iphone - CALayer: add a border only at one side

Question

I can add a border to a CALayer in this way:

[webView.layer setBorderColor: [[UIColor colorWithRed:0.6 green:0.7 blue:0.2 alpha:1] CGColor]];
[webView.layer setBorderWidth: 2.75];   

But is it possible to add a border only at one side? I only need a border at the bottom. Or can I reach this with other properties, e.g. frame, bounds, mask, ...?

Thanks for your help!

---

@Control-V

        UIWebView *webView = [[UIWebView alloc] init];
        CALayer *webViewLayer = webView.layer;

        // now you can do a lot of stuff like borders:
        [webViewLayer setBorderColor: [[UIColor greenColor] CGColor]];
        [webViewLayer setBorderWidth: 2.75];    

Have a look at the CALayer documentation: https://developer.apple.com/documentation/quartzcore/calayer

And have a look here: http://iosdevelopertips.com/cocoa/add-rounded-corners-and-border-to-uiwebview.html

Answer 1

I made a right border using this:

leftScrollView.clipsToBounds = YES;

CALayer *rightBorder = [CALayer layer];
rightBorder.borderColor = [UIColor darkGrayColor].CGColor;
rightBorder.borderWidth = 1;
rightBorder.frame = CGRectMake(-1, -1, CGRectGetWidth(leftScrollView.frame), CGRectGetHeight(leftScrollView.frame)+2);

[leftScrollView.layer addSublayer:rightBorder];