[unity3d]下載網(wǎng)上的圖片并保存到本地

下面介紹一個(gè)下載一個(gè)網(wǎng)絡(luò)資源保存到本地的例子，正好是現(xiàn)在項(xiàng)目中的需求。

using UnityEngine; using System.Collections; using System.IO;  public class Download : MonoBehaviour  { 	public string url = "http://ww3.sinaimg.cn/large/80dfe250jw1dle1r2v4t9j.jpg"; 	public GUIText Test; 	WWW www; 	Color Alpha; 	bool Appear = false; 	int a = 0; 	 	IEnumerator Start()  	{ 		www = new WWW(url); 		//定義www為WWW類型并且等于所下載下來的WWW中內(nèi)容。 		yield return www; 		//返回所下載的www的值 		renderer.material.shader = Shader.Find("Transparent/Diffuse"); 		renderer.material.mainTexture = www.texture; 		 		Texture2D newTexture = www.texture; 		byte[] pngData = newTexture.EncodeToPNG(); 		try 		{ 			if (Application.platform == RuntimePlatform.Android) 			{ 				File.WriteAllBytes(Application.persistentDataPath + "/ICO.png", pngData); 				 			} 			else 			{ 				//File.WriteAllBytes(Application.dataPath + "/download/ICO.png", pngData); 				File.WriteAllBytes(Application.dataPath + "/ICO.png", pngData); 			} 		} 		catch(IOException e) 		{ 			print(e); 		} 		 		Alpha = renderer.material.color; 		Alpha.a = 0; 		Appear = true; 		renderer.enabled = true; 		renderer.material.color = Alpha; 		//將下載下來的WWW中的圖片賦予到默認(rèn)物體的材質(zhì)上進(jìn)行渲染出來 	} 	 	void Update() 	{ 		Test.text = "DownLoad: " + www.progress; 		if(www.progress == 1 && Appear)	 		{ 			a++; 			Alpha = renderer.material.color; 			Alpha.a += 0.01F; 			renderer.material.color = Alpha; 		} 		 		if(Input.GetKey(KeyCode.Escape))            {                Application.Quit();            }    	} 	 	void OnGUI()         {            if(GUI.Button(new Rect(Screen.width-120,Screen.height-40,120,30),"Click to XIAOWEI!"))             {                Application.OpenURL("https://cache.yisu.com/upload/information/20200217/48/4473.jpg的，后來就多出來了，這就達(dá)到預(yù)想的效果！