ios - 在第一个界面设置完导航栏为半透明之后，再返回到第一个界面 会留出64像素。求解

Answer 1

As long as one pixel of the navigation bar is transparent, it will float above the content view and will no longer be stretched by 64 px. Apple’s official documentation also explains this.

You can manually specify the navigation pattern to be opaque:

self.navigationController.navigationBar.translucent = NO;