微信支付集成步骤

1，申请微信支付的功能，获取到开发需要的参数

2，iOS端集成微信支付

2.1项目设置APPID

在URL Scheme中设置

2.2 导入sdk，配置项目，注册APPID

2.2.1 导入demo中的sdk，

2.2.2 还需要倒入demo中的几个系统库

SystemConfiguration.framework

Security.framework

CoreTelephony.framework

Foundation.framework

UIKit.framework

libsqlite3.0.tbd

libz.tbd

2.2.3 调用API前，需要先向微信注册您的APPID，代码如下：

[WXApi registerApp：@"wxd930ea5d5a258f4f" withDescription：@"demo 2.0"];

2.2.4 设置白名单

wechat,wexin

2.3 调起支付

从服务端获取支付需要的参数

PayReq *request = [[[PayReq alloc] init] autorelease];

request.partnerId = @"10000100";

request.prepayId= @"1101000000140415649af9fc314aa427";

request.package = @"Sign=WXPay";

request.nonceStr= @"a462b76e7436e98e0ed6e13c64b4fd1c";

request.timeStamp= @"1397527777";

request.sign= @"582282D72DD2B03AD892830965F428CB16E7A256";

[WXApi sendReq：request];

2.4 支付结果回调处理

-(void)onResp：(BaseResp*)resp{
			  if ([respisKindOfClass：[PayRespclass]]){
			      PayResp*response=(PayResp*)resp;
			      switch(response.errCode){
			          caseWXSuccess：
                      			//服务器端查询支付通知或查询API返回的结果再提示成功
                      			NSlog(@"支付成功");
                      	break;
                      	default：
                      	NSlog(@"支付失败，retcode=%d",resp.errCode);
                      	break;
                  }
                  	}
                }

3 测试和dubug

用微信官方提供的http get接口进行测试

@"http://wxpay.weixin.qq.com/pub_v2/app/app_pay.php?plat=ios"

返回的数据格式如下

{
    "appid":"wxb4ba3c02aa476ea1",
    "partnerid":"1305176001",
    "package":"Sign=WXPay",
    "noncestr":"60adcb1dcd5d0e8fe903822313810988",
    "timestamp":1473724660,
    "prepayid":"wx20160913075740396ab1584b0080984714",
    "sign":"483F092E7384602E8E7F7ABA3E9F9FC1"
}

- (IBAction)payWXWithMonicSever:(UIButton *)sender {
    
    //============================================================
    // V3&V4支付流程实现
    // 注意:参数配置请查看服务器端Demo
    // 更新时间：2015年11月20日
    //============================================================
    NSString *urlString   = @"http://wxpay.weixin.qq.com/pub_v2/app/app_pay.php?plat=ios";
    //解析服务端返回json数据
    NSError *error;
    //加载一个NSURL对象
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlString]];
    //将请求的url数据放到NSData对象中
    NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
    if ( response != nil) {
        NSMutableDictionary *dict = NULL;
        //IOS5自带解析类NSJSONSerialization从response中解析出数据放到字典中
        dict = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
        
        NSLog(@"url:%@",urlString);
        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.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=%@",[dict objectForKey:@"appid"],req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );
                return  ;
            }else{
                NSLog(@"%@",[dict objectForKey:@"retmsg"]);
                return ;
            }
        }else{
            NSLog(@"%@",@"服务器返回错误，未获取到json对象");
            return ;
        }
    }else{
        NSLog(@"%@",@"服务器返回错误");
        return ;
    }
    
    
}

预支付订单接口一般由服务器调用，app本地测试时也可以使用

验证签名是否正确

验证签名是否正确可以用微信提供的这个网页，如果本地的签名结果和网页上一致那就完成了。

http://mch.weixin.qq.com/wiki/tools/signverify/

ios本地调试

本地调试可以使用微信sdk中的payRequsestHandler 类进行，下面的步骤一般不需要进行。协助后台开发调试才会使用。相当于从生成预支付订单到调起微信支付sdk的步骤全部在客户端完成。

//创建支付签名对象
    payRequsestHandler *reqHandler = [payRequsestHandler alloc];
    //初始化支付签名对象
    [reqHandler init:WX_APP_ID mch_id:WX_MCHID];
    //设置密钥
    [reqHandler setKey:WX_PARTNER_ID];
    
    
    //价格*100
    NSString *priceString=@"1";
    NSString *orderName=@"测试标题";
    
    NSString *identifierForVendor = [[[UIDevice currentDevice] identifierForVendor] UUIDString];
    
    
    
    //获取到实际调起微信支付的参数后，在app端调起支付
    NSMutableDictionary *dict = [reqHandler getPrepayWithOrderName:orderName price:priceString device:identifierForVendor];
    
    NSLog(@"dict%@",dict);
    //在payRequestHandle.mm文件里调用该方法
    
    if(dict == nil){
        //错误提示
        NSString *debug = [reqHandler getDebugifo];
        
        NSLog(@"debug %@",debug);
        
        NSLog(@"%@\n\n",debug);
    }else{
        NSLog(@"%@\n\n",[reqHandler getDebugifo]);
        //[self alert:@"确认" msg:@"下单成功，点击OK后调起支付！"];
        
        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];
        NSLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",req.openID,req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );
        
        
        
    }

常见问题

一般发现问题就是支付失败，可以逐步检查

1，是否获取到预支付id，

如果获取成功说明微信支付参数配置正确，第一步签名算法正确，获取失败则检查这些内容

2，是否付款成功

失败，检查第二步签名和调起微信sdk的参数

微信支付的金额是以分为单位，支付0.01 元需要在订单中传递price 为1。

参考资料

业务介绍

https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8_1

详细开发步骤

https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=8_5

微信支付SDK和demo下载地址

https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=11_1

预支付接口文档

https://pay.weixin.qq.com/wiki/doc/api/app/app.php?chapter=9_1

http://www.jianshu.com/p/94dcc220b2aa

来源：oschina

链接：https://my.oschina.net/u/2360054/blog/746033

标签

appid

Framework