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
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"
1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 2 //向微信注册wxd930ea5d5a258f4f 3 [WXApi registerApp:@"wxb4ba3c02aa476ea1" withDescription:@"demo 2.0"]; 4 5 return YES; 6 } 7 8 - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url { 9 return [WXApi handleOpenURL:url delegate:[WXApiManager sharedManager]]; 10 } 11 12 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { 13 return [WXApi handleOpenURL:url delegate:[WXApiManager sharedManager]]; 14 }
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。
1 // 调起微信支付 2 PayReq* req = [[[PayReq alloc] init]autorelease]; 3 req.partnerId = [dict objectForKey:@"partnerid"]; 4 req.prepayId = [dict objectForKey:@"prepayid"]; 5 req.nonceStr = [dict objectForKey:@"noncestr"]; 6 req.timeStamp = stamp.intValue; 7 req.package = [dict objectForKey:@"package"]; 8 req.sign = [dict objectForKey:@"sign"]; 9 [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
1 switch (resp.errCode) { 2 case WXSuccess: 3 strMsg = @"支付结果：成功！"; 4 NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode); 5 break; 6 7 default: 8 strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr]; 9 NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr); 10 break; 11 }
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
1 #import "WXApi.h" 2 #import "payRequsestHandler.h"
2）实现微信代理
1 @interface AppDelegate ()<WXApiDelegate> 2 3 @end
3）注册微信，及微信支付回调
1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 2 // Override point for customization after application launch. 3 //向微信注册 4 [WXApi registerApp:APP_ID withDescription:@"demo 2.0"]; 5 6 return YES; 7 } 8 9 - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url 10 { 11 return [WXApi handleOpenURL:url delegate:self]; 12 } 13 14 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation 15 { 16 return [WXApi handleOpenURL:url delegate:self]; 17 } 18 19 // 微信支付成功或者失败回调 20 -(void) onResp:(BaseResp*)resp 21 { 22 NSString *strMsg = [NSString stringWithFormat:@"errcode:%d", resp.errCode]; 23 NSString *strTitle; 24 25 if([resp isKindOfClass:[SendMessageToWXResp class]]) 26 { 27 strTitle = [NSString stringWithFormat:@"发送媒体消息结果"]; 28 } 29 if([resp isKindOfClass:[PayResp class]]){ 30 // 支付返回结果，实际支付结果需要去微信服务器端查询 31 strTitle = [NSString stringWithFormat:@"支付结果"]; 32 33 switch (resp.errCode) { 34 case WXSuccess: 35 strMsg = @"支付结果：成功！"; 36 NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode); 37 break; 38 39 default: 40 strMsg = [NSString stringWithFormat:@"支付结果：失败！retcode = %d, retstr = %@", resp.errCode,resp.errStr]; 41 NSLog(@"错误，retcode = %d, retstr = %@", resp.errCode,resp.errStr); 42 break; 43 } 44 } 45 UIAlertView *alert = [[UIAlertView alloc] initWithTitle:strTitle message:strMsg delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil, nil]; 46 [alert show]; 47 }
5.写方法直接在支付时调用
1 - (void)payForWechat 2 { 3 // 创建支付签名对象 4 payRequsestHandler *req = [[payRequsestHandler alloc] init]; 5 // 初始化支付签名对象 6 [req init:APP_ID mch_id:MCH_ID]; 7 // 设置密钥 8 [req setKey:PARTNER_ID]; 9 10 NSMutableDictionary *dict = [req sendPay_demo]; 11 12 if(dict != nil){ 13 NSMutableString *retcode = [dict objectForKey:@"retcode"]; 14 if (retcode.intValue == 0){ 15 NSMutableString *stamp = [dict objectForKey:@"timestamp"]; 16 17 // 调起微信支付 18 PayReq* req = [[PayReq alloc] init]; 19 req.openID = [dict objectForKey:@"appid"]; 20 req.partnerId = [dict objectForKey:@"partnerid"]; 21 req.prepayId = [dict objectForKey:@"prepayid"]; 22 req.nonceStr = [dict objectForKey:@"noncestr"]; 23 req.timeStamp = stamp.intValue; 24 req.package = [dict objectForKey:@"package"]; 25 req.sign = [dict objectForKey:@"sign"]; 26 [WXApi sendReq:req]; 27 //日志输出 28 NSLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",req.openID,req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign ); 29 }else{ 30 [self alert:@"提示信息" msg:[dict objectForKey:@"retmsg"]]; 31 } 32 }else{ 33 [self alert:@"提示信息" msg:@"服务器返回错误，未获取到json对象"]; 34 } 35 } 36 37 // 客户端提示信息 38 - (void)alert:(NSString *)title msg:(NSString *)msg 39 { 40 UIAlertView *alter = [[UIAlertView alloc] initWithTitle:title message:msg delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil]; 41 42 [alter show]; 43 }