Question

我正在尝试访问主题的原色。我遇到了问题，因为错误提示“无法读取未定义的属性颜色”

请在下面检查我的代码。

import React, { memo } from "react";
import { StyleSheet, Text, withTheme } from "react-native";

const Header = ({ children }) => <Text style={styles.header}>{children}</Text>;

const styles = StyleSheet.create({
  header: {
    fontSize: 26,
    color: withTheme.colors.primary,
  },
});

export default memo(Header);

Answer 1

您从react-native导入withTheme，应从react-native-paper导入

import {withTheme} from "react-native-paper"

Answer 2

您可以在react-native-paper中使用它

import React, { memo } from "react";
import { StyleSheet, Text } from "react-native";
import { DefaultTheme } from 'react-native-paper';

const theme =  ({
    ...DefaultTheme,
    colors: {
        ...DefaultTheme.colors,
    }
});
const Header = ({ children }) => <Text style={styles.header}>{children}</Text>;

const styles = StyleSheet.create({
  header: {
    fontSize: 26,
    color: theme.colors.primary,
  },
});

export default memo(Header);

如果您已经定义了主题，并且想要将其导入此处，则可以将主题HOC如下使用

import React, { memo } from "react";
import { StyleSheet, Text } from "react-native";
import { withTheme } from 'react-native-paper';

const Header = ({ theme, children }) => {
    const styles = StyleSheet.create({
        header: {
            fontSize: 26,
            color: theme.colors.primary,
        },
    });
    return (
        <Text style={styles.header}>{children}</Text>
    )
}

export default memo(withTheme(Header));

在React Native中访问主题颜色

2 个答案: