在 React Native 中访问主题颜色

Question

我正在尝试访问主题的原色。我在执行此操作时遇到问题，因为错误显示“无法读取未定义的属性颜色”

请检查我下面的代码。

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

您可以创建一个名为 useStyles 的函数，然后通过参数传递主题对象。

例子：

import React, { memo } from "react";
import { StyleSheet, Text } from "react-native";
import { useTheme } from 'react-native-paper'; //or styled-components theme object 

const Header = ({ children }) => {

  const theme = useTheme();
  const styles = useStyles(theme);

  return <Text style={styles.header}>{children}</Text>;
}



const useStyles = theme => (StyleSheet.create(({
  container: {
    ...
  },
  header: {
    fontSize: 26,
    color: theme.colors.primary,
  },
  something: {
    ...
    backgroudColor: theme.colors.background,
  },
  other: {
    ...
    color: theme.colors.primary,
  },
)))


export default memo(Header);