> 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/skipwhile.md).

# skipWhile

## skipWhile

**跳过 `Observable` 中头几个元素，直到元素的判定为否**

![](/files/-MWlwR5vrMZGXqCaEfqT)

**skipWhile** 操作符可以让你忽略源 `Observable` 中头几个元素，直到元素的判定为否后，它才镜像源 `Observable`。

## 演示

```swift
let disposeBag = DisposeBag()

Observable.of(1, 2, 3, 4, 3, 2, 1)
    .skipWhile { $0 < 4 }
    .subscribe(onNext: { print($0) })
    .disposed(by: disposeBag)
```

**输出结果：**

```swift
4
3
2
1
```