【Unity3D】 Unity下载图片保存本地并加载

using UnityEngine;
using System.Collections;
using System.IO;
using System.Collections.Generic;
using System;
using UnityEngine.UI;

public class Test : MonoBehaviour {
    
    void Start()
    {
        print("当前文件路径:" + Application.persistentDataPath);
        //下载图片
        StartCoroutine(loadasset("http://127.0.0.1/1.jpg"));
        
    }
    //写入图片到本地
    IEnumerator loadasset(string url)
    {
        WWW w = new WWW(url);
        yield return w;
        if (w.isDone)
        {
            byte[] model = w.bytes;
            int length = model.Length;
            //写入图片到本地
            string[] urls = url.Split('/');
            print(urls[urls.Length - 1]);

            CreateObjFile(Application.persistentDataPath, urls[urls.Length - 1], model, length);
        }
    }

    void CreateObjFile(string path, string name, byte[] info, int length)
    {
        //文件流信息
        //StreamWriter sw;
        Stream sw;
        FileInfo t = new FileInfo(path + "//" + name);
        if (!t.Exists)
        {
            //如果此文件不存在则创建
            sw = t.Create();
        }
        else
        {
            //如果此文件存在则打开
            //sw = t.Append();
            return;
        }
        //以行的形式写入信息
        //sw.WriteLine(info);
        sw.Write(info, 0, length);
        //关闭流
        sw.Close();
        //销毁流
        sw.Dispose();
    }

    //读取图片文件
    IEnumerator LoadObjFromLocal(string path, string name)
    {
        string s = null;
    #if UNITY_ANDROID
           s = "jar:file://"+path+"/"+name;
    #elif UNITY_STANDALONE_WIN || UNITY_EDITOR
           s = "file://"+path+"/"+name;
    #endif
        WWW w = new WWW(s);
        yield return w;
        if (w.isDone)
        {
            this.GetComponent<Image>().sprite = Sprite.Create(w.texture, new Rect(0, 0, w.texture.width, w.texture.height), new Vector2(0.5f, 0.5f)); ;
        }
    }
    
    void OnGUI()
    {
        if (GUILayout.Button("加载图片"))
        {
            StartCoroutine(LoadObjFromLocal(Application.persistentDataPath, "1.jpg"));
        }
    }
    
}

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最后编辑：2018-12-12

作者：虚拟世界

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