Version: 2020.1
语言: 中文

AsyncReadManager.Read

切换到手册
public static Unity.IO.LowLevel.Unsafe.ReadHandle Read (string filename, ReadCommand* readCmds, uint readCmdCount);

参数

filename 要读取的文件名。
readCmds 指向 ReadCommand 结构（用于指定偏移、大小和目标缓冲区）数组的指针。
readCmdCount readCmds 指向的读取命令数。

返回

ReadHandle 用于监控读取命令的进度和状态。

描述

发出一个异步文件读取操作。返回 ReadHandle。

using System.IO;
using Unity.Collections;
using Unity.IO.LowLevel.Unsafe;
using Unity.Collections.LowLevel.Unsafe;
using UnityEngine;

class AsyncReadSample : MonoBehaviour
{
    private ReadHandle readHandle;
    NativeArray<ReadCommand> cmds;

    public unsafe void Start()
    {
        string filePath = Path.Combine(Application.streamingAssetsPath, "myfile.bin");
        cmds = new NativeArray<ReadCommand>(1, Allocator.Persistent);
        ReadCommand cmd;
        cmd.Offset = 0;
        cmd.Size = 1024;
        cmd.Buffer = (byte*)UnsafeUtility.Malloc(cmd.Size, 16, Allocator.Persistent);
        cmds[0] = cmd;
        readHandle = AsyncReadManager.Read(filePath, (ReadCommand*)cmds.GetUnsafePtr(), 1);
    }

    public unsafe void Update()
    {
        if (readHandle.IsValid() &amp;&amp; readHandle.Status != ReadStatus.InProgress)
        {
            Debug.LogFormat("Read {0}", readHandle.Status == ReadStatus.Complete ? "Successful" : "Failed");
            readHandle.Dispose();
            UnsafeUtility.Free(cmds[0].Buffer, Allocator.Persistent);
            cmds.Dispose();
        }
    }
}

Did you find this page useful? Please give it a rating:

版权所有 © 2020 Unity Technologies. Publication 2020.1
教程 社区答案 知识库 论坛 Asset Store 商标和使用条款 法律条款 隐私政策 Cookie 不要出售或分享我的个人信息