我正在使用本机 API 将数据显示到FlatList中,不幸的是出现以下错误:
错误:元素类型无效:应为字符串。
到目前为止,我已经完成了以下工作:
import React, { Component } from "react";
import { View, Text, FlatList,List } from "react-native";
// import {Row} from './Row';
export default class FlatListDemo extends Component {
constructor(props) {
super(props);
this.state = {
loading: false,
data: [],
page: 1,
seed: 1,
error: null,
refreshing: false,
};
}
componentDidMount() {
this.makeRemoteRequest();
}
makeRemoteRequest = () => {
const { page, seed } = this.state;
const url = `https://randomuser.me/api/?seed=${seed}&page=${page}&results=20`;
this.setState({ loading: true });
fetch(url)
.then(res => res.json())
.then(res => {
this.setState({
data: page === 1 ? res.results : [...this.state.data, ...res.results],
error: res.error || null,
loading: false,
refreshing: false
});
})
.catch(error => {
this.setState({ error, loading: false });
});
};
render() {
return (
<View style={{ flex: 1, alignItems: "center", justifyContent: "center" }}>
<List>
<FlatList
data={this.state.data}
renderItem={({ item }) => (
<ListItem
roundAvatar
title={`${item.name.first} ${item.name.last}`}
subtitle={item.email}
avatar={{ uri: item.picture.thumbnail }}
/>
)}
keyExtractor={item => item.email}
/>
</List>
</View>
);
}
}
所以,我从过去两个小时开始尝试解决,但堆积在那里。可能是什么问题?