ios 如何删除导航栏边框/阴影？
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How to remove navigation bar border/shadow?
提问by TimSim
So I have a navigation bar and it has a horizontal line that I'd like to remove.
所以我有一个导航栏，它有一条我想删除的水平线。
I have removed the nav bar color from the screenshot to make the line more apparent.
我已从屏幕截图中删除了导航栏颜色，以使线条更明显。
I have tried setting the shadow image property of the navigation bar to a blank png (1x1 pixel pngs for 1x, 2x and 3x), but there's no effect.
我尝试将导航栏的阴影图像属性设置为空白 png（1x、2x 和 3x 的 1x1 像素 png），但没有效果。
回答by FruitAddict
Those two lines of code always do the trick for me :
这两行代码总是对我有用：
navigationController?.navigationBar.setBackgroundImage(UIImage(), for: UIBarMetrics.default)
navigationController?.navigationBar.shadowImage = UIImage()
回答by Kubba
If you want to do it globally you can do:
如果你想在全球范围内做到这一点，你可以这样做：
UINavigationBar.appearance().shadowImage = UIImage()
UINavigationBar.appearance().setBackgroundImage(UIImage(), for: .default)
