iOS 7中的半透明导航栏

Question

I have been trying to figure this out all day. How do I change the transparency level for the UINavigationBar on iOS 7?

This is what I have tried (with no success):

• Setting the UINavigationBar tint colour to have transparency: [self.navigationController.navigationBar setTintColor:[UIColor colorWithWhite:1 alpha:0.01f]] . This works, but the image as the background for my UIViewController appears to be grayscale.
• Setting the alpha of both the UINavigationBar and the CALayer for the UINavigationBar.

Thank you very much.

Edit: I am trying to achieve something like this .

Answer 1

I don't believe it to be possible to make the bar opaque anymore. The link you added does not have an opaque bar either. It is translucent with what looks to be a blue barTintColor.

What I suspect you are trying to do is have your content not covered by the translucent bar. In that case, look at UIViewController edgesForExtendedLayout . You probably want self.edgesForExtendedLayout = UIRectEdgeNone; .