Unity调用系统窗口选择文件或文件路径

本篇文章主要给大家介绍下调用系统窗口选择文件或文件路径的方法，针对不同需求用的功能也会有所不同，如果有不了解的同学可以看看下面的介绍。

1.OpenFileName数据接收类，如下：

using UnityEngine;
using System.Collections;
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;
｝

2.系统函数调用类， 如下：

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); 
    ｝
｝

3.测试入口类，如下：

using UnityEngine;
using System.Collections;
using System.Runtime.InteropServices;
public class DialogTest : MonoBehaviour ｛
    void OnGUI()
    ｛
        if (GUI.Button(new Rect(10,10,100,50),"Open"))
        ｛
            OpenFileName openFileName = new OpenFileName();
            openFileName.structSize = Marshal.SizeOf(openFileName);
            openFileName.filter = "Excel文件(*.xlsx)\0*.xlsx";
            openFileName.file = new string(new char[256]);
            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 = "窗口标题";
            openFileName.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000008;
            if (LocalDialog.GetSaveFileName(openFileName))
            ｛
                Debug.Log(openFileName.file);
                Debug.Log(openFileName.fileTitle);
            ｝
        ｝
    ｝
｝

效果如下：

Paste_Image.png

4.详细OpenFileName参数 请点这里;