问题描述

我正在尝试直接从样式中访问 useTheme()但到目前为止，我的解决方案似乎不起作用.我不会出错.有没有办法做我想做的事?

I'm trying to access useTheme() directly from the styles But so far my solution doesn't seem to work. I'm not getting in error back. Is there a way to do what I'm trying to do?

 import { StyleSheet } from "react-native";

    import { useTheme } from '@react-navigation/native'
    
    export default function () {
            const { colors } = useTheme();
            const styles = GlobalStyles({ colors: colors })
            return styles
        }
        
        const GlobalStyles = (props) => StyleSheet.create({
        
            container: {
                flex: 1,
                backgroundColor: props.colors.backgroundColor,
        
            },
        })

在组件中访问样式

 import React from "react";
import GlobalStyles from "../globalStyles.js"
    
    class Inventory extends React.Component {
    
    render() {
    
            return (
                <View style={globalStyles.container}>
            )
    
     }

推荐答案

你有几个问题:你只能在钩子或函数组件中使用钩子.所以你可以将你的全局样式表转换成一个钩子:

You have a couple of issues: you can only use a hook within a hook or a function component. So you could convert your global stylesheet into a hook:

import { StyleSheet } from "react-native";
import { useTheme } from '@react-navigation/native'
    
const getGlobalStyles = (props) => StyleSheet.create({
  container: {
    flex: 1,
    backgroundColor: props.colors.backgroundColor,
  },
});

function useGlobalStyles() {
  const { colors } = useTheme();

  // We only want to recompute the stylesheet on changes in color.
  const styles = React.useMemo(() => getGlobalStyles({ colors }), [colors]);

  return styles;
}

export default useGlobalStyles;

然后，您可以通过将 Inventory 类组件转换为函数组件并使用新的 useGlobalStyles 挂钩来使用该挂钩.

Then you can use the hook by converting your Inventory class component into a function component and using the new useGlobalStyles hook.

import React from "react";
import useGlobalStyles from "../globalStyles.js"
    
const Inventory = () => {
  const globalStyles = useGlobalStyles();

  return (
    <View style={globalStyles.container}>
  )
}

这篇关于反应原生导航 useTheme()的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持跟版网！