React Native中的網絡請求fetch和簡單封裝

React Native中的網絡請求fetch使用方法最爲簡單，但卻能夠實現大多數的網絡請求，須要瞭解更多的能夠訪問：

http://www.javashuo.com/article/p-cqggfgkp-ec.html

/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * 周少停 2016-09-28
 * fetch請求數據 header 參數 response轉json 請求方式
 */


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

var Project = React.createClass({
    render() {
        return (
            <View style={styles.container}>
                <TouchableOpacity onPress={this.ssss}>
                    <Text>訪問</Text>
                </TouchableOpacity>
            </View>
        );
    },
    ssss(){
        fetch('http://www.pintasty.cn/home/homedynamic', {
            method: 'POST',
            headers: { //header
                'token': 'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VySWQiOiJVLTliZGJhNjBjMjZiMDQwZGJiMTMwYWRhYWVlN2FkYTg2IiwiZXhwaXJhdGlvblRpbWUiOjE0NzUxMTg4ODU4NTd9.ImbjXRFYDNYFPtK2_Q2jffb2rc5DhTZSZopHG_DAuNU'
            },
            body: JSON.stringify({ //參數
                'start': '0',
                'limit': '20',
                'isNeedCategory': true,
                'lastRefreshTime': '2016-09-25 09:45:12'
            })
        })
            .then((response) => response.json()) //把response轉爲json
            .then((responseData) => { // 上面的轉好的json
                    alert(responseData); /
                // console.log(responseData);
            })
            .catch((error)=> {
                alert('錯誤了');
            })
    }
});

const styles = StyleSheet.create({
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: '#F5FCFF'
    }
});

AppRegistry.registerComponent('Project', () => Project);

fetch是人家已經封裝好,再度封裝只是基於本身項目進行的封裝,這裏只是基於公司項目實現一下,講解一下回調:

封裝實現:

/**
 * NetUitl 網絡請求的實現
 * https://github.com/facebook/react-native
 */
import React, { Component } from 'react';
import {
    AppRegistry,
    StyleSheet,
    Text,
    View,
    ListView,
    Image,
    TouchableOpacity,
    Platform,
    AsyncStorage
} from 'react-native';

class NetUitl extends React.Component{
    /*
     *  get請求
     *  url:請求地址
     *  data:參數
     *  callback:回調函數
     * */
    static get(url,params,callback){
        if (params) {
            let paramsArray = [];
            //拼接參數
            Object.keys(params).forEach(key => paramsArray.push(key + '=' + params[key]))
            if (url.search(/\?/) === -1) {
                url += '?' + paramsArray.join('&')
            } else {
                url += '&' + paramsArray.join('&')
            }
        }
        //fetch請求
        fetch(url,{
            method: 'GET',
        })
            .then((response) => {
                callback(response)
            }).done();
    }
    /*
     *  post請求
     *  url:請求地址
     *  data:參數
     *  callback:回調函數
     * */
    static post(url,params,headers,callback){
        //fetch請求
        fetch(url,{
            method: 'POST',
            headers:{
                'token': headers
            },
            body:JSON.stringify(params)
        })
            .then((response) => response.json())
            .then((responseJSON) => {
                callback(responseJSON)
            }) .done();
    }



}

module.exports = NetUitl;

調用:

rightAction(){
    let params = {'start':'0',limit:'20','isNeedCategory': true, 'lastRefreshTime': '2016-09-25 09:45:12'};
    NetUitl.post('http://www.pintasty.cn/home/homedynamic',params,'eyJ0eXAiOiJKV1QiLCJhbGciOiJIUzI1NiJ9.eyJ1c2VySWQiOiJVLTliZGJhNjBjMjZiMDQwZGJiMTMwYWRhYWVlN2FkYTg2IiwiZXhwaXJhdGlvblRpbWUiOjE0NzUxMTg4ODU4NTd9.ImbjXRFYDNYFPtK2_Q2jffb2rc5DhTZSZopHG_DAuNU',function (set) {
        //下面的就是請求來的數據
        console.log(set)
    })
    //get請求,以百度爲例,沒有參數,沒有header
    NetUitl.get('https://www.baidu.com/','',function (set) {
        //下面是請求下來的數據
        console.log(set)
    })

}

　　

另:由於iOS9對https的調整,須要在項目的info.plist添加Key：NSAllowsArbitraryLoads,具體方法看http://www.cnblogs.com/shaoting/p/5148323.html

完整源碼下載：https://github.com/pheromone/React-Native-1