Social API

Social API 是 Unity 访问如下社交功能的关键点：

• 用户个人资料
• 好友列表
• 成就
• 统计信息/排行榜

此 API 为不同的社交后端（例如 __GameCenter__）提供了统一的接口，主要供程序员在游戏项目中使用。

Social API 主要是一个异步 API，典型的用法是进行函数调用并该函数完成时注册回调。异步函数可能具有副作用，例如在 API 中填充某些状态变量，并且回调可能包含要处理的服务器数据。

Social 类位于 UnityEngine 命名空间中，因此该类始终可用，但其他 Social API 类保存在它们自己的命名空间 (UnityEngine.SocialPlatforms) 中。此外，Social API 的实现位于子命名空间（如 SocialPlatforms.GameCenter）中。

Here is an example of how to use the Social API:

using UnityEngine;
using UnityEngine.SocialPlatforms;

public class SocialExample : MonoBehaviour {

    void Start () {
        // Authenticate and register a ProcessAuthentication callback
        // This call needs to be made before we can proceed to other calls in the Social API
        Social.localUser.Authenticate (ProcessAuthentication);
    }

    // This function gets called when Authenticate completes
    // Note that if the operation is successful, Social.localUser will contain data from the server.
    void ProcessAuthentication (bool success) {
        if (success) {
            Debug.Log ("Authenticated, checking achievements");

            // Request loaded achievements, and register a callback for processing them
            Social.LoadAchievements (ProcessLoadedAchievements);
        }
        else
            Debug.Log ("Failed to authenticate");
    }

    // This function gets called when the LoadAchievement call completes
    void ProcessLoadedAchievements (IAchievement[] achievements) {
        if (achievements.Length == 0)
            Debug.Log ("Error: no achievements found");
        else
            Debug.Log ("Got " + achievements.Length + " achievements");

        // You can also call into the functions like this
        Social.ReportProgress ("Achievement01", 100.0, result => {
            if (result)
                Debug.Log ("Successfully reported achievement progress");
            else
                Debug.Log ("Failed to report achievement");
        });
    }
}

For more info on the Social API, see Social API Scripting Reference