# materialize

**将序列产生的事件，转换成元素**

![](/files/-MWlwRF2ncvb7ckl_4Z7)

通常，一个有限的 `Observable` 将产生零个或者多个 `onNext` 事件，然后产生一个 `onCompleted` 或者 `onError` 事件。

**materialize** 操作符将 `Observable` 产生的这些事件全部转换成元素，然后发送出来。


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://3440217568.gitbook.io/rxswift/decision_tree/materialize.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.