Is there a built in way to create round-cornered UILabels? If the answer is no, how would one go about creating such an object?
One way to do it, which I used recently, is to create a UIView subclass which simply draws a rounded rectangle, and then make the UILabel or, in my case, UITextView, a subview inside of it. Specifically:
UIViewsubclass and name it something like
drawRect:method, draw a path around the bounds of the view using Core Graphics calls like CGContextAddLineToPoint() for the edges and and CGContextAddArcToPoint() for the rounded corners.
UILabelinstance and make it a subview of the RoundRectView.
label.frame = CGRectInset(roundRectView.bounds, 8, 8);)
You can place the RoundRectView on a view using Interface Builder if you create a generic UIView and then change its class using the inspector. You won't see the rectangle until you compile and run your app, but at least you'll be able to place the subview and connect it to outlets or actions if needed.
iPhone OS 3.0 and later supports the
cornerRadius property on the
CALayer class. Every view has a
CALayer instance that you can manipulate. This means you can get rounded corners in one line now:
view.layer.cornerRadius = 8;
You will need to
#import <QuartzCore/QuartzCore.h> and link to the QuartzCore framework to get access to CALayer's headers and properties.