React native 如何使用Expo和React Native的绝对路径导入?
我正在尝试使用绝对导入路径,而不是与和React Native的相对路径 我看了世博会的文件,找不到答案。。。我在react社区中搜索主题,但Expo似乎已经在使用它,因此我更改了我的React native 如何使用Expo和React Native的绝对路径导入?,react-native,expo,React Native,Expo,我正在尝试使用绝对导入路径,而不是与和React Native的相对路径 我看了世博会的文件,找不到答案。。。我在react社区中搜索主题,但Expo似乎已经在使用它,因此我更改了我的.babelrc,以创建一些别名: { "presets": ["babel-preset-expo"], "env": { "development": { "plugins": [
.babelrc
,以创建一些别名:
{
"presets": ["babel-preset-expo"],
"env": {
"development": {
"plugins": [
"transform-react-jsx-source",
["module-resolver", {
"root": ["./app"],
"alias": {
"Components": "./app/components",
}
}]
]
}
}
}
但我得到了以下错误:
Unable to resolve module '@expo/vector-icons/glyphmaps/Entypo.json'
from '/Users/eduardoleal/Code/lua/rook/node_modules/@expo/vector-icons/Entypo.js':
Module does not exist in the module map or in these directories: /Users/eduardoleal/Code/lua/rook/node_modules/@expo/vector-icons/node_modules/@expo/vector-icons/glyphmaps , /Users/eduardoleal/Code/lua/rook/node_modules/@expo/vector-icons/glyphmaps This might be related to https://github.com/facebook/react-native/issues/4968 To resolve try the following:
1. Clear watchman watches: 'watchman watch-del-all'.
2. Delete the 'node_modules' folder: 'rm -rf node_modules && npm install'.
3. Reset packager cache: 'rm -fr $TMPDIR/react-*' or 'npm start --reset-cache'.
ABI16_0_0RCTFatal -[ABI16_0_0RCTBatchedBridge stopLoadingWithError:] __34-[ABI16_0_0RCTBatchedBridge start]_block_invoke_2 _dispatch_call_block_and_release _dispatch_client_callout _dispatch_main_queue_callback_4CF __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ __CFRunLoopRun CFRunLoopRunSpecific GSEventRunModal UIApplicationMain main start 0x0
有什么简单的方法可以导入绝对路径吗?经过一段时间的尝试,这项工作可以正常进行。我可以用de following
解决问题。babelrc
:
{
"presets": ["babel-preset-react-native-stage-0/decorator-support"],
"env": {
"development": {
"plugins": ["transform-react-jsx-source"]
}
},
"plugins": [
["module-resolver", {
"alias": {
"react-native-vector-icons": "@expo/vector-icons",
"@expo/vector-icons/lib/create-icon-set": "react-native-vector-icons/lib/create-icon-set",
"@expo/vector-icons/lib/icon-button": "react-native-vector-icons/lib/icon-button",
"@expo/vector-icons/lib/create-icon-set-from-fontello": "react-native-vector-icons/lib/create-icon-set-from-fontello",
"@expo/vector-icons/lib/create-icon-set-from-icomoon": "react-native-vector-icons/lib/create-icon-set-from-icomoon",
"@expo/vector-icons/lib/icon-button": "react-native-vector-icons/lib/icon-button",
"@expo/vector-icons/glyphmaps": "react-native-vector-icons/glyphmaps",
"$components": "./app/components",
"$config": "./app/config",
"$helpers": "./app/helpers",
"$navigators": "./app/navigators",
"$reducers": "./app/reducers",
"$screens": "./app/screens",
"$images": "./assets/images",
"$fonts": "./assets/fonts",
"$icons": "./assets/icons",
"$videos": "./assets/videos",
}
}]
]
}
我将巴别塔预设博览会的内容复制到我的.babelrc
。这不是最好的解决方案。。。但它工作正常
关于它的更多细节只需简单即可。babelrc简单如下:
{
"presets": ["babel-preset-expo"],
"env": {
"development": {
"plugins": ["transform-react-jsx-source"]
}
}
}
import Entypo from '@expo/vector-icons/Entypo';
然后像这样导入:
{
"presets": ["babel-preset-expo"],
"env": {
"development": {
"plugins": ["transform-react-jsx-source"]
}
}
}
import Entypo from '@expo/vector-icons/Entypo';
更新:Expo v32.0.0及更高版本
Expo init正在为您创建一个babel.config.js
。只需将plugins
键添加到您的babel.config.js
文件并添加您的别名。不再需要env
键
module.exports=函数(api){
api.cache(true)
返回{
预设:['babel-preset-expo'],
插件:[
[
“模块解析器”,
{
别名:{
资产:'./资产',
组件:“./src/components”,
模块:'./src/modules',
库:'./src/lib',,
类型:'./src/types',
常量:'./src/constants',
},
},
],
],
}
}
更新:Expo.io SDK v20.0.0的更改
由于SDK v20.0.0,您可以使用正常的巴别塔博览会预设
{
"presets": ["babel-preset-expo"],
"env": {
"development": {
"plugins": ["transform-react-jsx-source"]
}
},
"plugins": [
["module-resolver", {
"alias": {
"alias-name": "./app",
}
}]
]
}
Expo.io SDK v19.0.0及之前版本
没有root
-元素,分离插件
并将预设更改为babel-preset-react-native-stage-0/decorator支持
,别名对我来说很有用
在16.0.0版上使用Expo.io
在以下世博论坛中找到:
你能证实这对你的案子也有效吗
{
"presets": ["babel-preset-react-native-stage-0/decorator-support"],
"env": {
"development": {
"plugins": ["transform-react-jsx-source"]
}
},
"plugins": [
["module-resolver", {
"alias": {
"alias-name": "./app",
}
}]
]
}
适用于最新的expo用户(sdk版本>=32)
只需在您的babel.config.js中添加插件属性(在项目根目录中查找此文件)
package.json
{
"name": "~" // whatever u want
}
然后
import{Foo}来自“~/Foo”;
从“~/Bar”导入{Bar};
// ...
为什么要使用绝对路径?除了您的计算机之外,该代码在任何其他计算机上都不起作用。我更喜欢从“@components/A”导入之类的东西,而不是从“../../../A”导入之类的东西。也许“导入绝对路径”不是我的意思…@VojtechNovak它是项目根文件夹的绝对路径,不是根硬盘驱动器我想为自己的组件创建别名。。。所以这不是我需要的,它在生产中也起作用吗?它说环境就是发展它在世博会项目中非常有用,谢谢!在进行这些更改之后,您可能还需要运行expo r-c(这相当于expo的warn start--reset cache
)以使其生效。