How to change font of UIButton with Swift

Use titleLabel instead. The font property is deprecated in iOS 3.0. It also does not work in Objective-C. titleLabel is label used for showing title on UIButton.

myButton.titleLabel?.font =  UIFont(name: YourfontName, size: 20)

However, while setting title text you should only use setTitle:forControlState:. Do not use titleLabel to set any text for title directly.

For Swift 3.0:

button.titleLabel?.font = UIFont.boldSystemFont(ofSize: 16)

where "boldSystemFont" and "16" can be replaced with your custom font and size.

Dot-notation is awesome 👌

btn.titleLabel?.font = .systemFont(ofSize: 12)

As mentioned by many here you can set the font with something like:

button.titleLabel?.font = .systemFont(ofSize: 19.0, weight: .bold)

Just make sure your button has default style though for this to be applicable, otherwise the above gets ignored by the system.

https://i.stack.imgur.com/RINpu.png

If you need to change only size (Swift 4.0):

button.titleLabel?.font = button.titleLabel?.font.withSize(12)

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.

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)

From the documentation:

The font used to display text on the button. (Deprecated in iOS 3.0. Use the font property of the titleLabel instead.)

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.

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)

Take a look here.

You should set the font of the button's titleLabel instead.

myButton.titleLabel!.font = UIFont(name: "...", 10)

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) 

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)

Example: button.titleLabel?.font = UIFont(name: "HelveticaNeue-Bold", size: 12)

If you want to use defaul font from it's own family, use for example: "HelveticaNeue"

If you want to specify family font, use for example: "HelveticaNeue-Bold"

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)

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))

To do this using storyboard, go to the attributes inspector while your button is selected. In the third field from the top ("Title") select "Attributed". This will bring up the font drop-down list where you can easily change the font.