React native (已解决)TypeError:undefined不是对象(正在计算';y.Font.isLoaded';)
我正在学习handlebarlabs的货币转换器应用程序课程。我正试图通过从@expo/vector icons导入Ionicons,将图标添加到我的ScrollView列表项中 谁能告诉我我做错了什么 以下是我根据课程笔记编写的代码:React native (已解决)TypeError:undefined不是对象(正在计算';y.Font.isLoaded';),react-native,expo,mobile-application,React Native,Expo,Mobile Application,我正在学习handlebarlabs的货币转换器应用程序课程。我正试图通过从@expo/vector icons导入Ionicons,将图标添加到我的ScrollView列表项中 谁能告诉我我做错了什么 以下是我根据课程笔记编写的代码: import React, { Component } from 'react'; import { ScrollView, StatusBar, Platform } from 'react-native'; import { Ionicons } from
import React, { Component } from 'react';
import { ScrollView, StatusBar, Platform } from 'react-native';
import { Ionicons } from '@expo/vector-icons';
import { ListItem, Separator } from '../components/List';
const ICON_PREFIX = Platform.OS === 'ios' ? 'ios' : 'md';
const ICON_COLOR = '#868686';
const ICON_SIZE = 23;
class Options extends Component {
handleThemesPress = () => {
console.log('Press Themes');
}
handleSitePress = () => {
console.log('Site Press');
}
render() {
return (
<ScrollView>
<StatusBar translucent={false} barStyle={"default"} />
<ListItem
text="Themes"
onPress={this.handleThemesPress}
customIcon={
<Ionicons name={`${ICON_PREFIX}-arrow-forward`} size={ICON_SIZE} color={ICON_COLOR} />
}
/>
<Separator/>
<ListItem
text="Fixer.io"
onPress={this.handleSitePress}
customIcon={
<Ionicons name={`${ICON_PREFIX}-link`} size={ICON_SIZE} color={ICON_COLOR} />
}
/>
<Separator/>
</ScrollView>
);
}
}
export default Options;
更新:
按照@Oleg的回答,我已经在SDK 35.0.0上了,但之前的更新似乎没有正确完成。重新安装最新的SDK解决了这个问题。谢谢大家! 我使用Ionic示例通过重用您发布的代码创建了零食。 请检查项目中package.json和expo sdk中的版本。
如果您的Expo SDK已过时,请尝试将其更新为最新版本。查看此链接以更新:希望此帮助已在SDK 35上,但重新安装SDK解决了此问题。非常感谢。
TypeError: undefined is not an object (evaluating 'y.Font.isLoaded')
This error is located at:
in p
in RCTView
in RCTView
in TouchableHighlight
in f
in RCTScrollContentView
in RCTScrollView
in u
in l
in Unknown
in v
in RCTView
in RCTView
in c