yichael_smartbow/Assets/BowArrow/Scripts/Manager/RoleMgr.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
/* 内置角色信息管理者，（PK模式用到的角色选择） */
public class RoleMgr
{
    static string[] roleNames = {"海绵宝宝", "方狗狗", "五六七", "CHANEL", "Mimi", "喵了个咪"};
    public static int roleCount {
        get {
            return roleNames.Length;
        }
    }
    //获取角色信息（适用于本地PK获取对手或者我的信息）
    public static string GetRoleInfo(int id, Image image)
    {   
        string nickname = null;
        if (IsRoleAvatar(id)) {
            nickname = roleNames[id - 1];
        } else {
            nickname = LoginMgr.myUserInfo.nickname;
        }
        SetAvatarToImage(image, id, LoginMgr.myUserInfo.avatarUrl);
        return nickname;
    }

    public static bool IsRoleAvatar(int id) {
        return id >= 1 && id <= 6;
    }
    public static int GetAvatarListLen() {
        return 7 + 24;
    }

    public const int NullAvatarID = int.MinValue;
    public static void SetAvatarToImage(Image image, int avatarID, string avatarUrl) {
        if (avatarID == NullAvatarID) image.sprite = null;
        else if (avatarID < 0) image.StartCoroutine(LoadAvatar(avatarUrl, image));
        else 
        {
            string path = "Textures/Avatar/";
            if (avatarID < 7) path += "Player" + avatarID;
            else path += avatarID - 7;
            image.sprite = Resources.Load<Sprite>(path);
        }
    }

    //缓存网络图片，避免重复加载
    private static Dictionary<string, Sprite> remoteAvatarMap = new Dictionary<string, Sprite>();
    private static IEnumerator LoadAvatar(string url, Image image)
    {
        if (string.IsNullOrWhiteSpace(url))
        {
            image.sprite = null;
            yield break;
        }
        if (remoteAvatarMap.ContainsKey(url))
        {
            image.sprite = remoteAvatarMap[url];
            yield break;
        }
        image.sprite = null;
        using (UnityWebRequest uwr = new UnityWebRequest(url, UnityWebRequest.kHttpVerbGET)) {
            uwr.downloadHandler = new DownloadHandlerTexture();
            yield return uwr.SendWebRequest();
            if (uwr.result != UnityWebRequest.Result.Success) yield break;
            Texture2D texture = DownloadHandlerTexture.GetContent(uwr);
            Sprite sprite = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), new Vector2(0.5f, 0.5f));
            remoteAvatarMap[url] = sprite;
            image.sprite = sprite;
        }
    }
}