获取main类，跳转

NSMutableDictionary* dic=[NSMutableDictionary dictionaryWithContentsOfFile:FILE_PATH(@"LoginData.plist")];

        [dic removeAllObjects];

        [dic writeToFile:FILE_PATH(@"LoginData.plist") atomically:YES];

        [[CheckUserData shareInstance] setIsLogin:NO];

        BaseTabBarViewController* tabbar=[[UIStoryboard storyboardWithName:@"Main" bundle:[NSBundle mainBundle]]instantiateViewControllerWithIdentifier:@"tabbar"];

        [self presentViewController:tabbar animated:NO completion:nil];