记录：
using UnityEngine;
using System.IO;
using System.Runtime.InteropServices;
/// <summary>
/// 结构体和二进制相互转换
/// </summary>
public class FileTest11 : MonoBehaviour {
private int size;
// Use this for initialization
void Start () {
FileStream fs = new FileStream("d://jtest11.txt", FileMode.OpenOrCreate);
BinaryWriter b = new BinaryWriter(fs);
Vector3 v = new Vector3(31, 2, 3);
byte[] bytes = StructToBytes(v);
b.Write(StructToBytes(v));
b.Close();
for (int i = 0; i < bytes.Length; i++) {
Debug.LogError("============="+bytes[i]);
}
//b.
}
// Update is called once per frame
void Update () {
if (Input.GetKeyDown(KeyCode.Space)) {
FileStream fstream= File.OpenRead("d://jtest11.txt");
BinaryReader reader = new BinaryReader(fstream);
byte[] bs= reader.ReadBytes(size);
Debug.LogError("================" + (Vector3)BytesToStruct(bs, typeof(Vector3)));
reader.Close();
}
}
public byte[] StructToBytes(object obj)
{
//得到结构体的大小
size = Marshal.SizeOf(obj);
//创建byte数组
byte[] bytes = new byte[size];
//分配结构体大小的内存空间
System.IntPtr structPtr = Marshal.AllocHGlobal(size);
//将结构体拷到分配好的内存空间
Marshal.StructureToPtr(obj, structPtr, false);
//从内存空间拷到byte数组
Marshal.Copy(structPtr, bytes, 0, size);
//释放内存空间
Marshal.FreeHGlobal(structPtr);
//返回byte数组
return bytes;
}
/// <summary>
/// byte数组转结构
/// </summary>
/// <param name="bytes">byte数组</param>
/// <param name="type">结构类型</param>
/// <returns>转换后的结构</returns>
public object BytesToStruct(byte[] bytes, System.Type type)
{
//得到结构的大小
int size = Marshal.SizeOf(type);
Debug.LogError(size.ToString());
//byte数组长度小于结构的大小
if (size > bytes.Length)
{
//返回空
return null;
}
//分配结构大小的内存空间
System.IntPtr structPtr = Marshal.AllocHGlobal(size);
//将byte数组拷到分配好的内存空间
Marshal.Copy(bytes, 0, structPtr, size);
//将内存空间转换为目标结构
object obj = Marshal.PtrToStructure(structPtr, type);
//释放内存空间
Marshal.FreeHGlobal(structPtr);
//返回结构
return obj;
}
}
