如何删除和添加回导航栏阴影？

Question

如果我删除导航栏阴影：

self.navigationController?.navigationBar.shadowImage = UIImage()

我怎样才能加回这个阴影？

Answer 1

//Extension 
  extension UINavigationBar {

    func shouldRemoveShadow(_ value: Bool) -> Void {
    if value {
        self.setValue(true, forKey: "hidesShadow")
    } else {
        self.setValue(false, forKey: "hidesShadow")
    }
  }
 }
 //Use in view controller.
 self.navigationController?.navigationBar.shouldRemoveShadow(true)

Answer 2

来自docs.

The default value is nil, which corresponds to the default shadow image.

所以你设置就够了

self.navigationController?.navigationBar.shadowImage = nil

如何删除和添加回导航栏阴影？

How to remove and add back navigationBar shadow?

uinavigationbar

ios

swift