iOS接入微信支付
iOS接入微信支付
微信支付SDK比支付宝的SDK好了不知道多少倍，坑也少了好多，简直是支付类SDK中的良心之作！！
准备
首先要去微信申请一个账号，分别有商户API密钥和商户号 https://open.weixin.qq.com/
下载SDK
目前微信SDK已经升级到了（1.6.2）。但是我现在用的是上一个版本SDK，这里有下载
为什么不用最新的呢？因为最新的SDK里面要求签名加密等操作在服务器上完成然后返回给手机端，然而……额，我这个项目的后台比较菜，不知道签名是怎么回事。而我比他更菜，我懒得自己写md5加密，所以就用了老版本的SDK。老版本SDK自带了各种各样加密方法，网上教程也比较多，所以很容易集成。
当然，微信这么做也是有原因的，你把私钥放到了每一台手机上用来做签名……这样跟泄露了私钥有什么区别～
运行DEMO
SDKSample下的demo跑一遍，没有什么问题，没有支付宝那么坑～～
lib文件夹下payRequsestHandler.h文件中填上APP_ID、APP_SECRET、MCH_ID、PARTNER_ID的值，然后运行demo，试一下能否完成支付，如果可以就可以进行下一步接入工作了。
接入
将SDKExport下的libWeChatSDK.a、WXApi.h、WXApiObject.h三个文件拖入工程中，再把lib文件夹拖入工程中。。可能会有报错，ApiXml.m中报错那两行注释掉就好
支付代码：
// WechatPayManager.h
#import <Foundation/Foundation.h>
#import "WXApiObject.h"
#import "WXApi.h"
// 账号帐户资料
// 更改商户把相关参数后可测试
#define APP_ID @"XXX" //APPID
#define APP_SECRET @"XXX" //appsecret,看起来好像没用
//商户号，填写商户对应参数
#define MCH_ID @"XXX"
//商户API密钥，填写相应参数
#define PARTNER_ID @"XXX"
//支付结果回调页面
#define NOTIFY_URL @"http://wxpay.weixin.qq.com/pub_v2/pay/notify.v2.php"
#define SP_URL @"http://wxpay.weixin.qq.com/pub_v2/app/app_pay.php"
@interface WechatPayManager : NSObject
{
}
//预支付网关url地址
@property (nonatomic,strong) NSString* payUrl;
//debug信息
@property (nonatomic,strong) NSMutableString *debugInfo;
@property (nonatomic,assign) NSInteger lastErrCode;//返回的错误码
//商户关键信息
@property (nonatomic,strong) NSString *appId,*mchId,*spKey;
//初始化函数
-(id)initWithAppID:(NSString*)appID
mchID:(NSString*)mchID
spKey:(NSString*)key;
//获取当前的debug信息
-(NSString *) getDebugInfo;
//获取预支付订单信息（核心是一个prepayID）
- (NSMutableDictionary*)getPrepayWithOrderName:(NSString*)name
price:(NSString*)price
device:(NSString*)device;
@end// WechatPayManager.m
#import "WechatPayManager.h"
#import "WXUtil.h"
#import "ApiXml.h"
@implementation WechatPayManager
//初始化函数
-(id)initWithAppID:(NSString*)appID mchID:(NSString*)mchID spKey:(NSString*)key
{
self = [super init];
if(self)
{
//初始化私有参数，主要是一些和商户有关的参数
self.payUrl = @"https://api.mch.weixin.qq.com/pay/unifiedorder";
if (self.debugInfo == nil){
self.debugInfo = [NSMutableString string];
}
[self.debugInfo setString:@""];
self.appId = appID;//微信分配给商户的appID
self.mchId = mchID;//
self.spKey = key;//商户的密钥
}
return self;
}
//获取debug信息
-(NSString*) getDebugInfo
{
NSString *res = [NSString stringWithString:self.debugInfo];
[self.debugInfo setString:@""];
return res;
}
//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=%@", self.spKey];
//得到MD5 sign签名
NSString *md5Sign =[WXUtil md5:contentString];
//输出Debug Info
[self.debugInfo appendFormat:@"MD5签名字符串：\n%@\n\n",contentString];
return md5Sign;
}
//获取package带参数的签名包
-(NSString *)genPackage:(NSMutableDictionary*)packageParams
{
NSString *sign;
NSMutableString *reqPars=[NSMutableString string];
//生成签名
sign = [self createMd5Sign:packageParams];
//生成xml的package
NSArray *keys = [packageParams allKeys];
[reqPars appendString:@"<xml>\n"];
for (NSString *categoryId in keys) {
[reqPars appendFormat:@"<%@>%@</%@>\n", categoryId, [packageParams objectForKey:categoryId],categoryId];
}
[reqPars appendFormat:@"<sign>%@</sign>\n</xml>", sign];
return [NSString stringWithString:reqPars];
}
//提交预支付
-(NSString *)sendPrepay:(NSMutableDictionary *)prePayParams
{
NSString *prepayid = nil;
//获取提交支付
NSString *send = [self genPackage:prePayParams];
//输出Debug Info
[self.debugInfo appendFormat:@"API链接:%@\n", self.payUrl];
[self.debugInfo appendFormat:@"发送的xml:%@\n", send];
//发送请求post xml数据
NSData *res = [WXUtil httpSend:self.payUrl method:@"POST" data:send];
//输出Debug Info
[self.debugInfo appendFormat:@"服务器返回：\n%@\n\n",[[NSString alloc] initWithData:res encoding:NSUTF8StringEncoding]];
XMLHelper *xml = [[XMLHelper alloc] init];
//开始解析
[xml startParse:res];
NSMutableDictionary *resParams = [xml getDict];
//判断返回
NSString *return_code = [resParams objectForKey:@"return_code"];
NSString *result_code = [resParams objectForKey:@"result_code"];
if ( [return_code isEqualToString:@"SUCCESS"] )
{
//生成返回数据的签名
NSString *sign = [self createMd5Sign:resParams ];
NSString *send_sign =[resParams objectForKey:@"sign"] ;
//验证签名正确性
if( [sign isEqualToString:send_sign]){
if( [result_code isEqualToString:@"SUCCESS"]) {
//验证业务处理状态
prepayid = [resParams objectForKey:@"prepay_id"];
return_code = 0;
[self.debugInfo appendFormat:@"获取预支付交易标示成功！\n"];
}
}else{
self.lastErrCode = 1;
[self.debugInfo appendFormat:@"gen_sign=%@\n _sign=%@\n",sign,send_sign];
[self.debugInfo appendFormat:@"服务器返回签名验证错误！！！\n"];
}
}else{
self.lastErrCode = 2;
[self.debugInfo appendFormat:@"接口返回错误！！！\n"];
}
return prepayid;
}
- (NSMutableDictionary*)getPrepayWithOrderName:(NSString*)name
price:(NSString*)price
device:(NSString*)device
{
//订单标题，展示给用户
NSString* orderName = name;
//订单金额,单位（分）
NSString* orderPrice = price;//以分为单位的整数
//支付设备号或门店号
NSString* orderDevice = device;
//支付类型，固定为APP
NSString* orderType = @"APP";
//发器支付的机器ip,暂时没有发现其作用
NSString* orderIP = @"196.168.1.1";
//随机数串
srand( (unsigned)time(0) );
NSString *noncestr = [NSString stringWithFormat:@"%d", rand()];
NSString *orderNO = [NSString stringWithFormat:@"%ld",time(0)];
//================================
//预付单参数订单设置
//================================
NSMutableDictionary *packageParams = [NSMutableDictionary dictionary];
[packageParams setObject: self.appId forKey:@"appid"]; //开放平台appid
[packageParams setObject: self.mchId forKey:@"mch_id"]; //商户号
[packageParams setObject: orderDevice forKey:@"device_info"]; //支付设备号或门店号
[packageParams setObject: noncestr forKey:@"nonce_str"]; //随机串
[packageParams setObject: orderType forKey:@"trade_type"]; //支付类型，固定为APP
[packageParams setObject: orderName forKey:@"body"]; //订单描述，展示给用户
[packageParams setObject: NOTIFY_URL forKey:@"notify_url"]; //支付结果异步通知
[packageParams setObject: orderNO forKey:@"out_trade_no"];//商户订单号
[packageParams setObject: orderIP forKey:@"spbill_create_ip"];//发器支付的机器ip
[packageParams setObject: orderPrice forKey:@"total_fee"]; //订单金额，单位为分
//获取prepayId（预支付交易会话标识）
NSString *prePayid;
prePayid = [self sendPrepay:packageParams];
if(prePayid == nil)
{
[self.debugInfo appendFormat:@"获取prepayid失败！\n"];
return nil;
}
//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: self.appId forKey:@"appid"];
[signParams setObject: self.mchId forKey:@"partnerid"];
[signParams setObject: nonce_str forKey:@"noncestr"];
[signParams setObject: package forKey:@"package"];
[signParams setObject: time_stamp forKey:@"timestamp"];
[signParams setObject: prePayid forKey:@"prepayid"];
//生成签名
NSString *sign = [self createMd5Sign:signParams];
//添加签名
[signParams setObject: sign forKey:@"sign"];
[self.debugInfo appendFormat:@"第二步签名成功，sign＝%@\n",sign];
//返回参数列表
return signParams;
}
@end支付函数 调用这个函数即可完成支付～
- (void)wxPayWithOrderName:(NSString*)name price:(NSString*)price
{
//创建支付签名对象 && 初始化支付签名对象
WechatPayManager* wxpayManager = [[WechatPayManager alloc]initWithAppID:APP_ID mchID:MCH_ID spKey:PARTNER_ID];
//获取到实际调起微信支付的参数后，在app端调起支付
//生成预支付订单，实际上就是把关键参数进行第一次加密。
NSString* device = @"aaaaaa";//[[ defaultManager]userId];
NSMutableDictionary *dict = [wxpayManager getPrepayWithOrderName:name
price:price
device:device];
if(dict == nil){
//错误提示
NSString *debug = [wxpayManager getDebugInfo];
NSLog(@"%@",debug);
return;
}
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"];
BOOL flag = [WXApi sendReq:req];
if (!flag) {
NSLog(@"ERROR!");
}
}可能遇到的问题
"OBJC_CLASS$_CTTelephonyNetworkInfo" 报错
"Undefined symbols for architecture armv7:"报错
在General->Linked Frameworks and Libraries中加入以下Libraries:
写的比较仓促，如果发现什么问题请留言，我一定会回复的～