How to round edges of UILabel with Swift

Use label layer corner radius to do that,

mylabel.layer.cornerRadius = yourvalue

if you don't want to show shadow then add,

mylabel.layer.masksToBounds = true 

it worked for me fine.

You can give cornerRadius and border like this.

For Swift 5, 4 and 3

MyLable.layer.masksToBounds = true
MyLable.layer.cornerRadius = 6
MyLable.layer.borderWidth = 2
MyLable.layer.borderColor = UIColor.black.cgColor

For Objective-C

[MyLable.layer setMasksToBounds:TRUE];
[MyLable.layer setCornerRadius:6];
[MyLable.layer setBorderWidth:2];
[MyLable.layer setBorderColor:[UIColor blackColor].CGColor];

The trick is to set maskToBounds to true. Then your modifications to cornerRadius will be visible.

label.layer.masksToBounds = true
label.layer.cornerRadius = 5

Assuming you have added a backgroundColor to your label otherwise there would be no way to tell if it had edges, you can use QuartzCore to round the edges of a label.

import QuartzCore

yourLabel.layer.backgroundColor  = UIColor.redColor().CGColor
yourLabel.layer.cornerRadius = 5
yourLabel.layer.masksToBounds = true