30 lines
603 B
Markdown
30 lines
603 B
Markdown
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# ResourceHandle::IsValid
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```cpp
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bool IsValid() const
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```
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检查句柄是否持有有效资源。判断条件为：内部指针非空且资源的 `IsValid()` 返回 true。
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**参数：** 无
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**返回：** 如果持有有效资源则返回 true，否则返回 false
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**复杂度：** O(1)
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**示例：**
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```cpp
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ResourceHandle<Texture> tex = ResourceManager::Get().Load<Texture>("tex.png");
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if (tex.IsValid()) {
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// 安全访问资源
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tex->GenerateMipmaps();
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} else {
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printf("Texture load failed!\n");
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}
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```
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## 相关文档
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- [ResourceHandle 总览](resourcehandle.md) - 返回类总览
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