在 React-Native 中执行时获取 API 调用不起作用

Fetch API call not working when executed in React-Native

我正在尝试在 React Native 中进行提取 API 调用:

import React, { Component } from 'react';
import {
    AppRegistry,
    StyleSheet,
    Text,
    TextInput,
    TouchableHighlight,
    View
} from 'react-native';

class AwesomeProject extends Component {
    render() {
        return (    
            <View style={{flex: 1, flexDirection: 'column', justifyContent: 'center', alignItems: 'center'}}>
            <TextInput 
                placeholder="Enter Text to Be Validated"
                style={{height: 65, width: 275, fontSize: 22}} 
                onSubmitEditing={(event) => {
                    var apiKey = "someAPIKey"
                    var encodedAddress = encodeURIComponent(event.nativeEvent.text)
                    fetch("https://maps.googleapis.com/maps/api/geocode/json?address=" + encodedAddress + "&key=" + apiKey)
                        .then(response => response.json())
                        .then(json => {
                            if (json.status === "OK") {
                                console.log(json.results.formatted_address)
                            }
                            else {
                                console.log("Invalid")
                            }
                    })
                        .catch(err => console.err(err))
                }}
               />   
          </View>
    );
}

但是,注册到 onSubmitEditing 的回调仅在 React-Native 外部测试时有效。有人知道解释吗??

谢谢!!

尝试

if (json.status === "OK") { console.log(json.results[0].formatted_address) }

我进行了一些挖掘,发现返回的 JSON 具有状态 属性 和一个结果数组。您可以使用 results[0].

访问该结果数组中的第一项