A Boolean value indicating whether the navigation bar is translucent (
true) or not (
- iOS 3.0+
- tvOS 9.0+
When the navigation bar is translucent, configure the
extended properties of your view controller to display your content underneath the navigation bar.
If the navigation bar doesn't have a custom background image, or if any pixel of the background image has an alpha value of less than
1, the default value of this property is
true. If the background image is completely opaque, the default value of this property is
false. If you set this property to
true and the custom background image is completely opaque, UIKit applies a system-defined opacity of less than
1 to the image. If you set this property to
false and the background image is not opaque, UIKit adds an opaque backdrop.