file-type

React Native SVG资源插件的使用教程及安装说明

下载需积分: 50 | 395KB | 更新于2024-11-20 | 27 浏览量 | 1 下载量 举报 收藏
download 立即下载
此插件通过编译时将SVG文件转换为PNG格式图像,并通过所谓的“地铁”(metro)打包器将这些图像传递给React Native应用。使用该插件可以有效地将SVG文件作为React Native的Image组件的资源,方便地在应用中展示矢量图形。 当开发者希望使用SVG图像作为应用程序的启动图标时,react-native-svg-asset-plugin同样能够提供支持。开发者需要通过npm工具进行安装,并且在安装过程中,确保React Native的版本至少为0.57,因为该插件不支持更低版本。此外,该插件不适用于Expo框架,对于使用Expo的项目,开发者需要寻找其他解决方案。 安装react-native-svg-asset-plugin后,需要在项目的metro配置文件中进行设置。具体来说,就是需要在metro.config.js文件的transformer部分中添加'react-native-svg-asset-plugin'到assetPlugins数组中。这一配置更改是必要的,因为它告诉metro打包器如何处理SVG文件,确保它们在构建过程中被正确地转换和包含在最终的应用包中。 从概念上讲,SVG(可缩放矢量图形)是一种基于XML的图形格式,用于描述二维矢量图形。它与传统的光栅图像格式如JPEG或PNG不同,SVG图形可以无损放大或缩小而不失真,这使得SVG非常适合响应式设计和跨不同设备的适配。在移动应用开发领域,尤其是在React Native这样的跨平台框架中,使用SVG可以提供更大的灵活性和更小的文件尺寸,相比于传统图像格式,这可以进一步减小应用的体积和提高渲染性能。 React Native是一个由Facebook开发并维护的开源框架,用于构建可在iOS和Android上运行的原生移动应用。它允许开发者使用JavaScript和React编程语言来编写代码,生成本地平台组件。React Native的组件中包括Image组件,它通常用于加载和显示图像资源。但是,React Native本身对SVG的支持并不是开箱即用的,需要借助react-native-svg-asset-plugin之类的插件来实现。 值得一提的是,由于react-native-svg-asset-plugin依赖于metro打包器,所以理解metro打包器的工作原理和配置方法对于正确使用该插件至关重要。metro打包器是React Native项目的构建工具,它负责将应用程序代码打包成可以在目标设备上运行的格式。它在处理静态资源时,比如图片文件,有着自己特定的处理流程,这就是为什么需要在metro配置文件中明确添加插件以处理SVG的原因。 综上所述,react-native-svg-asset-plugin是一个在React Native项目中处理SVG图形文件的有效工具,它可以增强开发者的开发体验,减少在不同平台间维持一致性的复杂性。通过该插件,开发者能够方便地将SVG文件作为资源导入到React Native应用中,使得应用可以显示高质量、可缩放的矢量图形,同时保持应用性能和效率。"

相关推荐

filetype

/** Copyright © 2013-2021 DataYes, All Rights Reserved. */ /* eslint-disable */ const path = require('path'); const webpack = require('webpack'); const fs = require('fs'); const HtmlWebpackPlugin = require('html-webpack-plugin'); const ForkTSCheckerWebpackPlugin = require('fork-ts-checker-webpack-plugin'); const { TsConfigPathsPlugin } = require('awesome-typescript-loader'); const WebpackBar = require('webpackbar'); const CaseSensitive = require('case-sensitive-paths-webpack-plugin'); const withCI = require('@dyc/adam-apple-ci/with-ci'); const withModernBuildOrNot = require('./with-modern'); const FriendlyErrorsWebpackPlugin = require('friendly-errors-webpack-plugin'); const AntdDayjsWebpackPlugin = require('antd-dayjs-webpack-plugin'); const compose = (...args) => (result) => args.reduceRight((result, fn) => fn(result), result); const theme = require('./theme'); const withDll = (webpackConfig) => { const glob = require('globby'); const AddAssetHtmlPlugin = require('add-asset-html-webpack-plugin'); const manifestJson = path.join(process.cwd(), 'node_modules/vender-dll/manifest.json'); if (!fs.existsSync(manifestJson)) { throw new Error('没有找到 node_modules/vender-dll/manifest.json, 尝试npm run build:dll'); } const manifest = path.resolve(process.cwd(), './node_modules/vender-dll/*.dll.js'); webpackConfig.plugins.push( new webpack.DllReferencePlugin({ context: process.cwd(), manifest: require.resolve(path.join(process.cwd(), 'node_modules/vender-dll/manifest.json')), }) ); glob.sync(manifest).forEach((x, i) => { webpackConfig.plugins.push( new AddAssetHtmlPlugin({ filepath: x, includeSourcemap: false, }) ); }); return webpackConfig; }; const withDllOrNot = process.argv.includes('--no-dll') ? (i) => i : withDll; const withLazyBuild = (webpackConfig) => { const LazyCompilePlugin = require('lazy-compile-webpack-plugin'); webpackConfig.plugins.push(new LazyCompilePlugin()); return webpackConfig; }; const withLazyBuildOrNot = process.argv.includes('-l') ? withLazyBuild : (i) => i; module.exports = compose( withLazyBuildOrNot, withModernBuildOrNot({}), withDllOrNot, withCI )({ mode: 'development', devtool: 'eval-cheap-module-source-map', entry: path.join(process.cwd(), 'js/index'), output: { pathinfo: false, filename: 'static/js/[name].bundle.js', path: path.join(process.cwd(), 'build'), chunkFilename: 'static/js/[name].chunk.js', publicPath: '/', }, resolve: { symlinks: false, modules: ['node_modules', 'js', 'framework/src'], extensions: ['.js', '.ts', 'jsx', '.tsx'], plugins: [ new TsConfigPathsPlugin({ configFile: path.join(process.cwd(), 'tsconfig.json'), }), ], }, optimization: { minimize: false, }, plugins: [ new webpack.HotModuleReplacementPlugin(), new HtmlWebpackPlugin({ filename: 'index.html', template: path.join(process.cwd(), 'public/index.html'), // favicon: path.join(process.cwd(), 'public/favicon.png'), chunks: ['vendor', 'main'], inject: true, }), new webpack.DefinePlugin({ __DEVELOPMENT__: true, __DEVTOOLS__: true, }), // new webpack.ProvidePlugin({ // jquery: path.join(process.cwd(), 'js/utils/zepto/zepto.min'), // }), // new BundleAnalyzerPlugin(), new ForkTSCheckerWebpackPlugin({ async: true, typescript: { enabled: true, mode: 'write-references', // profile: true, }, }), new WebpackBar({ // profile: true, name: require(path.join(process.cwd(), 'package.json')).name || 'client', }), new CaseSensitive(), new FriendlyErrorsWebpackPlugin(), new AntdDayjsWebpackPlugin({ replaceMoment: true, plugins: [ 'isSameOrBefore', 'isSameOrAfter', 'advancedFormat', 'customParseFormat', 'weekday', 'weekYear', 'weekOfYear', 'isMoment', 'localeData', 'localizedFormat', 'badMutable', 'isoWeek', 'dayOfYear', 'duration', 'relativeTime', 'isBetween', 'minMax', ], }), ], module: { noParse: [/jszip.js$/], rules: [ { test: /\.(t|j)sx?$/, use: [ 'cache-loader', { loader: 'thread-loader', // loaders with equal options will share worker pools options: { // the number of spawned workers, defaults to (number of cpus - 1) or // fallback to 1 when require('os').cpus() is undefined workers: 2, // number of jobs a worker processes in parallel // defaults to 20 workerParallelJobs: 50, // additional node.js arguments workerNodeArgs: ['--max-old-space-size=1024'], // Allow to respawn a dead worker pool // respawning slows down the entire compilation // and should be set to false for development poolRespawn: false, // timeout for killing the worker processes when idle // defaults to 500 (ms) // can be set to Infinity for watching builds to keep workers alive poolTimeout: 2000, // number of jobs the poll distributes to the workers // defaults to 200 // decrease of less efficient but more fair distribution poolParallelJobs: 50, // name of the pool // can be used to create different pools with elsewise identical options name: 'js-thread-pool', }, }, { loader: 'babel-loader', options: { cacheDirectory: true, }, }, ], exclude: /node_modules/, include: [path.resolve('js'), path.resolve('framework'), path.resolve('packages')], }, { test: /\.css$/, use: ['style-loader', 'css-loader'], }, { test: /\.less$/, use: [ 'style-loader', 'css-loader', { loader: 'less-loader', options: { javascriptEnabled: true, modifyVars: theme, }, }, ], }, { test: /\.(jpeg|png|jpg|gif|pdf|mp3|ogg|wav)$/, use: ['file-loader?name=[path][name].[ext]'], }, { test: /\.woff(2)?(\?v=[0-9]\.[0-9]\.[0-9])?$/, use: ['url-loader?limit=10000&mimetype=application/font-woff'], }, { test: /\.(ttf|eot|svg)(\?v=[0-9]\.[0-9]\.[0-9])?$/, use: ['file-loader'], }, ], }, performance: { hints: false, }, devServer: { quiet: true, contentBase: process.cwd(), port: process.env.PORT || 3000, host: '0.0.0.0', hot: true, compress: true, stats: { colors: true, assets: false, modules: false, children: false, }, historyApiFallback: true, }, }); 把你刚才的改动放入文件中

婉君喜欢DIY
  • 粉丝: 25
上传资源 快速赚钱