首先，大家可以看下flutter的一些微信库

fluwx: ^2.0.8+3

运行一下，flutter pub get

首先在iOS项目下配置一些设置：

1、在info.plist中加入如下配置

<key>CFBundleURLTypes</key>

<array>

<dict>

<key>CFBundleTypeRole</key>

<string>Editor</string>

<key>CFBundleURLName</key>

<string>weixin</string>

<key>CFBundleURLSchemes</key>

<array>

<string>Your App ID</string>

</array>

</dict>

</array>

<key>CFBundleVersion</key>

2、在Flutter项目下可以创建一个WeChatPayHelper的类，用来管理微信支付

class WeChatPayHelper{

  //微信支付

  static void wechatPay(TaoXiOrderWeChatPayModel taoXiOrderWeChatPayModel) {

    fluwx.payWithWeChat(

      appId: taoXiOrderWeChatPayModel.result.appId,

      partnerId: taoXiOrderWeChatPayModel.result.partnerId,

      prepayId: taoXiOrderWeChatPayModel.result.prepayId,

      packageValue: taoXiOrderWeChatPayModel.result.pPackage,

      nonceStr: taoXiOrderWeChatPayModel.result.nonceString,

      timeStamp: int.parse(taoXiOrderWeChatPayModel.result.timeStamp),

      sign: taoXiOrderWeChatPayModel.result.sign).then((value) {

        print("微信支付唤醒${value}");

      });

  }

}

其中，套系支付的TaoXiOrderWeChatPayModel类，可以直接拿走用

class TaoXiOrderWeChatPayModel {

  Result result;

  TaoXiOrderWeChatPayModel({this.result});

  TaoXiOrderWeChatPayModel.fromJson(Map<String, dynamic> json) {

    result =

        json['Result'] != null ? new Result.fromJson(json['Result']) : null;

  }

  Map<String, dynamic> toJson() {

    final Map<String, dynamic> data = new Map<String, dynamic>();

    if (this.result != null) {

      data['Result'] = this.result.toJson();

    }

    return data;

  }

}

class Result {

  String appId;

  String nonceString;

  String pPackage;

  String partnerId;

  String prepayId;

  String sign;

  String timeStamp;

  Result(

      {this.appId,

      this.nonceString,

      this.pPackage,

      this.partnerId,

      this.prepayId,

      this.sign,

      this.timeStamp});

  Result.fromJson(Map<String, dynamic> json) {

    appId = json['AppId'];

    nonceString = json['NonceString'];

    pPackage = json['Package'];

    partnerId = json['PartnerId'];

    prepayId = json['PrepayId'];

    sign = json['Sign'];

    timeStamp = json['TimeStamp'];

  }

  Map<String, dynamic> toJson() {

    final Map<String, dynamic> data = new Map<String, dynamic>();

    data['AppId'] = this.appId;

    data['NonceString'] = this.nonceString;

    data['Package'] = this.pPackage;

    data['PartnerId'] = this.partnerId;

    data['PrepayId'] = this.prepayId;

    data['Sign'] = this.sign;

    data['TimeStamp'] = this.timeStamp;

    return data;

  }

}

3、一些问题

//监听，但是可能不管用（gitHub问题地址）

fluwx.weChatResponseEventHandler.listen((res) {

      ///回掉不过来，fluwx建议我们向后台要结果

      if (res is fluwx.WeChatPaymentResponse) {

        print(res);

      }

    });

在开发中，可能小伙伴根本找不到fluwx，这个类名在哪里，其实他是导入头文件时，重命名了而已

原：import 'package:fluwx/fluwx.dart';

重命名：import 'package:fluwx/fluwx.dart' as fluwx;