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XCSDD/docs/api/resources/resourcecache/touch.md
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# ResourceCache::Touch
```cpp
void Touch(ResourceGUID guid)
```
更新资源的最近访问时间。当缓存条目被命中时调用,用于 LRU 驱逐算法判断资源的访问热度。
**参数:**
- `guid` - 资源全局唯一标识符
**返回:**
**复杂度:** O(1)
**示例:**
```cpp
IResource* res = cache.Find(guid);
if (res) {
cache.Touch(guid); // 更新 LRU
}
```
## 相关文档
- [ResourceCache 总览](resourcecache.md) - 返回类总览