UINavigationBar圆了两个角落

Question

I want to round the top right and top left of the UINavigationBar.

I know that there are functions for changing the views corner radius, but is it possible to do something similar to the standard UINavigationBar?

If you don't know what I'm talking about, check out this:

Thanks!

Answer 1

the following code works for me (tested on iOS5). The following code rounds the top left/right corners of the main navigation bar. Additionally, it adds a shadow to it:

CALayer *capa = [self.navigationController navigationBar].layer;
[capa setShadowColor: [[UIColor blackColor] CGColor]];
[capa setShadowOpacity:0.85f];
[capa setShadowOffset: CGSizeMake(0.0f, 1.5f)];
[capa setShadowRadius:2.0f];  
[capa setShouldRasterize:YES];


//Round
CGRect bounds = capa.bounds;
bounds.size.height += 10.0f;    //I'm reserving enough room for the shadow
UIBezierPath *maskPath = [UIBezierPath bezierPathWithRoundedRect:bounds 
                                               byRoundingCorners:(UIRectCornerTopLeft | UIRectCornerTopRight)
                                                     cornerRadii:CGSizeMake(10.0, 10.0)];

CAShapeLayer *maskLayer = [CAShapeLayer layer];
maskLayer.frame = bounds;
maskLayer.path = maskPath.CGPath;

[capa addSublayer:maskLayer];
capa.mask = maskLayer;

Answer 2

最好的方法是覆盖UINavigationBar中的drawRect并使用自定义图像。

Answer 3

You might find this helpful. Maybe you could also do some kind of masking with CoreAnim/Image? I'm not very knowledgeable about the Core* family...

http://foobarpig.com/iphone/uinavigationbar-with-solid-color-or-image-background.html