81 lines
2.3 KiB
Markdown
81 lines
2.3 KiB
Markdown
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# FileArchive
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**命名空间**: `XCEngine::Resources`
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**类型**: `class` (extends IArchive)
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**描述**: 文件归档封装类，用于读取归档包（如 .pak、.zip）中的资源文件。
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## 概述
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`FileArchive` 实现了 `IArchive` 接口，提供从单个归档包文件中读取资源的功能。它维护已打开归档的路径和有效性状态。
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## 头文件
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```cpp
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#include <XCEngine/Resources/FileArchive.h>
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```
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## 继承关系
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```
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IArchive
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└── FileArchive
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```
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## 公共方法
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### 构造与析构
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| 方法 | 描述 |
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|------|------|
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| `FileArchive()` | 默认构造 |
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| `~FileArchive()` | 析构函数，关闭归档 |
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### IArchive 接口实现
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| 方法 | 描述 |
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|------|------|
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| `bool Open(const Containers::String& path) override` | 打开归档文件 |
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| `void Close() override` | 关闭归档文件 |
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| `bool Read(const Containers::String& fileName, void* buffer, size_t size, size_t offset) const override` | 从归档中读取文件数据 |
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| `size_t GetSize(const Containers::String& fileName) const override` | 获取归档内文件大小 |
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| `bool Exists(const Containers::String& fileName) const override` | 检查文件是否存在于归档中 |
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| `void Enumerate(const Containers::String& pattern, Containers::Array<Containers::String>& outFiles) const override` | 枚举归档内匹配的文件 |
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| `bool IsValid() const override` | 检查归档是否有效 |
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### 访问器
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| 方法 | 描述 |
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|------|------|
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| `const Containers::String& GetPath() const` | 获取归档文件路径 |
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## 使用示例
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```cpp
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FileArchive archive;
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if (archive.Open("data/resources.pak")) {
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// 检查文件是否存在
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if (archive.Exists("textures/player.png")) {
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// 获取文件大小
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size_t size = archive.GetSize("textures/player.png");
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// 读取文件内容
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Containers::Array<Core::uint8> buffer(size);
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archive.Read("textures/player.png", buffer.Data(), size, 0);
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}
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// 枚举文件
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Containers::Array<Containers::String> files;
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archive.Enumerate("textures/*.png", files);
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archive.Close();
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}
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```
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## 相关文档
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- [IArchive](../filesystem/filesystem.md) - 归档接口
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- [ResourceFileSystem](../filesystem/filesystem.md) - 资源文件系统
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- [Resources 总览](../resources.md) - 返回模块总览
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