iOS微信支付

SDK接入

服務器簽名版本

官方已是建議使用服務器簽名來接入微信支付，實際上從安全上考慮，確實是每一個客戶端不該該知道RAS密鑰，也不須要每一個客戶端都寫一遍簽名的算法。

服務端接入流程文檔：https://pay.weixin.qq.com/wiki/doc/api/app.php?chapter=8_3

商戶系統和微信支付系統主要交互說明：

步驟1：用戶在商戶APP中選擇商品，提交訂單，選擇微信支付。

步驟2：商戶後臺收到用戶支付單，調用微信支付統一下單接口。參見【統一下單API】。

步驟3：統一下單接口返回正常的prepay_id，再按簽名規範從新生成簽名後，將數據傳輸給APP。參與簽名的字段名爲appId，partnerId，prepayId，nonceStr，timeStamp，package。注意：package的值格式爲Sign=WXPay

步驟4：商戶APP調起微信支付。api參見本章節【app端開發步驟說明】

步驟5：商戶後臺接收支付通知。api參見【支付結果通知API】

步驟6：商戶後臺查詢支付結果。，api參見【查詢訂單API】

1.導入SDK文件

2.導入相關的系統庫及文件。不導入會報錯。

• SystemConfiguration.framework
• libz.tbd 
• libsqlite3.0.tbd
• CoreTelephony.framework

3.配置info.plist

a.schemes ，注意，item0 這裏要修改爲商戶本身的APPID

或者這樣修改：

b.白名單

c.安全配置支持Http

固然這部分的配置，也能夠經過修改XML來實現。

4.修改bitcode。

修改：

5.在AppDelegate 註冊微信

導入#import "WXApiManager.h"

 1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 2     //向微信註冊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.接下來，就是發起請求支付了，實現上核心代碼只有幾行。

這部分代碼在demo的WXApiRequestHandler--》jumpToBizPay 裏。

1   // 調起微信支付
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.無論支付成功仍是失敗，結果會返回到WXApiManager--》onResp 方法下

 1 switch (resp.errCode) {
 2             case WXSuccess:
 3                 strMsg = @"支付結果：成功！";
 4                 NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
 5                 break;
 6                 
 7             default:
 8                 strMsg = [NSString stringWithFormat:@"支付結果：失敗！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
 9                 NSLog(@"錯誤，retcode = %d, retstr = %@", resp.errCode,resp.errStr);
10                 break;
11         }

咱們直接處理回調結果便可。

客戶端進行簽名

1.導入文件。官方已經不提供這個SDK的下載了，我已經打包到源代碼了，2015年3月11號最新修改的版本

 

2.裏面有兩個文件是非arc的，咱們須要設置一下 -fno-objc-arc

3.導入系統庫及info.list配置，請參數上面服務端簽名。

4.AppDelegate配置

1）導入頭文件

1 #import "WXApi.h"
2 #import "payRequsestHandler.h"

2）實現微信代理

1 @interface AppDelegate ()<WXApiDelegate>
2 
3 @end

 

3）註冊微信，及微信支付回調

 1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
 2     // Override point for customization after application launch.
 3     //向微信註冊
 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敗回調
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:@"發送媒體消息結果"];
28     }
29     if([resp isKindOfClass:[PayResp class]]){
30         // 支付返回結果，實際支付結果須要去微信服務器端查詢
31         strTitle = [NSString stringWithFormat:@"支付結果"];
32         
33         switch (resp.errCode) {
34             case WXSuccess:
35                 strMsg = @"支付結果：成功！";
36                 NSLog(@"支付成功－PaySuccess，retcode = %d", resp.errCode);
37                 break;
38                 
39             default:
40                 strMsg = [NSString stringWithFormat:@"支付結果：失敗！retcode = %d, retstr = %@", resp.errCode,resp.errStr];
41                 NSLog(@"錯誤，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.寫方法直接在支付時調用

 1 - (void)payForWechat
 2 {
 3     // 建立支付簽名對象
 4     payRequsestHandler *req = [[payRequsestHandler alloc] init];
 5     // 初始化支付簽名對象
 6     [req init:APP_ID mch_id:MCH_ID];
 7     // 設置密鑰
 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             // 調起微信支付
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             //日誌輸出
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:@"服務器返回錯誤，未獲取到json對象"];
34     }
35 }
36 
37 // 客戶端提示信息
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 }