获取OpenId等信息

<p><strong>简要描述：</strong></p> <ul> <li>入口类为VTMediator ,可以获取openId，deviceId，device型号，家长端url，</li> </ul> <h5>1. 获取设备ID</h5> <p><strong>接口名称</strong></p> <ul> <li><code>+(NSString *)getDeviceId</code></li> </ul> <h5>2. 获取设备型号</h5> <p><strong>接口名称</strong></p> <ul> <li><code>+(NSString *)getDeviceModel</code></li> </ul> <h5>3. 获取openID</h5> <p><code>@property (nonatomic, strong) NSString *openId</code></p> <h5>4. 获取huibenUrl</h5> <p><code>@property (nonatomic, strong) NSString *huibenUrl</code></p>