玩转微信支付全过程

相关资料下载

SDK下载：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

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

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。

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

步骤5：商户后台接收支付通知。api参见支付结果通知API

步骤6：商户后台查询支付结果。，api参见查询订单API

具体步骤

1.导入SDK文件

2.导入相关的系统库及文件。不导入会报错。

1.SystemConfiguration.framework
2.libz.tbd 
3.libsqlite3.0.tbd
4.CoreTelephony.framework

3.配置info.plist

a. schemes ，注意，item0 这里要修改成商户自己的APPID

或者这样修改：

b.白名单

c. 安全配置支持Http

当然这部分的配置，也可以通过修改XML来实现。

4.修改bitcode。

修改：

5.在AppDelegate 注册微信

导入#import “WXApiManager.h”

- (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]];
}

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。

                    //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];

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

 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;
        }

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

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

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

- (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];
}

5.写方法直接在支付时调用

- (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];
}

最后，修改payRequsestHandler.h文件里的APP_ID 和MCH_ID即可使用。
有什么技术问题可以加我微信:

源码下载地址:http://download.csdn.net/download/jys1216/9411425