UIlabel layer.cornerRadius not working in iOS 7.1

Set the property clipsToBounds to true

addMessageLabel.clipsToBounds = true

I think the best way to set corner radius is:

and be sure the "Clip Subviews" is checked:

Checking "Clip Subviews" is equal to the code addMessageLabel.clipsToBounds = YES;.

Try the followings,

[[addMessageLabel layer] setCornerRadius:5.0f];
[[addMessageLabel layer] setMasksToBounds:YES];

//or
[addMessageLabel setClipsToBounds:YES];

Swift

addMessageLable.layer.cornerRadius = 5.0
addMessageLable.layer.masksToBounds = true

//or
addMessageLable.layer.clipsToBounds = true

My issue was a bit different.

While I did do btn.clipsToBounds = true

I wasn't setting doing:

btn.layer.cornerRadius = 20

Because I had different screen sizes. Instead I followed this answer and did:

override func layoutSubviews() {
    seeMoreButton.layer.cornerRadius = seeMoreButton.bounds.size.height / 2
}

It wasn't working because I forgot to add super.layoutSubviews(). The correct code is:

override func layoutSubviews() {
    super.layoutSubviews()
    seeMoreButton.layer.cornerRadius = seeMoreButton.bounds.size.height / 2
}