# 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)