项目中的一个需要导出windows平台的部分。需要增加一个ui，可以由用户从对话框中选择某种文件序列，返回这些文件的路径名称。
参考网址
-
[Unity 打开文件对话框批量选择文件](https://blog.csdn.net/weixin_39766005/article/details/103705178)
实现源码及注释
myOpenFile.cs
这个源文件用来与系统的OpenFileName建立联系，通过一个结构体来放置一些基础的变量
//created by Keenster 20200802
using UnityEngine;
using System.Collections;
using System;
using System.Runtime.InteropServices;
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
//如果这里写成class而不是struct，最后只能获得单文件，不能获得所有文件
//参考链接：https://blog.csdn.net/weixin_39766005/article/details/103705178
public struct OpenFileName
{
public int structSize;
public IntPtr dlgOwner;
public IntPtr instance;
public String filter;
public String customFilter;
public int maxCustFilter;
public int filterIndex;
public String file;
public int maxFile;
public String fileTitle;
public int maxFileTitle;
public String initialDir;
public String title;
public int flags;
public short fileOffset;
public short fileExtension;
public String defExt;
public IntPtr custData;
public IntPtr hook;
public String templateName;
public IntPtr reservedPtr;
public int reservedInt;
public int flagsEx;
}
public class LocalDialog
{
//链接指定系统函数 打开文件对话框
[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetOpenFileName([In, Out] OpenFileName ofn);
public static bool GetOFN([In, Out] OpenFileName ofn)
{
return GetOpenFileName(ofn);
}
//链接指定系统函数 另存为对话框
[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetSaveFileName([In, Out] OpenFileName ofn);
public static bool GetSFN([In, Out] OpenFileName ofn)
{
return GetSaveFileName(ofn);
}
}
myOpenFileTest.cs
使用OnGUI的绘制方式，在界面上增加一个按钮，初始化对话框功能
//created by Keenster 20200802
using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices;
using System;
using System.Text.RegularExpressions;
public class myOpenFileTest : MonoBehaviour
{
void OnGUI()
{
if (GUI.Button(new Rect(10, 10, 100, 50), "选择路径文件"))
{
OpenFileName openFileName = new OpenFileName();
openFileName.structSize = Marshal.SizeOf(openFileName);
openFileName.filter = "路径点文件(*.txt)\0*.txt";
openFileName.file = new string(new char[1024]);
openFileName.maxFile = openFileName.file.Length;
openFileName.fileTitle = new string(new char[64]);
openFileName.maxFileTitle = openFileName.fileTitle.Length;
openFileName.initialDir = Application.streamingAssetsPath.Replace('/', '\\');//默认路径
openFileName.title = "选择多个路径文件";
openFileName.defExt = "TXT";
//0x00080000 | == OFN_EXPLORER |对于旧风格对话框，目录 和文件字符串是被空格分隔的，函数为带有空格的文件名使用短文件名
openFileName.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008 ;
if (LocalDialog.GetOpenFileName(openFileName))
{
string[] SplitStr = { "\0" };
string[] strs = openFileName.file.Split(SplitStr, StringSplitOptions.RemoveEmptyEntries);
for (int i = 0; i < strs.Length; i++)
{
Debug.Log(strs[i]);
}
if (strs.Length > 0)
{
//DO SOMETHING
}
}
}
}
}
这里面需要注意的是，如果openFileName.flags取消选择0x00080000，默认为旧格式（但大家应该不会去用这个，太丑了），多选时分割方式与新格式的对话框是不一样的
本文方法分割出来的字符串，第一个元素是文件夹名，后面各个元素是纯文件名，中间全部用NULL字符串分割，将他们分离时使用”\0”作为分隔字符。