微信授权登录

http://www.mincoder.com/article/2115.shtml

1、可以到微信开发平台注册相关的APP，等待审核成功后可获得对应的key和secret，获取成功后需要单独申请开通登录和支付接口，如图所示：

2、和QQ比较类似，需要填写Url Schemes，如demo中的wxd930ea5d5a258f4f ，然后引入相应framework。

3、在AppDelegate中注册和实现授权后的回调函数，代码如下：

 //向微信注册 [WXApi registerApp:kWXAPP_ID withDescription:@"weixin"]; //授权后回调 WXApiDelegate -(void)onResp:(BaseReq *)resp { /* ErrCode ERR_OK = 0(用户同意) ERR_AUTH_DENIED = -4（用户拒绝授权） ERR_USER_CANCEL = -2（用户取消） code 用户换取access_token的code，仅在ErrCode为0时有效 state 第三方程序发送时用来标识其请求的唯一性的标志，由第三方程序调用sendReq时传入，由微信终端回传，state字符串长度不能超过1K lang 微信客户端当前语言 country 微信用户当前国家信息 */ SendAuthResp *aresp = (SendAuthResp *)resp; if (aresp.errCode== 0) { NSString *code = aresp.code; NSDictionary *dic = @{@"code":code}; } } //和QQ,新浪并列回调句柄 - (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { return [TencentOAuth HandleOpenURL:url] || [WeiboSDK handleOpenURL:url delegate:self] || [WXApi handleOpenURL:url delegate:self];; } - (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url { return [TencentOAuth HandleOpenURL:url] || [WeiboSDK handleOpenURL:url delegate:self] || [WXApi handleOpenURL:url delegate:self];; } 4、第一步：获取code，这个用来获取token  - (IBAction)weixinLogin:(id)sender { [self sendAuthRequest]; } -(void)sendAuthRequest { SendAuthReq* req =[[SendAuthReq alloc ] init]; req.scope = @"snsapi_userinfo,snsapi_base"; req.state = @"0744" ; [WXApi sendReq:req]; } 这里获取后会调用之前在AppDelegate里面对应的oauthResp回调，获得得到的code。  第二步：带上code获取token    -(void)getAccess_token { //https://api.weixin.qq.com/sns/oauth2/access_token?appid=APPID&secret=SECRET&code=CODE&grant_type=authorization_code NSString *url =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/oauth2/access_token?appid=%@&secret=%@&code=%@&grant_type=authorization_code",kWXAPP_ID,kWXAPP_SECRET,self.wxCode.text]; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ NSURL *zoneUrl = [NSURL URLWithString:url]; NSString *zoneStr = [NSString stringWithContentsOfURL:zoneUrl encoding:NSUTF8StringEncoding error:nil]; NSData *data = [zoneStr dataUsingEncoding:NSUTF8StringEncoding]; dispatch_async(dispatch_get_main_queue(), ^{ if (data) { NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil]; /* { "access_token" = "OezXcEiiBSKSxW0eoylIeJDUKD6z6dmr42JANLPjNN7Kaf3e4GZ2OncrCfiKnGWiusJMZwzQU8kXcnT1hNs_ykAFDfDEuNp6waj-bDdepEzooL_k1vb7EQzhP8plTbD0AgR8zCRi1It3eNS7yRyd5A"; "expires_in" = 7200; openid = oyAaTjsDx7pl4Q42O3sDzDtA7gZs; "refresh_token" = "OezXcEiiBSKSxW0eoylIeJDUKD6z6dmr42JANLPjNN7Kaf3e4GZ2OncrCfiKnGWi2ZzH_XfVVxZbmha9oSFnKAhFsS0iyARkXCa7zPu4MqVRdwyb8J16V8cWw7oNIff0l-5F-4-GJwD8MopmjHXKiA"; scope = "snsapi_userinfo,snsapi_base"; } */ self.access_token.text = [dic objectForKey:@"access_token"]; self.openid.text = [dic objectForKey:@"openid"]; } }); }); } 利用GCD来获取对应的token和openID。  第三步：根据第二步获取的token和openid获取用户的相关信息。    -(void)getUserInfo { // https://api.weixin.qq.com/sns/userinfo?access_token=ACCESS_TOKEN&openid=OPENID NSString *url =[NSString stringWithFormat:@"https://api.weixin.qq.com/sns/userinfo?access_token=%@&openid=%@",self.access_token.text,self.openid.text]; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ NSURL *zoneUrl = [NSURL URLWithString:url]; NSString *zoneStr = [NSString stringWithContentsOfURL:zoneUrl encoding:NSUTF8StringEncoding error:nil]; NSData *data = [zoneStr dataUsingEncoding:NSUTF8StringEncoding]; dispatch_async(dispatch_get_main_queue(), ^{ if (data) { NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil]; /* { city = Haidian; country = CN; headimgurl = "http://wx.qlogo.cn/mmopen/FrdAUicrPIibcpGzxuD0kjfnvc2klwzQ62a1brlWq1sjNfWREia6W8Cf8kNCbErowsSUcGSIltXTqrhQgPEibYakpl5EokGMibMPU/0"; language = "zh_CN"; nickname = "xxx"; openid = oyAaTjsDx7pl4xxxxxxx; privilege = ( ); province = Beijing; sex = 1; unionid = oyAaTjsxxxxxxQ42O3xxxxxxs; } */ self.nickname.text = [dic objectForKey:@"nickname"]; self.wxHeadImg.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[dic objectForKey:@"headimgurl"]]]]; } }); }); }