IOS 集成微信支付功能的实现方法

#import "WXApi.h"
添加 代理
WXApiDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  // Override point for customization after application launch.
  //self.window.backgroundColor = [UIColor clearColor];

  // 微信支付注册
  [WXApiregisterApp:PAY_WEIXIN_ID];

  
  returnYES;
}

// ios 9.0以上系统版本回调
- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<NSString *,id> *)options
{
  // 微信
  if ([url.schemeisEqualToString:PAY_WEIXIN_ID]) {
    [WXApihandleOpenURL:url delegate:(id<WXApiDelegate>)self];
  }
  
  // 支付宝
  if ([url.schemeisEqualToString:@"SearchPigeonWorld"]) {
    //跳转支付宝钱包进行支付，处理支付结果
    [[AlipaySDKdefaultService] processOrderWithPaymentResult:urlstandbyCallback:^(NSDictionary *resultDic) {
      if ([self.appMyDelegaterespondsToSelector:@selector(payCenterWeixinOnResultWith:)]) {
        [self.appMyDelegatepayCenterWeixinOnResultWith:[resultDic[@"resultStatus"]intValue] ==9000 ? YES :NO];
      }
    }];
  }

  returnYES;
}


//支付成功时调用，回到第三方应用中 ios 9.0以下系统版本回调
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
{
  // 微信
  if ([url.schemeisEqualToString:PAY_WEIXIN_ID])
  {
    [WXApihandleOpenURL:url delegate:(id<WXApiDelegate>)self];
  }
  
  // 支付宝
  if ([url.hostisEqualToString:PAY_ALIPAY_appID]) {
    //跳转支付宝钱包进行支付，处理支付结果
    [[AlipaySDKdefaultService] processOrderWithPaymentResult:urlstandbyCallback:^(NSDictionary *resultDic) {
      if ([self.appMyDelegaterespondsToSelector:@selector(payCenterWeixinOnResultWith:)]) {
        [self.appMyDelegatepayCenterWeixinOnResultWith:[resultDic[@"resultStatus"]intValue] ==9000 ? YES :NO];
      }
    }];
  }
  
  
  returnYES;
}


/**
 微信自己的结果返回方法

 @param resp 返回结果状态
 */
- (void)onResp:(BaseResp*)resp
{
  if([respisKindOfClass:[PayRespclass]]){
    BOOL isPaySuccess =NO;
    switch (resp.errCode) {
      caseWXSuccess:
        isPaySuccess = YES;
        break;
      caseWXErrCodeUserCancel:
        isPaySuccess = NO;
        break;
      caseWXErrCodeSentFail:
        isPaySuccess = NO;
        break;
      caseWXErrCodeAuthDeny:
        isPaySuccess = NO;
        break;
      default:
        isPaySuccess = NO;
        break;
    }
    if ([self.appMyDelegaterespondsToSelector:@selector(payCenterWeixinOnResultWith:)]) {
      [self.appMyDelegatepayCenterWeixinOnResultWith:isPaySuccess];
    }
  }
}

#pragma mark 2.2.14（10）使用微信进行付款，获取微信加密信息
- (void)getWebResponsePayWeixinInfo {
  NSDictionary *parameters =@{@"key" :appDelegate.userKeyString,
                 @"foundRecordId" : [self.payInfoDictobjectForKey:@"foundRecordId"]};
  [MBProgressHUDshowMessage:@""];
  [WebDataResponseInterfaceSessionManagerPostWebDataWithApi:WEBInterFace_Good_CreateWeiXinPayOrderandParameters:parameters andSuccess:^(id successObject) {
    MYLOG(@"%@", successObject);
    [MBProgressHUDhideHUD];
    if ([successObject[@"status"]isEqualToString:@"success"]) {
      successObject = [successObject objectForKey:@"value"];
      // 微信支付
      //需要创建这个支付对象
      PayReq *req  = [[PayReqalloc] init];
      //由用户微信号和AppID组成的唯一标识，用于校验微信用户
      req.openID = successObject[@"appid"];
      
      // 商家id，在注册的时候给的
      req.partnerId = [successObjectobjectForKey:@"partnerid"];
      
      // 预支付订单这个是后台跟微信服务器交互后，微信服务器传给你们服务器的，你们服务器再传给你
      req.prepayId = [successObjectobjectForKey:@"prepayid"];
      
      // 根据财付通文档填写的数据和签名
      //这个比较特殊，是固定的，只能是即req.package = Sign=WXPay
      req.package  = [successObjectobjectForKey:@"package"];
      
      // 随机编码，为了防止重复的，在后台生成
      req.nonceStr = [successObjectobjectForKey:@"noncestr"];
      
      // 这个是时间戳，也是在后台生成的，为了验证支付的
      req.timeStamp = [[successObjectobjectForKey:@"timestamp"]doubleValue];
      
      // 这个签名也是后台做的
      req.sign = [successObjectobjectForKey:@"sign"];
      
      //发送请求到微信，等待微信返回onResp
      [WXApisendReq:req];
    } else {
      [MBProgressHUDshow:[successObject objectForKey:@"value"]icon:nilview:self.view];
    }
    
  } andFailure:^(NSError *error) {
    [MBProgressHUDhideHUD];
    MYLOG(@"error: %@", error);
  }];
}