在window平台下，我们需要打开或则保存一些东西到指定目录下

在window平台下3D动画2d素材，有时我们需要打开或则保存一些东西到指定目录下，这时我们不需要再重复造轮子，完全可以调用系统的文件窗口unity 打开文件对话框unity 打开文件对话框，具体的调用如下：

第一步：创建打开窗口和保存窗口的类。

using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices;
using System;
namespace Common
{
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public class FileDlg
    {
        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;
    }
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public class OpenFileDlg : FileDlg
    {
    }
    public class OpenFileDialog
    {
        [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
        public static extern bool GetOpenFileName([In, Out] OpenFileDlg ofd);
    }
    public class SaveFileDialog
    {
        [DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
        public static extern bool GetSaveFileName([In, Out] SaveFileDlg ofd);
    }
    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public class SaveFileDlg: FileDlg
    {
    }
}

第二步：调用刚才创建的类,使用事件系统绑定以下两个方法。

using UnityEngine;
using System.Collections;
using System.Collections.Generic;
using System.IO;
using System.Text;
using Common;
public class FileControllor : MonoBehaviour 
{
public void OpenProject()
    {
        OpenFileDlg pth = new OpenFileDlg();
        pth.structSize = System.Runtime.InteropServices.Marshal.SizeOf(pth);
        pth.filter = "txt (*.txt)";
        pth.file = new string(new char[256]);
        pth.maxFile = pth.file.Length;
        pth.fileTitle = new string(new char[64]);
        pth.maxFileTitle = pth.fileTitle.Length;
        pth.initialDir = Application.dataPath;  // default path  
        pth.title = "打开项目";
        pth.defExt = "txt";
        pth.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;
        if (OpenFileDialog.GetOpenFileName(pth))
        {
            string filepath = pth.file;//选择的文件路径;  
            Debug.Log(filepath);
        }
    }
public void SaveProject()
    {
        SaveFileDlg pth = new SaveFileDlg();
        pth.structSize = System.Runtime.InteropServices.Marshal.SizeOf(pth);
        pth.filter = "txt (*.txt)";
        pth.file = new string(new char[256]);
        pth.maxFile = pth.file.Length;
        pth.fileTitle = new string(new char[64]);
        pth.maxFileTitle = pth.fileTitle.Length;
        pth.initialDir = Application.dataPath;  // default path  
        pth.title = "保存项目";
        pth.defExt = "txt";
        pth.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;
        if (SaveFileDialog.GetSaveFileName(pth))
        {
            string filepath = pth.file;//选择的文件路径;  
            Debug.Log(filepath);
        }
    }
}

最终效果如下：

打开文件对话框

保存文件对话框：

文章来源:https://blog.csdn.net/u010989951/article/details/73499614