1.支付流程
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。
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。
步骤5：商户后台接收支付通知。
步骤6：商户后台查询支付结果。
2. 将微信支付的SDK塞进工程
3.配置info.plist
a.schemes
b.白名单
c.安全配置支持Http
4.配置路径
Library search Paths : $(PROJECT_DIR)/XWMerchant/ThirdParts/Wechat/SDKExport
5. 配置payRequsestHandler.h文件
#define APPP_ID @"" //APPID
#define APP_SECRET @"" //appsecret
//商户号，填写商户对应参数
#define MCH_ID @""
//商户API密钥，填写相应参数为了MD5加密
#define PARTNER_ID @""
//支付结果回调页面
#define NOTIFY_URL @"http://wxpay.weixin.qq.com/pub_v2/pay/notify.v2.php"
//获取服务器端支付数据地址（商户自定义）
#define SP_URL @"http://wxpay.weixin.qq.com/pub_v2/app/app_pay.php"
6.支付
a.在
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 方法中注册一下先：
if ([WXApi registerApp:APPP_ID withDescription:@"weixin"]){
DLog(@"注册成功");
}else{
DLog(@"注册失败");
}
b.在
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation代理中
if ([url.host isEqualToString:@"pay"]) {
[WXApi handleOpenURL:url delegate:self];
}支持回调
c.在需要支付的页面调用如下方法，记得包含头文件
#pragma mark ==============微信支付==============- (void) wechatPay:(NSDictionary *)dic{//目前只需要prepay_idNSLog(@"开始微信支付");//首先判断是否安装wechatif([WXApi isWXAppInstalled]){//生成订单 NSLog(@"l-----:%@ ",dic);NSString *prePayid = dic[@"prepay_id"];// //获取到prepayid后进行第二次签名 NSString *package, *time_stamp, *nonce_str;//设置支付参数 time_t now;time(&now);time_stamp = [NSString stringWithFormat:@"%ld", now];nonce_str = [WXUtil md5:time_stamp];//重新按提交格式组包，微信客户端暂只支持package=Sign=WXPay格式，须考虑升级后支持携带package具体参数的情况//package = [NSString stringWithFormat:@"Sign=%@",package];package = @"Sign=WXPay";//第二次签名参数列表NSMutableDictionary *signParams = [NSMutableDictionary dictionary];[signParams setObject: APPP_ID forKey:@"appid"];[signParams setObject: nonce_str forKey:@"noncestr"];[signParams setObject: package forKey:@"package"];[signParams setObject: MCH_ID forKey:@"partnerid"];[signParams setObject: time_stamp forKey:@"timestamp"];[signParams setObject: prePayid forKey:@"prepayid"];//[signParams setObject: @"MD5" forKey:@"signType"];//生成签名NSString *sign = [self createMd5Sign:signParams];//获取微信预付款idif ( prePayid != nil && sign != nil) {//调起微信支付PayReq* req = [[PayReq alloc] init];req.openID = APPP_ID;//req.partnerId = MCH_ID;//商户号req.prepayId = prePayid;//预付订单号，后台返回的req.nonceStr = nonce_str;//随机串 req.timeStamp = time_stamp.intValue;//时间戳 req.package = @"Sign=WXPay";//此地方一定要写成这种格式，后台生成预付订单时也是如此，不要写成prepay_id = @"wx...."req.sign = sign; BOOL sendRes = [WXApi sendReq:req];if (sendRes) {NSLog(@"唤起成功");}else {NSLog(@"唤起失败");}//日志输出DLog(@"appid=%@\npartid=%@\nprepayid=%@\nnoncestr=%@\ntimestamp=%ld\npackage=%@\nsign=%@",req.openID,req.partnerId,req.prepayId,req.nonceStr,(long)req.timeStamp,req.package,req.sign );}else{DLog(@"预付订单生成失败");[XWPrompt showPromptMessage:@"订单失败"];}}else{[SMAlertView showAlertWithTitle:@"您还没有安装微信" message:@"是否安装？" cancelTitle:@"否" cancelTitleColor:colorForDeepGrayNormal otherTitle:@"是" otherTitleColor:colorForNavBgColor completion:^(BOOL cancelled) {if (!cancelled) {DLog(@"%d",cancelled);[[ UIApplication sharedApplication] openURL:[NSURL URLWithString:[WXApi getWXAppInstallUrl]]];}}];} }//创建package签名 -(NSString*) createMd5Sign:(NSMutableDictionary*)dict {NSMutableString *contentString =[NSMutableString string];NSArray *keys = [dict allKeys];//按字母顺序排序NSArray *sortedArray = [keys sortedArrayUsingComparator:^NSComparisonResult(id obj1, id obj2) {return [obj1 compare:obj2 options:NSNumericSearch];}];//拼接字符串for (NSString *categoryId in sortedArray) {if ( ![[dict objectForKey:categoryId] isEqualToString:@""]&& ![categoryId isEqualToString:@"sign"]&& ![categoryId isEqualToString:@"key"]){[contentString appendFormat:@"%@=%@&", categoryId, [dict objectForKey:categoryId]];}}//添加key字段[contentString appendFormat:@"key=%@", PARTNER_ID];//得到MD5 sign签名NSString *md5Sign =[WXUtil md5:contentString];return md5Sign; }
基本上就能支付成功了，如不成功，请仔细检查一下plist文件的配置白名单，安全，sechems，路径，密钥PARTNER_ID，一定要二次签名，要不支付不成功，特别是唤起支付时[WXApi sendReq:req];总是不成功，而且后台生成预付订单时一定要package ＝ @"Sign=WXPay" ，另一个最他妈坑的就是一定不要用shareSDK，它里面的微信分享的包和微信支付的包冲突，会唤起失败，我就是把shareSDK删除了就能唤起支付页面。微信分享用官网自带的吧，不要用第三分的集成了，太他妈的坑了，坑了半天的时间。就此支付成功了。。。。