with GS1 Databar! A fully functional barcode reader that scans over 30 common 1D and 2D barcode types, including scanning UPC codes and QR codes. Implementing a ‘Forgot Password’ feature in React Native with Firebase About Heartbeat Latest Stories Archive. js, React. Linear Barcode, QR Code, DataMatrix, PDF417 and Aztec API scan a single barcode from mobile camera within an App on iPhone using Swift. The DCTrackMobile system is a Android based RFID/Barcode solution used for tracking assets throughout its life cycle. Expo SDK v30. ), the MX-100, MX-1000, or MX-1502. A shopper scanning barcode to know more about product. Compare npm package download statistics over time: react native camera vs react native smart barcode. The onPropertyChanged method is executed whenever the state of the barcode picker changes. Create a new Expo Project with a blank template. React Native Image Picker. Once installed, import Camera from react-native-openalpr and add it to your React Native project. React Native is a framework that allows us to build native mobile apps using JavaScript and React. Native Directory is a curated list of 426 React Native libraries to help you build your projects. Previously I wrote how to use the device camera in Ionic Framework, but how might we do the same with React Native? Lucky for us, with React Native, there is an external component that lets us use the camera. This is a solution based on Zxing: ideacreation/react-native-barcodescanner I guess you have access to all system calls, so these should be available too: iOS. NET and C# versions) in the evaluation version of the SDK. Generate QR Code in React Native Android iOS App Example Tutorial admin January 23, 2018 January 23, 2018 React Native QR Code also known as Quick Response Code is a trademark for two-dimensional barcode. Now you can your point of sale system as a mobile application supporting all the hardware capabilities. In this article, I will share how to build a web barcode scanner step by step. When your platform-specific code is more complex, you should consider splitting the code out into separate files. We will implement Android barcode reader app with the use of ZXing (Zebra Crossing) library, which will use to scan barcode in Android. Hi friends, I am explaining about face detection from scratch using react native and expo. 7 (if you run on 1. I was looking for a barcode scanner library for React Native. A component for react-native, as seen in react-native-login. Built-in rear camera of the tablet can be used as a barcode scanner. The react native camera library supports photographs, videos, face detection, barcode scanning, and text recognition. If you're using Expo, you don't need to do anything extra, but if it's vanilla React Native project, you need link the library as described in the getting started guide. ), the MX-100, MX-1000, or MX-1502. This is a solution based on Zxing: ideacreation/react-native-barcodescanner I guess you have access to all system calls, so these should be available too: iOS. Implementing a 'Forgot Password' feature in React Native with Firebase About Heartbeat Latest Stories Archive. To get the android and ios device information like UDID, version, build, operating system etc - We can get this information by using react-native-device-info plugin provided by react native. React Native Camera The comprehensive camera module for React Native. Using the cmbSDK, a single application code base enables scanning across our supported devices: a retail mobile device (smartphone, tablet, iPod, etc. Configuration. Native Directory is a curated list of React Native libraries to help you build your projects. Generate QR Code in React Native Android iOS App Example Tutorial admin January 23, 2018 January 23, 2018 React Native QR Code also known as Quick Response Code is a trademark for two-dimensional barcode. The react-native-camera component can have children, so you can just place elements inside the camera component. Access to device capabilities like camera, location, notifications, sensors, haptics, and much more , all with cross-platform APIs. The video recorder component that extends from react native camera. It will be able to read QR codes in real time and render their content to the screen at the time of detection. Any bluetooth barcode scanner is compatible with TailPOS app as well. This is a React native app which basic functionality is Create/Search barcode and QR code. The screenshot below shows it in action; this was taken on a tablet that was pointed at a monitor displaying several photos. Solution for React Native barcode scanning mobile app orientation problems Jun 04, 2019 / CF Mitrah / ReactNative barcode-scanner Now a days smartphone cameras are not only used for snapping photos or recording videos, but also for many purposes like Scanning Documents and Barcodes, Translating Text from one language to another, Augmented. This tutorial shows you how to create an example of Ionic 3, Angular 4 and Cordova Barcode and QR code Scanner using Ionic 3 Native Barcode Scanner. To make use of the react native camera library, follow this guide here. First of all lets have a look what sort of barcode types supported by the react native camera. Cordova wraps your HTML/JavaScript app into a native container which can access the device functions of several platforms. With BarCode Reader SDK you can use webcam as barcode reader from your application. Let's use react-native-camera and implement a barcode scanner in react-native. This is a component used in the React Native…. The onPropertyChanged should accept two arguments. To make use of the react native camera library, follow this guide here. Scan barcode with ReactNative Expo. o Print receipts. 最近在整理一个生成二维码与识别二维码的Demo,在扫描这个功能上查找了很多主流的库,但是大多数库因为年代久远,新版的Xcode连Demo都没办法跑起来了,所以我整理了一下使用 react-native-smart-barcode 实现二维码扫描的功能。. Now with GS1 Databar! A fully functional barcode reader that scans over 30 common 1D and 2D barcode types, including scanning UPC codes and QR codes. - Social integration. 3 ReactNative for Web 3. react-native-camera. 2, please update (can be done via android. Implementing a ‘Forgot Password’ feature in React Native with Firebase About Heartbeat Latest Stories Archive. It works for both iOS & Android. We started off with React Native few months back and I must say that it is a very powerful option for app development and fun to work with. Unlike hybrid, progressive web, or mobile web apps, which rely on web technologies and offer much less than fully mobile apps, React Native offers. react-native-camera is a comprehensive camera module for React Native that supports photographs, videos, face detection, barcode scanning, and text recognition. getCurrentPosition() (React Native's geolocation polyfill). React Native Barcode Scanner, Use the react-native-camera for iOS component to add barcode scanning support to your mobile application. Developers can design and write the code using REACT-Native ARkit and inturn, ARKit will render the application based on your device. Track Faces and Barcodes This page is a walkthrough of how to build an app that uses the rear facing camera to show a view of the detected faces and barcodes in front of you. Mobile barcode scanning The mobile app UI can request access to a mobile device's camera to scan and store barcodes in a string field. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. One such image cropping tool is to React to Native Android Image Cropper. React Native will detect when a file has a. " Stephen Fluin Developer Advocate for Angular @ Google Evan Payne Senior Front-end Software Engineer @ Netcentric Evan You Creator of Vue. So when my. A camera viewport for React Native. Also supports barcode scanning! React Native Camera DocsFollow our docs here. Posted by Manoj on August 18, 2017. QuaggaJS is an advanced barcode-reader written in JavaScript. BarCodeType, data: string }, where the type refers to the bar code type that was scanned and the data is the information encoded in the bar code (in this case of QR codes, this is often a URL). I have work on four apps in React Native. 6 you will get an error on "_cameras = new HashMap<>();") With iOS 10 and higher you need to add the "Privacy - Camera Usage. If however there is no QR-code above the one I want to scan, then it scans. With SDK 29, we made the decision not to update to React Native 0. QR Code is known as Quick Response Code is a trademark for two-dimensional barcode. react-native-vector-icons react-native-sound react-native-barcodescanner react-native-camera and did not find docs on those features yet. 4 React Native Drawer 5. Now with GS1 Databar! A fully functional barcode reader that scans over 30 common 1D and 2D barcode types, including scanning UPC codes and QR codes. Add the following permissions in the AndroidMnifest. I have rich experience in web site design & building and customization. mediaDevices. (React Native: 11, React: 11) React is an open source JavaScript library built by Facebook, providing a view for data rendered as HTML. react-native-beautiful-video-recorder The video recorder component that extends from react-native-camera. 4, the same version as SDKs 29 and 28. react-native-video. In this example, you will make the Barcode and QR Code Scanner Using React Native Camera. Forms - Why am I getting "System. Add the following permissions in the AndroidMnifest. Generate QR Code in React Native Android iOS App Example Tutorial admin January 23, 2018 January 23, 2018 React Native QR Code also known as Quick Response Code is a trademark for two-dimensional barcode. React Native is a framework that allows us to build native mobile apps using JavaScript and React. 6 you will get an error on "_cameras = new HashMap<>();") With iOS 10 and higher you need to add the "Privacy - Camera Usage. Users can switch between these seamlessly. With the introduction of react native's react-native-arkit, it became very easy to build AR apps. Including photographs, videos, and barcode scanning! android build tools has been bumped to 25. It uses the same design as React, letting you compose a rich mobile UI from declarative components. This article shares how to replace the default barcode reading function with Dynamsoft Barcode Reader for Android. Will call the specified method when a barcode is detected in the camera's view. While there are no known technical limitations to using Ionic React with Cordova plugins, Capacitor is officially recommended. react-native-material-kit ★4124 - Bringing Material Design to React Native. This is part of the series React Native for Beginners and this article is the first installment towards it. HOW THE APP WORKS To scan a QR code or barcode simply open the app, point the camera at the code, and you're done! There is no need to take a photo or press a button. Track Faces and Barcodes This page is a walkthrough of how to build an app that uses the rear facing camera to show a view of the detected faces and barcodes in front of you. A QR code scanner component for React Native built on top of react-native-camera by Lochlan Wansbrough. * It will add GPS metadata to the image. Also supports barcode scanning! react-native-camera A camera module for React Native. In addition, if you would like to scan qr codes , you can use react. A component for react-native, as seen in react-native-login. 首先我们要借助第三方插件react-native-barcode-scanner-universal来实现跨平台二维码扫描。 2. You have Audio, Video, Accelerometer, Gyroscope, Magnetometer and iBeacon support from these packages. Discover that the Cognex Mobile Barcode SDK (cmbSDK) unifies barcode scanning functionality throughout Cognex Mobile Solutions. The method for getting access to camera was initially navigator. Hello, I'm a Nijat Aliyev, web-developer based on Baku. One of them is react native camera kit. The fact-checkers, whose work is more and more important for those who prefer facts over lies, police the line between fact and falsehood on a day-to-day basis, and do a great job. Today, my small contribution is to pass along a very good overview that reflects on one of Trump’s favorite overarching falsehoods. Namely: Trump describes an America in which everything was going down the tubes under  Obama, which is why we needed Trump to make America great again. And he claims that this project has come to fruition, with America setting records for prosperity under his leadership and guidance. “Obama bad; Trump good” is pretty much his analysis in all areas and measurement of U.S. activity, especially economically. Even if this were true, it would reflect poorly on Trump’s character, but it has the added problem of being false, a big lie made up of many small ones. Personally, I don’t assume that all economic measurements directly reflect the leadership of whoever occupies the Oval Office, nor am I smart enough to figure out what causes what in the economy. But the idea that presidents get the credit or the blame for the economy during their tenure is a political fact of life. Trump, in his adorable, immodest mendacity, not only claims credit for everything good that happens in the economy, but tells people, literally and specifically, that they have to vote for him even if they hate him, because without his guidance, their 401(k) accounts “will go down the tubes.” That would be offensive even if it were true, but it is utterly false. The stock market has been on a 10-year run of steady gains that began in 2009, the year Barack Obama was inaugurated. But why would anyone care about that? It’s only an unarguable, stubborn fact. Still, speaking of facts, there are so many measurements and indicators of how the economy is doing, that those not committed to an honest investigation can find evidence for whatever they want to believe. Trump and his most committed followers want to believe that everything was terrible under Barack Obama and great under Trump. That’s baloney. Anyone who believes that believes something false. And a series of charts and graphs published Monday in the Washington Post and explained by Economics Correspondent Heather Long provides the data that tells the tale. The details are complicated. Click through to the link above and you’ll learn much. But the overview is pretty simply this: The U.S. economy had a major meltdown in the last year of the George W. Bush presidency. Again, I’m not smart enough to know how much of this was Bush’s “fault.” But he had been in office for six years when the trouble started. So, if it’s ever reasonable to hold a president accountable for the performance of the economy, the timeline is bad for Bush. GDP growth went negative. Job growth fell sharply and then went negative. Median household income shrank. The Dow Jones Industrial Average dropped by more than 5,000 points! U.S. manufacturing output plunged, as did average home values, as did average hourly wages, as did measures of consumer confidence and most other indicators of economic health. (Backup for that is contained in the Post piece I linked to above.) Barack Obama inherited that mess of falling numbers, which continued during his first year in office, 2009, as he put in place policies designed to turn it around. By 2010, Obama’s second year, pretty much all of the negative numbers had turned positive. By the time Obama was up for reelection in 2012, all of them were headed in the right direction, which is certainly among the reasons voters gave him a second term by a solid (not landslide) margin. Basically, all of those good numbers continued throughout the second Obama term. The U.S. GDP, probably the single best measure of how the economy is doing, grew by 2.9 percent in 2015, which was Obama’s seventh year in office and was the best GDP growth number since before the crash of the late Bush years. GDP growth slowed to 1.6 percent in 2016, which may have been among the indicators that supported Trump’s campaign-year argument that everything was going to hell and only he could fix it. During the first year of Trump, GDP growth grew to 2.4 percent, which is decent but not great and anyway, a reasonable person would acknowledge that — to the degree that economic performance is to the credit or blame of the president — the performance in the first year of a new president is a mixture of the old and new policies. In Trump’s second year, 2018, the GDP grew 2.9 percent, equaling Obama’s best year, and so far in 2019, the growth rate has fallen to 2.1 percent, a mediocre number and a decline for which Trump presumably accepts no responsibility and blames either Nancy Pelosi, Ilhan Omar or, if he can swing it, Barack Obama. I suppose it’s natural for a president to want to take credit for everything good that happens on his (or someday her) watch, but not the blame for anything bad. Trump is more blatant about this than most. If we judge by his bad but remarkably steady approval ratings (today, according to the average maintained by 538.com, it’s 41.9 approval/ 53.7 disapproval) the pretty-good economy is not winning him new supporters, nor is his constant exaggeration of his accomplishments costing him many old ones). I already offered it above, but the full Washington Post workup of these numbers, and commentary/explanation by economics correspondent Heather Long, are here. On a related matter, if you care about what used to be called fiscal conservatism, which is the belief that federal debt and deficit matter, here’s a New York Times analysis, based on Congressional Budget Office data, suggesting that the annual budget deficit (that’s the amount the government borrows every year reflecting that amount by which federal spending exceeds revenues) which fell steadily during the Obama years, from a peak of $1.4 trillion at the beginning of the Obama administration, to $585 billion in 2016 (Obama’s last year in office), will be back up to $960 billion this fiscal year, and back over $1 trillion in 2020. (Here’s the New York Times piece detailing those numbers.) Trump is currently floating various tax cuts for the rich and the poor that will presumably worsen those projections, if passed. As the Times piece reported: