Flutter 微信支付实现流程 、微信支付后 台 PHP 代码分析、以及在 Ios 中实现微信 支付

 

Flutter 微信支付流程

1. 官方流程图

https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8_3

2. 简单流程:

1. 调用后台 api 接口生成签名字段
2. 调用支付插件传入签名字段完成支付
3. 支付完成以后处理回调

Ios 中实现微信支付 sy_flutter_wechat

代码实现

import 'dart:convert';
import 'package:flutter/material.dart';
import 'package:sy_flutter_wechat/sy_flutter_wechat.dart';
import 'package:dio/dio.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // 主题配置
        primarySwatch: Colors.blue,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  HomePage({Key key}) : super(key: key);
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  @override
  void initState() {
    super.initState();
    _register();
  }

  _register() async {
    bool result = await SyFlutterWechat.register('wx5881fa2638a2ca60');
    print(result);
  }

   _weixinPay() async{
    var apiUrl='http://agent.itying.com/wxpay/';
    var myPayInfo =await Dio().get(apiUrl);
    Map myInfo =json.decode(myPayInfo.data); print(myInfo);
    var payInfo={ "appid":myInfo["appid"].toString(),"partnerid":myInfo["partnerid"].toString(), "prepayid":myInfo["prepayid"].toString(), "package":myInfo["package"].toString(), "noncestr":myInfo["noncestr"].toString(), "timestamp":myInfo["timestamp"].toString(), "sign":myInfo["sign"].toString(),
    };
    SyPayResult payResult = await SyFlutterWechat.pay(
        SyPayInfo.fromJson(payInfo)); print(payResult);
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("微信"), ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[
          RaisedButton(
            child: Text('分享文字'), onPressed: () async {
            bool res = await SyFlutterWechat.shareText('hello
                shareType: SyShareType.session); print('分享文字:' + res.toString());
          }, ),
          RaisedButton(
            child: Text('分享图片'), onPressed: () async {
            bool res = await SyFlutterWechat.shareImage(
                'https://avatars0.githubusercontent.com/u/10024776', shareType: SyShareType.timeline); print('分享图片:' + res.toString());
          }, ),
          world',


          RaisedButton(
            child: Text('分享网页'), onPressed: () async {
            bool res = await SyFlutterWechat.shareWebPage( '标题',
                '描述',
                'https://avatars0.githubusercontent.com/u/10024776', 'http://www.example.com',
                shareType: SyShareType.session); print('分享网页:' + res.toString());
          }, ),
          RaisedButton(
            child: Text('支付'), onPressed: _weixinPay,
          ), ],
        ), ),
    ); }
}