图标未显示在反应导航标题按钮中（React Native）

Question

我正在尝试使用react-navigation-header-buttons 库向 headerRight 添加一个图标。但显示的是图标的标题而不是图标。

这是应该显示图标的代码。

import React, { useState, useLayoutEffect } from 'react';
import { View, Text, Button, StyleSheet } from 'react-native'

import { MEALS } from '../data/DummyData';
import { HeaderButtons, Item } from 'react-navigation-header-buttons';
import { HeaderButton } from '../components/CustomHeaderButton';

const MealDetailScreen = props => {
    const mealId = props.route.params.mealId;
    const selectedMeal = MEALS.find(meal => meal.id == mealId);
    const [headerTitle, setHeaderTitle] = useState();

    useLayoutEffect(() => {
        setHeaderTitle(() => selectedMeal === undefined ? props.route.params.title : selectedMeal.title)
        props.navigation.setOptions({
            headerTitle: headerTitle,
            headerRight: () => (
                <HeaderButtons HeaderButtonComponent={HeaderButton}>
                    <Item
                        title="Favourite"
                        iconName="ios-star"
                        onPress={() => {
                            console.log('Mark as favorite!');
                        }}
                    />
                </HeaderButtons>
            )
        });
    }, [props.navigation, headerTitle]);


    return (
        <View>
            <Text>The Meal Detail Screen!</Text>
            <Text>{selectedMeal.title}</Text>
            <Button title="Go Back to Categories!" onPress={() => {
                props.navigation.popToTop();
            }} />
        </View>
    )
}

const styles = StyleSheet.create({
});

export default MealDetailScreen;

这是标题按钮的自定义组件。

import React from 'react';
import { Platform } from 'react-native';
import { HeaderButton } from 'react-navigation-header-buttons';
import { Ionicons } from '@expo/vector-icons';

import Colors from '../constants/Colors';

const CustomHeaderButton = props => {
    return (
        <HeaderButton
            {...props}
            IconComponent={Ionicons}
            iconSize={23}
            color={Platform.OS === 'android' ? 'white' : Colors.primaryColor}
        />);
}

export default CustomHeaderButton;

只有标题显示在 headerRight 中。

<Item
  title="Favourite"
  iconName="ios-star"
  onPress={() => {
  console.log('Mark as favorite!');
  }}
/>

React Native 版本：5 React-navigation-header-buttons 版本：3.0.5

Answer 1

问题出在您的组件导入语句中。

代替

import { HeaderButton } from '../components/CustomHeaderButton';

类型

import HeaderButton from '../components/CustomHeaderButton';