目前项目里有微信支付的需求，调研过一段时间后，发现其实并没有想象中的那么困难。如果你只是想实现该功能，一个方法足以，但是若你想深入了解实现原理。就需要花费更多的功夫了。目前我只清楚微信支付需要做签名，一种是在后台签名，一种是自己在前端签名。其实这对前端来说代码量并没有多大的改变，最大的区别是在后台签名逻辑更容易理解，而在前端签名逻辑有些混乱。
现在，小编也只是知道怎么使用，而不得其精髓，现在我附上我的学习链接，为了避免以后链接出现不可用情况，请各位理解小编的粘贴复制。
博客园（幻想无极） http://www.cnblogs.com/hxwj/p/4563351.html
微信支付开发文档 http://mch.weixin.qq.com/wiki/doc/api/app.php?chapter=8_1
iOS第三方支付－微信支付
微信支付用到的文件
1.首先支持非arc
2.设置URL types
3.AppDelegate
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[WXApi registerApp:@"wxd930ea5d5a258f4f" withDescription:@"demo 2.0"];
return YES;
}
4.微信回调
//处理微信通过URL启动App时传递的数据
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
return [WXApi handleOpenURL:url delegate:self];
}
//微信回调
- (void)onResp:(BaseResp *)resp {
//errCode
switch (resp.errCode) {
case WXSuccess:
//成功回调
break;
default:
break;
}
}
5.调用微信支付（主要代码，后台签名）
//调起微信支付
PayReq* req = [[PayReq alloc] init];
req.openID = APPI_ID;
req.partnerId = PARTNER_ID;
req.prepayId = prePayid;
req.nonceStr = nonce_str;
req.timeStamp = now;
req.package = package;
req.sign = sign;
[WXApi safeSendReq:req];
6.如果要在程序签名
//
// ViewController.m
// WxPay
//
// Created by apple on 15/6/9.
// Copyright (c) 2015年 tqh. All rights reserved.
//
#import "ViewController.h"
#import "payRequsestHandler.h"
#import "WXApi.h"
@interface ViewController () {
enum WXScene _scene;
NSString *Token;
long token_time;
}
@end
@implementation ViewController
- (instancetype)init
{
self = [super init];
if (self) {
_scene = WXSceneSession;
}
token_time = 0;
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
//向微信注册
//微信支付
UIButton *but2 = [[UIButton alloc]initWithFrame:CGRectMake(200, 100, 100, 40)];
[but2 setTitle:@"微信支付" forState:UIControlStateNormal];
but2.backgroundColor = [UIColor lightGrayColor];
[but2 addTarget:self action:@selector(wxpay) forControlEvents:UIControlEventTouchUpInside];
[but2 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[self.view addSubview:but2];
}
//微信支付
- (void)wxpay
{
//商户号
NSString *PARTNER_ID = @"1900000109";
//商户密钥
NSString *PARTNER_KEY = @"8934e7d15453e97507ef794cf7b0519d";
//APPID
NSString *APPI_ID = @"wxd930ea5d5a258f4f";
//appsecret
NSString *APP_SECRET = @"db426a9829e4b49a0dcac7b4162da6b6";
//支付密钥
NSString *APP_KEY = @"L8LrMqqeGRxST5reouB0K66CaYAWpqhAVsq7ggKkxHCOastWksvuX1uvmvQclxaHoYd3ElNBrNO2DHnnzgfVG9Qs473M3DTOZug5er46FhuGofumV8H2FVR9qkjSlC5K";
//支付结果回调页面
NSString *NOTIFY_URL = @"http://localhost/pay/wx/notify_url.asp";
//订单标题
NSString *ORDER_NAME = @"Ios客户端签名支付 测试";
//订单金额,单位（分）
NSString *ORDER_PRICE = @"1";
//创建支付签名对象
payRequsestHandler *req = [payRequsestHandler alloc];
//初始化支付签名对象
[req init:APPI_ID app_secret:APP_SECRET partner_key:PARTNER_KEY app_key:APP_KEY];
//判断Token过期时间，10分钟内不重复获取,测试帐号多个使用，可能造成其他地方获取后不能用，需要即时获取
time_t now;
time(&now);
//if ( (now - token_time) > 0 )//非测试帐号调试请启用该条件判断
{
//获取Token
Token = [req GetToken];
//设置Token有效期为10分钟
token_time = now + 600;
//日志输出
NSLog(@"获取Token： %@\n",[req getDebugifo]);
}
if ( Token != nil){
//================================
//预付单参数订单设置
//================================
NSMutableDictionary *packageParams = [NSMutableDictionary dictionary];
[packageParams setObject: @"WX" forKey:@"bank_type"];
[packageParams setObject: ORDER_NAME forKey:@"body"];
[packageParams setObject: @"1" forKey:@"fee_type"];
[packageParams setObject: @"UTF-8" forKey:@"input_charset"];
[packageParams setObject: NOTIFY_URL forKey:@"notify_url"];
[packageParams setObject: [NSString stringWithFormat:@"%ld",time(0)] forKey:@"out_trade_no"];
[packageParams setObject: PARTNER_ID forKey:@"partner"];
[packageParams setObject: @"196.168.1.1" forKey:@"spbill_create_ip"];
[packageParams setObject: ORDER_PRICE forKey:@"total_fee"];
NSString *package, *time_stamp, *nonce_str, *traceid;
//获取package包
package = [req genPackage:packageParams];
//输出debug info
NSString *debug = [req getDebugifo];
NSLog(@"gen package: %@\n",package);
NSLog(@"生成package: %@\n",debug);
//设置支付参数
time_stamp = [NSString stringWithFormat:@"%ld", now];
nonce_str = [TenpayUtil md5:time_stamp];
traceid = @"mytestid_001";
NSMutableDictionary *prePayParams = [NSMutableDictionary dictionary];
[prePayParams setObject: APPI_ID forKey:@"appid"];
[prePayParams setObject: APP_KEY forKey:@"appkey"];
[prePayParams setObject: nonce_str forKey:@"noncestr"];
[prePayParams setObject: package forKey:@"package"];
[prePayParams setObject: time_stamp forKey:@"timestamp"];
[prePayParams setObject: traceid forKey:@"traceid"];
//生成支付签名
NSString *sign;
sign = [req createSHA1Sign:prePayParams];
//增加非参与签名的额外参数
[prePayParams setObject: @"sha1" forKey:@"sign_method"];
[prePayParams setObject: sign forKey:@"app_signature"];
//获取prepayId
NSString *prePayid;
prePayid = [req sendPrepay:prePayParams];
//输出debug info
debug = [req getDebugifo];
NSLog(@"提交预付单： %@\n",debug);
if ( prePayid != nil) {
//重新按提交格式组包，微信客户端5.0.3以前版本只支持package=Sign=***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";
//签名参数列表
NSMutableDictionary *signParams = [NSMutableDictionary dictionary];
[signParams setObject: APPI_ID forKey:@"appid"];
[signParams setObject: APP_KEY forKey:@"appkey"];
[signParams setObject: nonce_str forKey:@"noncestr"];
[signParams setObject: package forKey:@"package"];
[signParams setObject: PARTNER_ID forKey:@"partnerid"];
[signParams setObject: time_stamp forKey:@"timestamp"];
[signParams setObject: prePayid forKey:@"prepayid"];
//生成签名
sign = [req createSHA1Sign:signParams];
//输出debug info
debug = [req getDebugifo];
NSLog(@"调起支付签名： %@\n",debug);
//调起微信支付
PayReq* req = [[PayReq alloc] init];
req.openID = APPI_ID;
req.partnerId = PARTNER_ID;
req.prepayId = prePayid;
req.nonceStr = nonce_str;
req.timeStamp = now;
req.package = package;
req.sign = sign;
[WXApi safeSendReq:req];
}else{
/*long errcode = [req getLasterrCode];
if ( errcode == 40001 )
{//Token实效，重新获取
Token = [req GetToken];
token_time = now + 600;
NSLog(@"获取Token： %@\n",[req getDebugifo]);
};*/
NSLog(@"获取prepayid失败\n");
[self alert:@"提示信息" msg:debug];
}
}else{
NSLog(@"获取Token失败\n");
[self alert:@"提示信息" msg:@"获取Token失败"];
}
}
//客户端提示信息
- (void)alert:(NSString *)title msg:(NSString *)msg
{
UIAlertView *alter = [[UIAlertView alloc] initWithTitle:title message:msg delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alter show];
}
//- (void)onReq:(BaseReq *)req {
// NSLog(@"qwe123");
//}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
DEMO下载地址：http://pan.baidu.com/s/1jGjCaJc
补：有些童鞋出现跳到微信支付又跳回来的情况一般是你集成了第三方分享功能需要进行一下判断
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation
上面方法里面进行是不是微信支付的判断
if ([url.host isEqualToString:@"pay"]) {
[WXApi handleOpenURL:url delegate:self];
}
return YES;