> For the complete documentation index, see [llms.txt](https://3440217568.gitbook.io/rxswift/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://3440217568.gitbook.io/rxswift/decision_tree/sharereplay.md).

# shareReplay

**使观察者共享 `Observable`，观察者会立即收到最新的元素，即使这些元素是在订阅前产生的**

![](/files/-MWlwNOa9AlsMSIS6eam)

**shareReplay** 操作符将使得观察者共享源 `Observable`，并且缓存最新的 **n** 个元素，将这些元素直接发送给新的观察者。


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