iOS开发微信SDK的集成（分享、支付）

在我们的App中是很经常的会用到微信的两个功能，1就是分享，2就是支付（通常会和支付宝、银联支付放在一起使用),通常接入这种三方的东西，对于移动端来说，过程都比较简单，但是对于后台来说，一般也不是说难，就是步骤多，配置的东西比移动端多（像比如支付过程）, 废话不多说，由于我这里的分享只需要做微信的分享，所以过程比较简单，配置什么的就不多说了，自己去看微信支付的UML流程图和微信SDK的配置流程，对于iOS端的代码如下:
首先在工程里面配置白名单：

white list.png

AppDelegate里面初始化微信SDK：

    [WXApi registerApp:kWeChatID];

支付or分享代码：

[ShareView shareViewWithCompleteHandel:^(NSInteger index) {
                WXMediaMessage * message = [WXMediaMessage message];
                message.title = [NSString stringWithFormat:@"%@[%@k-%@k]",rel[@"job_name"],rel[@"salary_min"],rel[@"salary_max"]];
                message.description = [NSString stringWithFormat:@"入职快,加薪快,还能赚外快\n%@",rel[@"com_name"]];
                [message setThumbImage:image];
                WXWebpageObject * webpageObject = [WXWebpageObject object];
                webpageObject.webpageUrl = urlString;
                message.mediaObject = webpageObject;
                SendMessageToWXReq * req = [[SendMessageToWXReq alloc] init];
                req.bText = NO;
                req.message  = message;
                req.scene =  index == 0 ? WXSceneSession :index == 1 ? WXSceneTimeline:WXSceneFavorite;
                [WXApi sendReq:req];
            }];

// 支付，note：这里的repsonse是后台生成的支付参数，下订单是请求自己的服务端拿到这些参数：
if ([responese isKindOfClass:[NSDictionary class]]) {
                NSDictionary *payParams = (NSDictionary *)responese;
                PayReq * req            = [[PayReq alloc] init];
                req.partnerId           = payParams[@"partnerid"];
                req.prepayId            = payParams[@"prepayid"];
                req.nonceStr            = payParams[@"noncestr"];
                req.timeStamp           = [payParams[@"timestamp"] intValue];
                req.package             = payParams[@"package"];
                req.sign                = payParams[@"sign"];
                [WXApi sendReq:req];
            }

支付or分享结果的回调：

// MARK: -  处理三方回调
- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary*)options {
    //判断是微信还是支付宝操作
    if ([url.absoluteString rangeOfString:kWeChatID].location != NSNotFound){
        return  [WXApi handleOpenURL:url delegate:self];
    } else {
        if ([url.host isEqualToString:@"safepay"]) {
            //支付宝支付回调自己App的结果
            [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
                NSLog(@"result = %@",resultDic);
            }];
        }
        return YES;
    }
}

- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
    if ([url.absoluteString rangeOfString:kWeChatID].location != NSNotFound) {
        return [WXApi handleOpenURL:url delegate:self];
    } else if ([url.host isEqualToString:@"safepay"]) {
        [[AlipaySDK defaultService] processAuthResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
        }];
    }
    return YES;
}

// MARK: - WXApiDelegate
- (void)onResp:(BaseResp *)resp {
    if ([resp isKindOfClass:[PayResp class]]){
        //支付
        PayResp *response = (PayResp*)resp;
        switch(response.errCode){
                case 0:
                //服务器端查询支付通知或查询API返回的结果再提示成功
                [[NSNotificationCenter defaultCenter] postNotificationName:kWeChatPaySucessNotificationName object:self userInfo:@{@"PayResp":resp}];
                [_window.rootViewController alertWithTitle:@"支付成功!" complete:nil];
                break;
                case -1:
                case -2: {
                    [_window.rootViewController alertWithTitle:@"支付失败!" complete:nil];
                }
                break;
            default:
                NSLog(@"支付失败，retcode=%d",resp.errCode);
                break;
        }
    } else if ([resp isKindOfClass:[SendMessageToWXResp class]]) {
        //分享
        SendMessageToWXResp *sendMessageRes = (SendMessageToWXResp *)resp;
        if (sendMessageRes.errCode == 0 ) {
            [_window.rootViewController alertWithTitle:@"分享成功!" complete:nil];
        } else if (sendMessageRes.errCode == WXErrCodeUserCancel) {
            [_window.rootViewController alertWithTitle:@"您取消了分享!" complete:nil];
        } else {
            [_window.rootViewController alertWithTitle:@"分享失败!" complete:nil];
        }
    }
}

- (BOOL)application:(UIApplication *)application
            openURL:(NSURL *)url
  sourceApplication:(NSString *)sourceApplication
         annotation:(id)annotation {
    if ([url.host isEqualToString:@"safepay"]) {
        //跳转支付宝钱包进行支付，处理支付结果
        [[AlipaySDK defaultService] processOrderWithPaymentResult:url standbyCallback:^(NSDictionary *resultDic) {
            NSLog(@"result = %@",resultDic);
        }];
    }
    return YES;
}

集成起来比较简单，由于这里的支付请求加密参数是放在后台进行的（也理论上是后台做比较安全，为了防止反编译，一般是后台做）App端做的事情相对来来说还是比较少的。