we can use different types of system fonts like below
myButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: 17)
myButton.titleLabel?.font = UIFont.italicSystemFont(ofSize:UIFont.smallSystemFontSize)
myButton.titleLabel?.font = UIFont.boldSystemFont(ofSize: UIFont.buttonFontSize)
and your custom font like below
myButton.titleLabel?.font = UIFont(name: "Helvetica", size:12)
From the documentation:
The font used to display text on the button. (Deprecated in iOS 3.0. Use the
font
property of thetitleLabel
instead.)
In Swift 5, you can utilize dot notation for a bit quicker syntax:
myButton.titleLabel?.font = .systemFont(ofSize: 14, weight: .medium)
Otherwise, you'll use:
myButton.titleLabel?.font = UIFont.systemFont(ofSize: 14, weight: .medium)
btn.titleLabel?.font = .systemFont(ofSize: 12)
this work for me, thanks. I want change text size only not change font name.
var fontSizeButtonBig:Int = 30
btnMenu9.titleLabel?.font = .systemFont(ofSize: CGFloat(fontSizeButtonBig))
If you are setting AttributedString to the UIButton then you can do the below thing.
let attributedText = NSAttributedString(string: "Hello", attributes: [NSAttributedStringKey.font: UIFont(name: "Calibri", size: 19)])
okayButton.setAttributedTitle(attributedText, for: .normal)
If you need to change only size (Swift 4.0):
button.titleLabel?.font = button.titleLabel?.font.withSize(12)
For Swift 3.0:
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)
where "boldSystemFont" and "16" can be replaced with your custom font and size.
Example: button.titleLabel?.font = UIFont(name: "HelveticaNeue-Bold", size: 12)
Take a look here.
You should set the font of the button's titleLabel instead.
myButton.titleLabel!.font = UIFont(name: "...", 10)
You don't need to force unwrap the titleLabel to set it.
myButton.titleLabel?.font = UIFont(name: YourfontName, size: 20)
Since you're not using the titleLabel here, you can just optionally use it and if it's nil it will just be a no-op.
I'll also add as other people are saying, the font property is deprecated, and make sure to use setTitle:forControlState:
when setting the title text.
If you're having font size issues (your font isn't responding to size changes)...
@codester has the right code:
myButton.titleLabel!.font = UIFont(name: YourfontName, size: 20)
However, my font size wasn't changing. It turns out that I asking for a font that didn't exist ("HelveticaNeue-Regular"). It wasn't causing a crash, but seemed to be just ignoring that font statement because of it. Once I changed the font to something that does exist, changes to "size: x" did render.
You should go through the titleLabel
property.
button.titleLabel.font
The font
property has been deprecated since iOS 3.0.
This works in Swift 3.0:
btn.titleLabel?.font = UIFont(name:"Times New Roman", size: 20)
This way doesn't work now:
btn.titleLabel?.font = UIFont(name: "Helvetica", size:12)
This works:
btn.titleLabel?.font = UIFont.init(name: "Helvetica", size:12)
Source: Stackoverflow.com