相关资料
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】
1.导入SDK文件
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
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; }
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
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=%@ partid=%@ prepayid=%@ noncestr=%@ timestamp=%ld package=%@ sign=%@",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。