44 lines
716 B
Markdown
44 lines
716 B
Markdown
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# FileWriter::IsOpen
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```cpp
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bool IsOpen() const;
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```
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检查文件是否已打开。
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**描述**
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返回文件是否已成功打开并可用于写入。
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**返回：** `bool` - 文件是否已打开
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**复杂度：** O(1)
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**示例：**
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```cpp
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#include <XCEngine/Core/FileWriter.h>
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using namespace XCEngine::Core;
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FileWriter writer1;
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if (writer1.IsOpen()) {
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// 不会执行
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writer1.Write("test");
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}
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// 打开文件
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FileWriter writer2("output.txt");
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if (writer2.IsOpen()) {
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printf("File opened successfully\n");
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writer2.Write("Content");
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} else {
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printf("Failed to open file\n");
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}
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```
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## 相关文档
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- [FileWriter 总览](filewriter.md) - 返回类总览
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- [Open](Open.md) - 打开文件
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