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/登录过程
- (IBAction)logIn:(id)sender
{
    //1.确定地址url
    NSString *urlString =@"http://www.xxx.com/Api/user.php";
    NSURL *url =[NSURL URLWithString:urlString];
    
    
    //2.建立请求
    // 1.建立请求，是要修改请求，所以要用NSMutableURLReque
    
    NSMutableURLRequest *requestion =[NSMutableURLRequest requestWithURL:url];
    
    // 2.建立请求超时时间
    [requestion setTimeoutInterval:4.0];
    
    // 3.指定请求方法为POST方法，大小不分
    [requestion setHTTPMethod:@"post"];
    
    // 4.建立请求数据体,因为要发这个数据题传送给服务器
    
    NSLog(@"iphone=[%@]",logIphone.text);
    NSLog(@"itext=[%@]",logNum.text);
    

      NSString *strinhBody =[NSString stringWithFormat:@"auth=iorgane_cup&mobile=%@&password=%@&action=check_user_login&sign=yyyyyy",logIphone.text,logNum.text];
    
    //将生产的字符串转换成数据
    NSData *body =[strinhBody dataUsingEncoding:NSUTF8StringEncoding];
    //5把数据体设置给请求
    [requestion setHTTPBody:body];

    //登录：利用post(数据体：包含电话号码和验证码)，上传服务器，然后服务器回复状态
    
    NSURLResponse *response =nil;
    NSError *error=nil;
    
    NSData *data =[NSURLConnection sendSynchronousRequest:requestion returningResponse:&response error:&error];
    NSLog(@"访问完成");

    if(error !=nil)
    {
        NSLog(@"访问出错：%@",error.localizedDescription);
        return;
    }
    if (data !=nil)
    {
        NSString *string =[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
        NSLog(@"string=[%@]",string);
        NSMutableDictionary *array =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:nil];
        
        NSString *pathFile =[[NSBundle mainBundle]pathForResource:@"orange.plist" ofType:nil];
        [array writeToFile:pathFile atomically:YES];
        NSLog(@"%@",[array objectForKey:@"result"]);
        if (_logList ==nil)
        {
            _logList =[[NSMutableString alloc]init];
        }
        _logList =[array objectForKey:@"result"];
        NSLog(@"_logList=[%@]",_logList);
        if ([_logList isEqualToString:@"true"])
        {
            NSLog(@"登录成功");
        }
        else
        {
            NSLog(@"登录失败，请查看密码与用户名是否正确");
            return;
        }
        
    }
    else
    {
        NSLog(@"没有收到任何数据");
    }
    
}