> 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/never.md).

# never

**创建一个永远不会发出元素的 `Observable`**

![](https://4217506537-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MWj545abP2yK86-qksJ%2Fsync%2F4263ffb8d5cd2a480fb945bbe7a7b06530bd9309.png?generation=1616819397340374\&alt=media)

**never** 操作符将创建一个 `Observable`，这个 `Observable` 不会产生任何事件。

## 演示

创建一个不会产生任何事件的 `Observable`：

```swift
let id = Observable<Int>.never()
```

它相当于：

```swift
let id = Observable<Int>.create { observer in
    return Disposables.create()
}
```