iOS 微信支付开发流程

傷城~ 2022-06-04 07:25 380阅读 0赞

这个文章写的 比较不错 借此转发。

SDK下载：[https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=11\_1][https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_11_1]

APP端开发步骤说明：[https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8\_5][https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_8_5]

# SDK接入 #

## 服务器签名版本 ##

官方已经是建议使用服务器签名来接入微信支付，实际上从安全上考虑，确实是每个客户端不应该知道RAS密钥，也不需要每个客户端都写一遍签名的算法。

服务端接入流程文档：[https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8\_3][https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_8_3]

> 商户系统和微信支付系统主要交互说明：
> 
> 步骤1：用户在商户APP中选择商品，提交订单，选择微信支付。
> 
> 步骤2：商户后台收到用户支付单，调用微信支付统一下单接口。参见【[统一下单API][API]】。
> 
> 步骤3：统一下单接口返回正常的prepay\_id，再按签名规范重新生成签名后，将数据传输给APP。参与签名的字段名为appId，partnerId，prepayId，nonceStr，timeStamp，package。注意：package的值格式为Sign=WXPay
> 
> 步骤4：商户APP调起微信支付。api参见本章节【[app端开发步骤说明][https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_8_5]】
> 
> 步骤5：商户后台接收支付通知。api参见【[支付结果通知API][API 1]】
> 
> 步骤6：商户后台查询支付结果。，api参见【[查询订单API][API 2]】

1.导入SDK文件

![292326-20160114172939553-995809901.png][]

2.导入相关的系统库及文件。不导入会报错。

*  SystemConfiguration.framework
 *  libz.tbd 
 *  libsqlite3.0.tbd
 *  CoreTelephony.framework
 *  libc++.tbd

3.配置info.plist

a.schemes ，注意，item0 这里要修改成商户自己的APPID

![292326-20160114173300350-150848608.png][]

或者这样修改：

![292326-20160114173752257-1389211762.png][]

b.白名单

![292326-20160114173333382-2057079315.png][]

c.安全配置支持Http

![292326-20160114173401350-1230731678.png][]

当然这部分的配置，也可以通过修改XML来实现。

![292326-20160114173527319-893757257.png][]

4.修改bitcode。

![292326-20160120135711578-309257643.png][]

修改：

![292326-20160120135805437-1293881831.png][]

5.在AppDelegate 注册微信

导入\#import "WXApiManager.h"

![复制代码][copycode.gif]

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        //向微信注册wxd930ea5d5a258f4f
        [WXApi registerApp:@"wxb4ba3c02aa476ea1" withDescription:@"demo 2.0"];
        
        return YES;
    }
    
    - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
        return  [WXApi handleOpenURL:url delegate:[WXApiManager sharedManager]];
    }
    
    - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
        return [WXApi handleOpenURL:url delegate:[WXApiManager sharedManager]];
    }

![复制代码][copycode.gif]

6.接下来，就是发起请求支付了，实现上核心代码只有几行。

这部分代码在demo的WXApiRequestHandler--》jumpToBizPay 里。

![复制代码][copycode.gif]

//调起微信支付
                        PayReq* req             = [[[PayReq alloc] init]autorelease];
                        req.partnerId           = [dict objectForKey:@"partnerid"];
                        req.prepayId            = [dict objectForKey:@"prepayid"];
                        req.nonceStr            = [dict objectForKey:@"noncestr"];
                        req.timeStamp           = stamp.intValue;
                        req.package             = [dict objectForKey:@"package"];
                        req.sign                = [dict objectForKey:@"sign"];
                        [WXApi sendReq:req];

![复制代码][copycode.gif]

7.不管支付成功还是失败，结果会返回到WXApiManager--》onResp 方法下

![复制代码][copycode.gif]

switch (resp.errCode) {
                case WXSuccess:
                    strMsg = @"支付结果：成功！";
                    NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
                    break;
                    
                default:
                    strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
                    NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr);
                    break;
            }

![复制代码][copycode.gif]

我们直接处理回调结果即可。

## 客户端进行签名 ##

1.导入文件。官方已经不提供这个SDK的下载了，我已经打包到源代码了，2015年3月11号最新修改的版本

![292326-20160114183115100-851859195.png][]

2.里面有两个文件是非arc的，我们需要设置一下 -fno-objc-arc

![292326-20160114183205210-1022682077.png][]

3.导入系统库及info.list配置，请参数上面服务端签名。

4.AppDelegate配置

1）导入头文件

#import "WXApi.h"
    #import "payRequsestHandler.h"

2）实现微信代理

@interface AppDelegate ()<WXApiDelegate>
    
    @end

3）注册微信，及微信支付回调

![复制代码][copycode.gif]

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
        // Override point for customization after application launch.
        //向微信注册
        [WXApi registerApp:APP_ID withDescription:@"demo 2.0"];
        
        return YES;
    }
    
    - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url
    {
        return  [WXApi handleOpenURL:url delegate:self];
    }
    
    - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
    {
        return  [WXApi handleOpenURL:url delegate:self];
    }
    
    // 微信支付成功或者失败回调
    -(void) onResp:(BaseResp*)resp
    {
        NSString *strMsg = [NSString stringWithFormat:@"errcode:%d", resp.errCode];
        NSString *strTitle;
        
        if([resp isKindOfClass:[SendMessageToWXResp class]])
        {
            strTitle = [NSString stringWithFormat:@"发送媒体消息结果"];
        }
        if([resp isKindOfClass:[PayResp class]]){
            //支付返回结果，实际支付结果需要去微信服务器端查询
            strTitle = [NSString stringWithFormat:@"支付结果"];
            
            switch (resp.errCode) {
                case WXSuccess:
                    strMsg = @"支付结果：成功！";
                    NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
                    break;
                    
                default:
                    strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
                    NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr);
                    break;
            }
        }
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
        [alert show];
    }

![复制代码][copycode.gif]

5.写方法直接在支付时调用

![复制代码][copycode.gif]

- (void)payForWechat
    {
        //创建支付签名对象
        payRequsestHandler *req = [[payRequsestHandler alloc] init];
        //初始化支付签名对象
        [req init:APP_ID mch_id:MCH_ID];
        //设置密钥
        [req setKey:PARTNER_ID];
        
        NSMutableDictionary *dict = [req sendPay_demo];
        
        if(dict != nil){
            NSMutableString *retcode = [dict objectForKey:@"retcode"];
            if (retcode.intValue == 0){
                NSMutableString *stamp  = [dict objectForKey:@"timestamp"];
                
                //调起微信支付
                PayReq* req             = [[PayReq alloc] init];
                req.openID              = [dict objectForKey:@"appid"];
                req.partnerId           = [dict objectForKey:@"partnerid"];
                req.prepayId            = [dict objectForKey:@"prepayid"];
                req.nonceStr            = [dict objectForKey:@"noncestr"];
                req.timeStamp           = stamp.intValue;
                req.package             = [dict objectForKey:@"package"];
                req.sign                = [dict objectForKey:@"sign"];
                [WXApi sendReq:req];
                //日志输出
                NSLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",req.openID,req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );
            }else{
                [self alert:@"提示信息" msg:[dict objectForKey:@"retmsg"]];
            }
        }else{
            [self alert:@"提示信息" msg:@"服务器返回错误，未获取到json对象"];
        }
    }
    
    //客户端提示信息
    - (void)alert:(NSString *)title msg:(NSString *)msg
    {
        UIAlertView *alter = [[UIAlertView alloc] initWithTitle:title message:msg delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
        
        [alter show];
    }

![复制代码][copycode.gif]

最后，修改payRequsestHandler.h文件里的APP\_ID 和MCH\_ID即可使用。

原文地址：http://blog.csdn.net/mingenlong/article/details/52400409

[https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_11_1]: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=11_1
[https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_8_5]: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8_5
[https_pay.weixin.qq.com_wiki_doc_api_app.php_chapter_8_3]: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8_3
[API]: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=9_1
[API 1]: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=9_7
[API 2]: https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=9_2
[292326-20160114172939553-995809901.png]: /images/20220604/3521c73c524048bdb2eef1ec4ef4c02f.png
[292326-20160114173300350-150848608.png]: /images/20220604/691fec901f6f479ebce4357dc52dd259.png
[292326-20160114173752257-1389211762.png]: /images/20220604/462f400d474d4629a5e262dda1951b5e.png
[292326-20160114173333382-2057079315.png]: /images/20220604/06b435f98edf4536bfe9d465060c9a7e.png
[292326-20160114173401350-1230731678.png]: /images/20220604/6a9acb37b7944605a19a6c911d372b6d.png
[292326-20160114173527319-893757257.png]: /images/20220604/c34cdb7fcb534b46b3142da622b2c32f.png
[292326-20160120135711578-309257643.png]: /images/20220604/88352a49b4654bc4ad829937c38d4d23.png
[292326-20160120135805437-1293881831.png]: /images/20220604/1c9d61bfbdc74e8a8f6c66986f820292.png
[copycode.gif]: /images/20220604/bca7e5c1237a4bebaa16c1e16913d227.png
[292326-20160114183115100-851859195.png]: /images/20220604/cbb7fe5ece204a54b4a7af71d5b7ce32.png
[292326-20160114183205210-1022682077.png]: /images/20220604/d9f28f6d45524b9fa825f03168e174e8.png