在工作中经常会需要下载网络图片，或者音频等功能，所以封装了这个下载脚本。
功能需求：为了高效率和节省流量，再本地有该文件时不再重复下载
可以回传下载进度，下载后的资源
调用方式简单
用来下载的脚本
using UnityEngine;
using System.Collections;
using System.IO;
using System;
using UnityEngine.Networking;
///
/// 图片缓存
///
public class WebUtils : SingletonObject
{
///
/// 下载带泛型
///
public void Load(string url , Action endAction=null, Action proAction=null) where T: UnityEngine.Object
{
if (!string.IsNullOrEmpty(url))
{
string path = PathTools.GetSavePath(url);
if (!File.Exists(path))
{
StartCoroutine(DownLoadByUnityWebRequest(url, endAction, proAction));
}
else//已在本地缓存
{
StartCoroutine(DownLoadByUnityWebRequest(path, endAction, proAction));
}
}
else
{
Debug.LogError("WebUtils error: url is null!");
}
}
///
/// UnityWebRequest下载
///
/// (string url, Action callback = null,Action proAction=null) where T : UnityEngine.Object
{
UnityWebRequest uwr = new UnityWebRequest(url);
if (typeof(T) == typeof(AudioClip))
{
string _suf = PathTools.GetSuffix(url);
AudioType at = AudioType.MPEG;
if (_suf.Contains("ogg"))
at = AudioType.OGGVORBIS;
DownloadHandlerAudioClip downloadAudioClip = new DownloadHandlerAudioClip(url, at);
uwr.downloadHandler = downloadAudioClip;
}
if (typeof(T) == typeof(Sprite)|| typeof(T) == typeof(Texture2D))
{
DownloadHandlerTexture downloadTexture = new DownloadHandlerTexture(true);
uwr.downloadHandler = downloadTexture;
}
uwr.SendWebRequest();
while (true)
{
if (uwr.isNetworkError || uwr.isHttpError)
break;
if (uwr.isDone || uwr.downloadProgress >= 1)
{
proAction?.Invoke(1);
break;
}
else
proAction?.Invoke(uwr.downloadProgress);
}
yield return uwr;
if (!uwr.isNetworkError && !uwr.isHttpError)
{
if (typeof(T) == typeof(AudioClip))
{
AudioClip audioClip = ((DownloadHandlerAudioClip)uwr.downloadHandler).audioClip;
callback.Invoke((T)(UnityEngine.Object)audioClip);
}
if (typeof(T) == typeof(Sprite))
{
Texture2D texture = ((DownloadHandlerTexture)uwr.downloadHandler).texture;
Sprite sp = Sprite.Create(texture, new Rect(0, 0, texture.width, texture.height), Vector2.one * 0.5f);
callback?.Invoke((T)(UnityEngine.Object)sp);
}
if (typeof(T) == typeof(Texture2D))
{
Texture2D texture1 = ((DownloadHandlerTexture)uwr.downloadHandler).texture;
callback?.Invoke((T)(UnityEngine.Object)texture1);
}
//保存到本地
if (url.Substring(0, 4) == "http")
{
File.WriteAllBytes(PathTools.GetSavePath(url), uwr.downloadHandler.data);
}
}
else
{
Debug.LogError("DownLoadByUnityWebRequest error:"+ uwr.error +" url:"+url);
}
}
///
/// 下载文件
///
public void LoadFile(string url,string _suffix="", Action endAction = null, Action proAction = null)
{
if (!string.IsNullOrEmpty(url+_suffix))
{
string path = PathTools.GetSavePath(url+_suffix);
if (!File.Exists(path))
{
StartCoroutine(DownLoadFileByUnityWebRequest(url, _suffix, endAction, proAction));
}
else//已在本地缓存
{
StartCoroutine(DownLoadFileByUnityWebRequest(path, _suffix, endAction, proAction));
}
}
else
{
Debug.LogError("WebUtils error: url is null!");
}
}
private IEnumerator DownLoadFileByUnityWebRequest(string url, string _suffix = "", Action callback = null, Action proAction = null)
{
UnityWebRequest uwr = UnityWebRequest.Get(url);
uwr.SendWebRequest();
while (true)
{
if (uwr.isNetworkError || uwr.isHttpError)
break;
if (uwr.isDone || uwr.downloadProgress >= 1)
{
proAction?.Invoke(1);
break;
}
else
proAction?.Invoke(uwr.downloadProgress);
}
yield return uwr;
if (uwr.isNetworkError || uwr.isHttpError)
{
Debug.LogError("DownLoadByUnityWebRequest error:" + uwr.error + " url:" + url);
}
else
{
callback?.Invoke(uwr.downloadHandler.text.ToString());
//保存到本地
if (url.Substring(0, 4) == "http")
{
File.WriteAllBytes(PathTools.GetSavePath(url + _suffix), uwr.downloadHandler.data);
}
}
}
}
路径工具脚本
using System.IO;
using UnityEngine;
///
/// 路径工具
///
public class PathTools
{
///
/// StreamPath路径
///
public static string StreamPath
{
get
{
return Application.streamingAssetsPath + "/Cache";
}
}
///
/// 缓存路径
///
public static string persistentPath
{
get
{
return Application.persistentDataPath + "/WebCache";
}
}
static string[] sufTypes = { "png","jpg","apk","mp3","ogg","txt","json"};
///
/// 获取资源的保存路径
///
public static string GetSavePath(string url)
{
string _suffix = GetSuffix(url);
string _name = "{0}." + _suffix;
string path = Path.Combine(persistentPath, _suffix);
CreatePath(path);
path = Path.Combine(path, string.Format(_name, GetFileName(url)/*url.GetHashCode()*/)); ;
return path;
}
///
/// 解析后缀名
///
public static string GetFileName(string url)
{
string[] subArr = url.Split('.');
string totalStr = subArr[subArr.Length - 2];
string [] subArr1 = totalStr.Split('/');
return subArr1[subArr1.Length-1];
}
///
/// 解析后缀名
///
public static string GetSuffix(string url)
{
string[] subArr = url.Split('.');
string _suffix = subArr[subArr.Length - 1];
for (int i = 0; i < sufTypes.Length; i++)
{
if (_suffix.Contains(sufTypes[i]))
{
_suffix = sufTypes[i];
break;
}
}
return _suffix;
}
///
/// 获取资源的加载路径
///
public static string GetLoadPath(string url)
{
return "file:///" + GetSavePath(url);
}
///
/// 创建路径
///
static void CreatePath(string path)
{
if (!Directory.Exists(path))
{
Directory.CreateDirectory(path);
}
}
///
/// 获取资源保存路径，打包时保存路径
///
public static string GetAssetOutPath(int target)
{
string path = "";
switch (target)
{
case 5://win
path = StreamPath + "/Android/";
break;
case 9://ios
path = StreamPath + "/IOS/";
break;
case 13://android
path = StreamPath + "/Android/";
break;
}
return path;
}
///
/// 不同平台下StreamingAssets的路径
///
public static readonly string dataPath =
#if UNITY_ANDROID && !UNITY_EDITOR
"jar:file://" + Application.dataPath + "!/assets/";
#elif UNITY_IOS && !UNITY_EDITOR
"file://" + Application.dataPath + "/Raw/";
#elif UNITY_STANDALONE_WIN
"file://" + Application.dataPath + "/StreamingAssets/";
#else
"file://" + Application.dataPath + "/StreamingAssets/";
#endif
///
/// 平台名称，下载时只区分安卓和ios，pc使用安卓的资源
///
public static readonly string platName =
#if UNITY_IOS
"IOS";
#else
"Android";
#endif
}
调用方式
WebUtils.Ins.Load(imgurl, (sp) =>
{
image.sprite = sp;
Debug.Log("下载结束");
}, (pro) =>
{
Debug.Log("进度：" + pro);
});
WebUtils.Ins.Load(audurl, (cp) =>
{
GetComponent().clip = cp;
GetComponent().Play();
Debug.Log("下载结束");
}, (pro) =>
{
Debug.Log("进度：" + pro);
});
WebUtils.Ins.LoadFile(apkurl, (str) => {
Debug.Log("下载结束:"+str);
}, (pro) => {
Debug.Log("进度：" + pro);
});
再封装一下
using UnityEngine;
using UnityEngine.UI;
///
/// 加载工具
///
public class LoadUtils
{
///
/// 通过图集设置图片
///
public static void SetChildImage(Image image, string url,string name)
{
Sprite[] sprs = Resources.LoadAll(url);
if (sprs != null && sprs.Length > 0)
{
foreach (var item in sprs)
{
if (item.name == name)
{
image.sprite = item;
}
}
}
else
{
Debug.LogError("SetChildImage url error:"+url);
}
}
///
/// 设置图片
///
/// 地址
/// 图片
/// Resource下路径 填空直接再Resource中加载
public static void SetImage(string url,Image image, string befor ="")
{
if (string.IsNullOrEmpty(url) || image == null)
{
return;
}
//网图
if (url.Substring(0, 4) == "http")
{
WebUtils.Ins.Load(url, (sp) =>
{
image.sprite = sp;
});
}
else //Resources加载
{
string[] strs = url.Split('.');
if (strs.Length > 1)
{
url = strs[0];
}
url = befor +"/"+ url;
Sprite spri = ResourceLoader.Ins.Load(url);
if (spri != null)
{
image.sprite = spri;
}
else
{
Debug.LogError("LoadUtils SetImage error: " + url);
}
}
}
///
/// 设置音频
///
public static void SetAudio(string url, AudioSource audio, string befor = "")
{
if (string.IsNullOrEmpty(url) || audio == null)
{
return;
}
if (url.Substring(0, 4) == "http")
{
WebUtils.Ins.Load(url, (clip) =>
{
audio.clip = clip;
audio.Play();
});
}
else
{
string[] strs = url.Split('.');
if (strs.Length > 1)
{
url = strs[0];
}
url = befor + url;
AudioClip clip = ResourceLoader.Ins.Load(url);
audio.clip = clip;
audio.Play();
}
}
}
调用
LoadUtils.SetImage("icon_chongwu_moren@2x", image, "Texture");
LoadUtils.SetAudio("2147463780", GetComponent());