iOS应用之微信支付集成－直接前端集成

//微信支付商户号
 #define MCH_ID  @"YOUR_MCH_ID"
//开户邮件中的（公众账号APPID或者应用APPID）
#define WX_AppID @"YOUR_WX_AppID"
//安全校验码（MD5）密钥，商户平台登录账户和密码登录http://pay.weixin.qq.com 平台设置的“API密钥”，为了安全，请设置为以数字和字母组成的32字符串。
#define WX_PartnerKey @"YOUR_WX_PartnerKey"
//获取用户openid，可使用APPID对应的公众平台登录http://mp.weixin.qq.com 的开发者中心获取AppSecret。
#define WX_AppSecret @"YOUR_WX_AppSecret"

#pragma mark - 设置第三方 注册信息
- (void)registerMethods {
/****************       友盟分享注册信息     *****************/
  [UMSocialData setAppKey:UMSocial_AppKey];

  //设置微信AppId、appSecret，分享url
  [UMSocialWechatHandler setWXAppId:WX_appID appSecret:WX_AppSecret url:@"http://www.umeng.com/social"];

  //设置手机QQ 的AppId，Appkey，和分享URL
  [UMSocialQQHandler setQQWithAppId:QQ_AppID appKey:QQ_AppKey url:@"http://www.umeng.com/social"];
  [UMSocialConfig hiddenNotInstallPlatforms:@[UMShareToQQ, UMShareToQzone, UMShareToWechatTimeline, UMShareToWechatTimeline]];

  //打开新浪微博的SSO开关，设置新浪微博回调地址，这里必须要和你在新浪微博后台设置的回调地址一致。
  // 添加SSO授权开关（使用微博原生SDK）
  [UMSocialSinaSSOHandler openNewSinaSSOWithAppKey:Sina_AppKey RedirectURL:@"http://sns.whalecloud.com/sina2/callback"];
  // 添加SSO授权开关(非微博原生SDK)
  [UMSocialSinaHandler openSSOWithRedirectURL:@"http://sns.whalecloud.com/sina2/callback"];
/****************       友盟分享注册信息     *****************/

  //　先调用友盟，然后调用微信清册信息
/****************       注册微信支付信息    *****************/
  [WXApi registerApp:WX_appID];
  // [WXApi registerApp:WX_appID withDescription:@"demo 2.0"];
  两个任选一行，还不清楚这个appdesc有何作用
}

#pragma mark - 微信支付相关方法
- (void)weixinChooseAct {
  NSString *appid,*mch_id,*nonce_str,*sign,*body,*out_trade_no,*total_fee,*spbill_create_ip,*notify_url,*trade_type,*partner;
  //应用APPID
  appid = WX_appID;
  //微信支付商户号
  mch_id = MCH_ID;
  //产生随机字符串，这里最好使用和安卓端一致的生成逻辑
  nonce_str =[self generateTradeNO];
  body =@"微信支付时候看到的支付信息";
  //随机产生订单号用于测试，正式使用请换成你从自己服务器获取的订单号
  out_trade_no = self.gold_sn;
  //交易价格1表示0.01元，10表示0.1元
  total_fee = self.payCount;
  //获取本机IP地址，请再wifi环境下测试，否则获取的ip地址为error，正确格式应该是8.8.8.8
  spbill_create_ip =[getIPhoneIP getIPAddress];
  //交易结果通知网站此处用于测试，随意填写，正式使用时填写正确网站
  notify_url =@"www.cccuu.com";
  trade_type =@"APP";
  //商户密钥
  partner = WX_partnerKey;
  //获取sign签名
  DataMD5 *data = [[DataMD5 alloc] initWithAppid:appid mch_id:mch_id nonce_str:nonce_str partner_id:partner body:body out_trade_no:out_trade_no total_fee:total_fee spbill_create_ip:spbill_create_ip notify_url:notify_url trade_type:trade_type];
  sign = [data getSignForMD5];
  //设置参数并转化成xml格式
  NSMutableDictionary *dic = [NSMutableDictionary dictionary];
  [dic setValue:appid forKey:@"appid"];//公众账号ID
  [dic setValue:mch_id forKey:@"mch_id"];//商户号
  [dic setValue:nonce_str forKey:@"nonce_str"];//随机字符串
  [dic setValue:sign forKey:@"sign"];//签名
  [dic setValue:body forKey:@"body"];//商品描述
  [dic setValue:out_trade_no forKey:@"out_trade_no"];//订单号
  [dic setValue:total_fee forKey:@"total_fee"];//金额
  [dic setValue:spbill_create_ip forKey:@"spbill_create_ip"];//终端IP
  [dic setValue:notify_url forKey:@"notify_url"];//通知地址
  [dic setValue:trade_type forKey:@"trade_type"];//交易类型
  // 转换成xml字符串
  NSString *string = [dic XMLString];
  [self http:string];
}

#pragma mark - 拿到转换好的xml发送请求
- (void)http:(NSString *)xml {
  [MBProgressHUD showMessage:@"正在获取支付订单..."];
  AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
  //这里传入的xml字符串只是形似xml，但是不是正确是xml格式，需要使用af方法进行转义
  manager.responseSerializer = [[AFHTTPResponseSerializer alloc] init];
  [manager.requestSerializer setValue:@"text/xml; charset=utf-8" forHTTPHeaderField:@"Content-Type"];
  [manager.requestSerializer setValue:@"https://api.mch.weixin.qq.com/pay/unifiedorder" forHTTPHeaderField:@"SOAPAction"];
  [manager.requestSerializer setQueryStringSerializationWithBlock:^NSString *(NSURLRequest *request, NSDictionary *parameters, NSError *__autoreleasing *error) {
        return xml;
  }];
  //发起请求
  [manager POST:@"https://api.mch.weixin.qq.com/pay/unifiedorder" parameters:xml success:^(AFHTTPRequestOperation *operation, id responseObject) {
      NSString *responseString = [[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding] ;
      // LXLog(@"responseString is %@",responseString);
      //将微信返回的xml数据解析转义成字典
      NSDictionary *dic = [NSDictionary dictionaryWithXMLString:responseString];
      //判断返回的许可
      if ([[dic objectForKey:@"result_code"] isEqualToString:@"SUCCESS"] &&[[dic objectForKey:@"return_code"] isEqualToString:@"SUCCESS"] ) {
          //发起微信支付，设置参数
          PayReq *request = [[PayReq alloc] init];
          request.openID = [dic objectForKey:@"appid"];
          request.partnerId = [dic objectForKey:@"mch_id"];
          request.prepayId= [dic objectForKey:@"prepay_id"];
          request.package = @"Sign=WXPay";
          request.nonceStr= [dic objectForKey:@"nonce_str"];
          //将当前事件转化成时间戳
          NSDate *datenow = [NSDate date];
          NSString *timeSp = [NSString stringWithFormat:@"%ld", (long)[datenow timeIntervalSince1970]];
          UInt32 timeStamp =[timeSp intValue];
          request.timeStamp= timeStamp;
          // 签名加密
          DataMD5 *md5 = [[DataMD5 alloc] init];
          request.sign=[md5 createMD5SingForPay:request.openID partnerid:request.partnerId prepayid:request.prepayId package:request.package noncestr:request.nonceStr timestamp:request.timeStamp];
          // 调用微信
          [WXApi sendReq:request];
          [MBProgressHUD hideHUD];
      }else{
          LXLog(@"参数不正确，请检查参数");
          [MBProgressHUD hideHUD];
          [MBProgressHUD showError:@"支付错误！"];
      }
  } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
      LXLog(@"error is %@",error);
      [MBProgressHUD hideHUD];
      [MBProgressHUD showError:@"未完成支付"];
  }];
}

#pragma mark - 产生随机订单号
- (NSString *)generateTradeNO {
  static int kNumber = 15;

  NSString *sourceStr = @"0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  NSMutableString *resultStr = [[NSMutableString alloc] init];
  srand(time(0)); // 此行代码有警告: 
  for (int i = 0; i < kNumber; i++) {
      unsigned index = rand() % [sourceStr length];
      NSString *oneStr = [sourceStr substringWithRange:NSMakeRange(index, 1)];
      [resultStr appendString:oneStr];
  }
  return resultStr;
}

#pragma mark - WXApiDelegate
-(void)onResp:(BaseResp *)resp {
  if ([resp isKindOfClass:[PayResp class]]) {
      PayResp*response=(PayResp*)resp;  // 微信终端返回给第三方的关于支付结果的结构体
      switch (response.errCode) {
          case WXSuccess:
          {// 支付成功，向后台发送消息
              LXLog(@"支付成功");
              [[NSNotificationCenter defaultCenter] postNotificationName:@"WX_PaySuccess" object:nil];
        }
              break;
          case WXErrCodeCommon:
          { //签名错误、未注册APPID、项目设置APPID不正确、注册的APPID与设置的不匹配、其他异常等
              [MBProgressHUD showError:@"支付失败"];
              LXLog(@"支付失败");
        }
              break;
          case WXErrCodeUserCancel:
          { //用户点击取消并返回
              LXLog(@"取消支付");
              [MBProgressHUD showError:@"取消支付"];
          }
              break;
          case WXErrCodeSentFail:
          { //发送失败
              LXLog(@"发送失败");
              [MBProgressHUD showError:@"发送失败"];
          }
              break;
          case WXErrCodeUnsupport:
          { //微信不支持
              LXLog(@"微信不支持");
              [MBProgressHUD showError:@"微信不支持"];
          }
              break;
          case WXErrCodeAuthDeny:
          { //授权失败
              LXLog(@"授权失败");
              [MBProgressHUD showError:@"授权失败"];
          }
              break;
          default:
              break;
      }
  }
}