iOS微信第三方登录实例

本文实例为大家分享了iOS微信第三方登录，供大家参考，具体内容如下

一、准备工作
1、到微信开放平台注册成开发者，获取appid
2、导入WeChatConnection.framework
3、配置URL Schemes  输入appid  例如wx29ce0f21ea982cb8

二、配置AppDelegate.m

1、 注册微信

//微信登陆
[WXApi registerApp:WeiXin_AppId withDescription:@"weixin"];

2、设置函数

//把代理设置到登陆视图中
- (BOOL)application:(UIApplication *)application
   handleOpenURL:(NSURL *)url
{
  return [WXApi handleOpenURL:url delegate:[LoginViewController shareLogin]];
}

- (BOOL)application:(UIApplication *)application
      openURL:(NSURL *)url
 sourceApplication:(NSString *)sourceApplication
     annotation:(id)annotation
{
  return [WXApi handleOpenURL:url delegate:[LoginViewController shareLogin]];
}

三、登陆页代码

1、微信登录授权比较复杂，相比QQ，新浪多了几步，简单说就是需要三步，第一步，获取code，这个用来获取token，第二步，就是带上code获取token，第三步，根据第二步获取的token和openid来获取用户的相关信息

2、

第一步：获取code

-(void)weiXinLogin
{
  SendAuthReq* req =[[SendAuthReq alloc] init];
  req.scope = @"snsapi_userinfo,snsapi_base";
  req.state = @"0744" ;
  [WXApi sendReq:req];
} 

-(void)onReq:(BaseReq *)req
{
  NSLog(@"呵呵");
  [self msgHint:@"登陆失败"];
} 

-(void)onResp:(BaseResp *)resp
{
  SendAuthResp* sender = (SendAuthResp*)resp;
  NSString* code = sender.code;
  NSLog(@"啦啦 code = %@",code); 

  MBProgressHUD * hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
  hud.labelText = @"收取用户信息..";
  [self getAccess_tokenWithCode:code];
}

第二步 获取token

-(void)getAccess_tokenWithCode:(NSString*)myCode
{
  //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,myCode]; 

  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];
        NSString* token = [dic objectForKey:@"access_token"];
        NSString* openid = [dic objectForKey:@"openid"];
        [self getUserInfoWithToken:token openId:openid];
        NSLog(@"token = %@",token);
        NSLog(@"openid = %@",openid); 

      }
    });
  });
}

第三步：获取用户信息

-(void)getUserInfoWithToken:(NSString*)myToken openId:(NSString*)myOpenId
{
  // 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=%@",myToken,myOpenId];
  NSLog(@"infoUrl = %@",url);
  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];
        NSString* nickName = [dic objectForKey:@"nickname"];
        NSString* wxHeadImgUrl = [dic objectForKey:@"headimgurl"]; 

        NSLog(@"nickName = %@",nickName);
        NSLog(@"headImg = %@",wxHeadImgUrl); 

        NSUserDefaults *userDefaults = [NSUserDefaults standardUserDefaults];
        [userDefaults setObject:ON forKey:LogState];
        [userDefaults setObject:ThirdFoudationLogin forKey:LogType];
        [userDefaults setObject:nickName forKey:LoginName];
        [userDefaults setObject:wxHeadImgUrl forKey:UserHeaderPath];
        [userDefaults synchronize]; 

        [MBProgressHUD hideAllHUDsForView:self.view animated:YES];
        [self msgHint:@"微信登陆成功"];
        [self popView];
      }
    }); 

  });
}

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