> For the complete documentation index, see [llms.txt](https://ryukiedev.gitbook.io/wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ryukiedev.gitbook.io/wiki/ios/za-xiang/yin-cang-dao-hang-lan-xia-mian-de-xian.md).

# 05.隐藏导航栏下面的线

```swift
[self.navigationController.navigationBar setBackgroundImage:[UIImage new] forBarMetrics:UIBarMetricsDefault];
[self.navigationController.navigationBar setShadowImage:[UIImage new]];
```

![效果](http://ohfpqyfi7.bkt.clouddn.com/03B6EE70E631F551954E55D027C8BE25.png)