Unity打开电脑本地文件夹选择图片替换
创建工程添加对应的UI如图所示
创建ChangeImage脚本来监听按钮事件
/****************************************************
文件:ChangeImage.cs
作者:Mark
日期:#CreateTime#
功能:用于替换图片
*****************************************************/
using System;
using System.Collections;
using System.Runtime.InteropServices;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.UI;
public class ChangeImage : MonoBehaviour
{
public Image currentImage;//当前图片
public Button selectBtn;//选择图片的按钮
private void Start()
{
selectBtn.onClick.AddListener(OnSelectBtnOnclick);//监听按是否被按下,按下则执行括号中的方法
}
//当按钮被按下时执行该脚本,打开本地文件夹
private void OnSelectBtnOnclick()
{
OpenFileName ofn = new OpenFileName();
ofn.structSize = Marshal.SizeOf(ofn);
//可进行修改选择的文件类型
ofn.filter = "图片文件(*.jpg*.png)\0*.jpg;*.png";
ofn.file = new string(new char[256]);
ofn.maxFile = ofn.file.Length;
ofn.fileTitle = new string(new char[64]);
ofn.maxFileTitle = ofn.fileTitle.Length;
string path = Application.streamingAssetsPath;
path = path.Replace('/', '\\');
//默认路径
ofn.initialDir = path;
ofn.title = "选择需要替换的图片";
ofn.defExt = "JPG";//显示文件的类型
//注意 一下项目不一定要全选 但是0x00000008项不要缺少
ofn.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;//OFN_EXPLORER|OFN_FILEMUSTEXIST|OFN_PATHMUSTEXIST| OFN_ALLOWMULTISELECT|OFN_NOCHANGEDIR
if (WindowDll.GetOpenFileName(ofn))
{
StartCoroutine(LoadTextrue(ofn.file));
}
}
//加载选择的图片并进行替换 IEnumerator LoadTextrue(string path)
{
UnityWebRequest unityWebRequest = new UnityWebRequest("file:///" + path);
DownloadHandlerTexture handlerTexture = new DownloadHandlerTexture(true);
unityWebRequest.downloadHandler = handlerTexture;
yield return unityWebRequest.SendWebRequest();
if (unityWebRequest.isNetworkError || unityWebRequest.isHttpError)
{
print(unityWebRequest.error);
}
else
{
Texture2D t = handlerTexture.texture;
//将选择的图片替换上去
currentImage.sprite = Sprite.Create(t, new Rect(0, 0, t.width, t.height), Vector2.one);
}
}
}
其中OpenFileName 的类为打开windows文件夹的类 不需要任何操作 复制即用
创建OpenFileName脚本
/****************************************************
文件:OpenFileName.cs
作者:Mark
日期:#CreateTime#
功能:打开文件夹
*****************************************************/
using System;
using System.Runtime.InteropServices;
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class OpenFileName
{
public int structSize = 0;
public IntPtr dlgOwner = IntPtr.Zero;
public IntPtr instance = IntPtr.Zero;
public String filter = null;
public String customFilter = null;
public int maxCustFilter = 0;
public int filterIndex = 0;
public String file = null;
public int maxFile = 0;
public String fileTitle = null;
public int maxFileTitle = 0;
public String initialDir = null;
public String title = null;
public int flags = 0;
public short fileOffset = 0;
public short fileExtension = 0;
public String defExt = null;
public IntPtr custData = IntPtr.Zero;
public IntPtr hook = IntPtr.Zero;
public String templateName = null;
public IntPtr reservedPtr = IntPtr.Zero;
public int reservedInt = 0;
public int flagsEx = 0;
}
public class WindowDll
{
[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
public static bool GetOpenFileName1([In, Out] OpenFileName ofn)
{
return GetOpenFileName(ofn);
}
}