XCEngine/docs/api/core/filewriter/IsOpen.md

# FileWriter::IsOpen

```cpp
bool IsOpen() const;
```

检查文件是否已打开。

**描述**

返回文件是否已成功打开并可用于写入。

**返回：** `bool` - 文件是否已打开

**线程安全：** ✅

**复杂度：** O(1)

**示例：**

```cpp
#include <XCEngine/Core/FileWriter.h>

using namespace XCEngine::Core;

FileWriter writer1;
if (writer1.IsOpen()) {
    // 不会执行
    writer1.Write("test");
}

// 打开文件
FileWriter writer2("output.txt");
if (writer2.IsOpen()) {
    printf("File opened successfully\n");
    writer2.Write("Content");
} else {
    printf("Failed to open file\n");
}
```

## 相关文档

- [FileWriter 总览](filewriter.md) - 返回类总览
- [Open](Open.md) - 打开文件