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babel-plugin-react-native-style-rewrite

v1.0.0

Published

rewrite react-native style plain Object to StyleSheet object

Downloads

2

Readme

这个插件出现的原因:

  • 使用StyleSheet可以提高性能: 因为StyleSheet.create()创建的样式可以通过ID重复引用,而内联样式则每次都需要创建一个新的对象。 因为StyleSheet允许仅通过bridge发送一次样式。 所有后续使用都将引用一个ID(尚未实现)。
  • 直接写一个js对象作为样式更方便直观一点
  • 经过babel处理后自动将js对象形式的样式转换为StyleSheet.create()后的样式

使用方法

  1. 安装 yarn add babel-plugin-react-native-style-rewritenpm install babel-plugin-react-native-style-rewrite
  2. 使用 找到babel的config文件,加入此插件配置
       module.exports = {
         presets: ['module:metro-react-native-babel-preset'],
         plugins: [['import', {libraryName: '@ant-design/react-native'}]],
         env: {
           production: {
             plugins: ['react-native-paper/babel'],
           },
           development: {
             plugins: ['babel-plugin-react-native-style-rewrite'],
           },
         },
       };
    

这个插件的效果

转换前:

  const AppAll = () => {
  const [dialogShow, setDialogShow] = useState(false);
  const [loading, setLoading] = useState(true);
  return (
    <Provider store={store}>
      {loading ? (
        <>
          <Image
            style={{
              width: DEVICE_WIDTH,
              height: DEVICE_REAL_HEIGHT,
            }}
            resizeMode="stretch"
            source={require('./launch_screen.png')}
          />
          <PrivacyDialog
            dialogShow={dialogShow}
            onAgreePress={() => {
              setDialogShow(false);
              setLoading(false);
            }}
          />
        </>
      ) : (
        <App />
      )}
    </Provider>
  );
};

AppRegistry.registerComponent(appName, () => AppAll);

转换后:

  const AppAll = () => {
  // 隐私政策弹窗是否显示
  const [dialogShow, setDialogShow] = useState(false); // 第一次打开app的加载状态

  const [loading, setLoading] = useState(true);
  return <Provider store={store}>
      {loading ? <>
          <Image style={styless514055.s367479} resizeMode="stretch" source={require('./launch_screen.png')} />
          <PrivacyDialog dialogShow={dialogShow} onAgreePress={() => {
        setDialogShow(false);
        setLoading(false);
      }} />
        </> : <App />}
    </Provider>;
};

AppRegistry.registerComponent(appName, () => AppAll);
var styless514055 = StyleSheet.create({
  s367479: {
    width: DEVICE_WIDTH,
    height: DEVICE_REAL_HEIGHT
  }
});