PlatMsgManager

给PlatMsgManager添加QQAuthorValid和GetQQSession方法，用来调用安卓底层对应的方法，从而验证、刷新和获取QQ票据。然后添加几个用于QQ和微信登录和注销的const值，最后添加用于转换底层json消息的PlatformMsg类

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    //发送消息到平台底层
    public const int PLATFORM_MSG_QQLOGIN = 1;//QQ登录
    public const int PLATFORM_MSG_QQLOGOUT = 2;//QQ注销
    public const int PLATFORM_MSG_WXLOGIN = 3;//WX注销
    public const int PLATFORM_MSG_WXLOGOUT = 4;//WX注销


//从底层获取string
public const int UNITY_GET_STRING_QQAUTHORVALID = 1;//QQ票据是否有效
    public const int UNITY_GET_STRING_QQREFRESHSESSION = 2;//QQ刷新票据

    /// <summary>
    /// QQ授权是否有效
    /// </summary>
    /// <returns>是否有效</returns>
    public bool QQAuthorValid()
    {
        return System.Convert.ToBoolean(GetStringFromPlatform(UNITY_GET_STRING_QQAUTHORVALID));
    }
    /// <summary>
    /// 刷新获取票据
    /// </summary>
    /// <returns>返回的用户QQ信息</returns>
    public string GetQQSession()
    {
        string qqData = GetStringFromPlatform(UNITY_GET_STRING_QQREFRESHSESSION);
        return qqData;
    }

public class PlatformMsg
{
    public string openid;
    public string token;
    public string unionid;
    public string refreshtoken;
    public string expires;
    public string paytoken;
    public string pf;
    public string pfkey;
    public string expirestime;
}

PhoneManager

在Assets——Scripts——Manager内新建PhoneManager，我们在这个类里维护登录状态，并且对接游戏内登录相关的UI。

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using UnityEngine;
using Newtonsoft.Json;
public enum PlatformEnum
{
    None,
    QQ = 1,
    WX = 2
}

public class PhoneManager : SingletonPattern<PhoneManager> 
{
    public bool IsLogin { get; set; } = false;
    public PlatformEnum CurrentPlatform { get; set; } = PlatformEnum.None;
    public System.Action<PlatformEnum> LoginSuccess;
    public System.Action<PlatformEnum> LoginFailure;
    public System.Action<PlatformEnum> LoginCancel;

    /// <summary>
    /// 登录回调
    /// </summary>
    /// <param name="data">数据</param>
    /// <param name="plat">平台类型</param>
    /// <param name="result">登录结果 0 == 成功，1 == 失败， 2 == 取消</param>
    public void LoginCallback(string data, PlatformEnum plat, int result = 0)
    {
        switch (result)
        {
            case 0:
                {
                    Debug.Log("票据获取：" + data);
                    var platMsg = JsonConvert.DeserializeObject<PlatformMsg>(data);
                    string openid = platMsg.openid;
                    string unionid = platMsg.unionid;
                    string token = platMsg.token;
                    IsLogin = true;
                    CurrentPlatform = plat;
                    if (LoginSuccess != null)
                    {
                        LoginSuccess.Invoke(plat);
                    }
                    PlayerPrefs.SetString("Login",plat.ToString());
					PlayerPrefs.Save();
                    break;
                }
            case 1:
                if (LoginFailure != null)
                {
                    LoginFailure.Invoke(plat);
                }
                break;
            case 2:
                if (LoginCancel != null)
                {
                    LoginCancel.Invoke(plat);
                }
                break;
        }
    }
    /// <summary>
    /// 登录
    /// </summary>
    /// <param name="platform">平台</param>
    public void Login(PlatformEnum platform)
    {
        if(platform  == PlatformEnum.QQ)
        {
            PlatMsgManager.Instance.SendUnityMessageToPlatform(PlatMsgManager.PLATFORM_MSG_QQLOGIN);
        }
        else if (platform == PlatformEnum.WX)
        {
            PlatMsgManager.Instance.SendUnityMessageToPlatform(PlatMsgManager.PLATFORM_MSG_WXLOGIN);
        }
    }
    /// <summary>
    /// 自动登录
    /// </summary>
    public void AutoLogin()
{
#if !UNITY_EDITOR
    if (PlayerPrefs.HasKey("Login"))
    {
        PlatformEnum plat = (PlatformEnum)Enum.Parse(typeof(PlatformEnum),PlayerPrefs.GetString("Login"));
        if (plat == PlatformEnum.QQ)
        {
            if (PlatMsgManager.Instance.QQAuthorValid())
            {
                string qqData = PlatMsgManager.Instance.GetQQSession();
                LoginCallback(qqData, PlatformEnum.QQ);
            }
        }
        else if (plat == PlatformEnum.WX)
        {
            if (PlatMsgManager.Instance.WXAuthorValid())
            {
                string wxData = PlatMsgManager.Instance.GetWXSession();
                LoginCallback(wxData, PlatformEnum.WX);
            }
        }
    }
    else
    {
        if (PlatMsgManager.Instance.QQAuthorValid())
        {
            string qqData = PlatMsgManager.Instance.GetQQSession();
            LoginCallback(qqData, PlatformEnum.QQ);
        }
        else if (PlatMsgManager.Instance.WXAuthorValid())
        {
            string wxData = PlatMsgManager.Instance.GetWXSession();
            LoginCallback(wxData, PlatformEnum.WX);
        }

    }
#endif
}
    public void Logout()
    {
        switch(CurrentPlatform)
        {
            case PlatformEnum.QQ:
                PlatMsgManager.Instance.SendUnityMessageToPlatform(PlatMsgManager.PLATFORM_MSG_QQLOGOUT); break;
            case PlatformEnum.WX:
                PlatMsgManager.Instance.SendUnityMessageToPlatform(PlatMsgManager.PLATFORM_MSG_WXLOGOUT); break;
        }
    }
}

修改PlatformScript，在其中获得底层的消息后调用回调方法

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private void Update()
{
    while (msgQueue.Count > 0)
    {
        PlatformMsg msg = msgQueue.Dequeue();
        switch (msg.iMsgId)
        {
            case PLATFORM_MSG_QQLOGINCALLBACK:
                PhoneManager.Instance.LoginCallback(msg.strParam1, PlatformEnum.QQ, msg.iParam1);//+++
                break;
            case PLATFORM_MSG_WXLOGINCALLBACK:
                break;
            default:
                break;
        }
    }
}

登录界面

具体登录界面的设计略，主要是放了QQ、微信登录两个按钮和登出一个按钮。

我们看一下界面的逻辑，我们在Scripts——UGUI——Window中添加LoginWnd文件

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using UnityEngine;

public class LoginWnd : WindowBase
{
    //private LoginPanel m_LoginPanel; 
    public override void OnAwake(object param1 = null, object param2 = null, object param3 = null)
    {
        //m_LoginPanel = GameObject.GetComponent<LoginPanel>();
#if UNITY_ANDROID || UNITY_IOS
        PhoneManager.Instance.LoginSuccess += LoginSuccess;
        PhoneManager.Instance.LoginFailure += LoginFailure;
        PhoneManager.Instance.LoginCancel += LoginCancel;

        if (!PhoneManager.Instance.IsLogin)//尝试自动登录
        {
            PhoneManager.Instance.AutoLogin();
        }

        //伪代码：登录按钮添加监听
        //AddButtonClickListener(m_LoginPanel.m_QQLoginBtn,OnClickQQ);
        //AddButtonClickListener(m_LoginPanel.m_WXLoginBtn,OnClickWX);
        //AddButtonClickListener(m_LoginPanel.m_LogoutBtn,OnClickLogout);
#endif
    }
    public override void OnClose()
    {
        PhoneManager.Instance.LoginSuccess -= LoginSuccess;
        PhoneManager.Instance.LoginFailure -= LoginFailure;
        PhoneManager.Instance.LoginCancel -= LoginCancel;
    }
    void LoginSuccess(PlatformEnum platform)
    {
        if(platform == PlatformEnum.QQ)
        {
            Debug.Log("QQ登录成功");//游戏弹出窗口
            //（伪代码）关闭各个平台的登录按钮
            //（伪代码）显示登出按钮
        }
        else if(platform == PlatformEnum.WX)
        {
            Debug.Log("WX登录成功");//游戏弹出窗口
            //（伪代码）关闭各个平台的登录按钮
            //（伪代码）显示登出按钮
        }
    }
    public void LoginFailure(PlatformEnum platform)
    {
        Debug.Log("登录失败");//游戏弹出窗口
    }
    void LoginCancel(PlatformEnum platform)
    {
        Debug.Log("取消登录");//游戏弹出窗口
    }
    void OnClickQQ()
    {
        PhoneManager.Instance.Login(PlatformEnum.QQ);
    }
    void OnClickWX()
    {
        PhoneManager.Instance.Login(PlatformEnum.WX);
    }
    void OnClickLogout()
    {
        PhoneManager.Instance.Logout();
        //（伪代码）打开各个平台的登录按钮
        //（伪代码）隐藏登出按钮
    }
}

注意，我们这里在OnClickLogout使用伪代码进行登录按钮的还原，更推荐写在LoginCancel里