unity3d中调用打开和保存对话框(PC发布)
前两天想用unity3d调用一下打开和保存对话框，网上学习了一下，希望能给有用到的朋友一点帮助。这里有点小问题，最开始想引用system.windows.forms，用openfiledialog和savefiledialog，但是unity会直接崩溃这个我不知道是什么问题，如果有人知道的话能给说一下吗。。。最后用到的是win32的方式才成功的
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;
}
public class DllTest
{
[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);
}
[DllImport("Comdlg32.dll", SetLastError = true, ThrowOnUnmappableChar = true, CharSet = CharSet.Auto)]
public static extern bool GetSaveFileName([In, Out] OpenFileName ofn);
public static bool GetSaveFileName1([In, Out] OpenFileName ofn)
{
return GetSaveFileName(ofn);
}
}
[StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)]
这是C#引用非托管的C/C++的DLL的一种定义定义结构体的方式，主要是为了内存中排序，LayoutKind有两个属性Sequential和Explicit
Sequential表示顺序存储，结构体内数据在内存中都是顺序存放的
Explicit表示精确布局，需要用FieldOffset()设置每个成员的位置
这都是为了使用非托管的指针准备的，知道什么意思就行，C#的CLR提供了更为灵活的自动管理方式，所以对C#来说可有可无。
CharSet=CharSet.Ansi表示编码方式
OpenfileName里面是对话框的一些基本属性，在实例化的时候根据情况写。
下面
这个是c#动态调用dll的一种方式。c#需要调用外部dll的方法，那么需要告诉编译器，引进的dll的名称，要调用该dll的哪个方法（动态入口点），以及调用的方式。这三个是主要的，CharSet 这种的设置就依情况而定了。然后用到win32的两个api：OpenFileName 和 SaveFileName 然后是unity
using UnityEngine;
using System.Collections;
using System.Text;
using System.Runtime.InteropServices;
using System;
using System.IO;
public class Test : MonoBehaviour {
void OnGUI()
{
if (GUI.Button(new Rect(0, 0, 100, 35), "OpenDialog"))
{
OpenFileName ofn = new OpenFileName();
ofn.structSize = Marshal.SizeOf(ofn);
ofn.filter = "All Files\0*.*\0\0";
ofn.file = new string(new char[256]);
ofn.maxFile = ofn.file.Length;
ofn.fileTitle = new string(new char[64]);
ofn.maxFileTitle = ofn.fileTitle.Length;
ofn.initialDir = UnityEngine.Application.dataPath;//默认路径
ofn.title = "Open Project";
//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 (DllTest.GetOpenFileName(ofn))
{
StartCoroutine(WaitLoad(ofn.file));
}
}
if (GUI.Button(new Rect(0, 100, 100, 35), "SaveDialog"))
{
OpenFileName ofn = new OpenFileName();
ofn.structSize = Marshal.SizeOf(ofn);
ofn.filter = "All Files\0*.*\0\0";
ofn.file = new string(new char[256]);
ofn.maxFile = ofn.file.Length;
ofn.fileTitle = new string(new char[64]);
ofn.maxFileTitle = ofn.fileTitle.Length;
ofn.initialDir = UnityEngine.Application.dataPath;//默认路径
ofn.title = "Save Project";
ofn.flags = 0x00080000 | 0x00001000 | 0x00000800 | 0x00000200 | 0x00000008;
if (DllTest.GetSaveFileName(ofn))
{
StartCoroutine(WaitSave(ofn.file));
}
}
}
IEnumerator WaitLoad(string fileName)
{
FileInfo fi = new FileInfo(fileName);
fi.CopyTo(UnityEngine.Application.dataPath + "/Resources/a.txt", true);
yield return fi;
}
IEnumerator WaitSave(string fileName)
{
FileInfo fi = new FileInfo(UnityEngine.Application.dataPath + "/Resources/a.txt");
fi.CopyTo(fileName, true);
yield return fi;
}
}源码分享
http://pan.baidu.com/s/1dD7zcRn