Getting Height or Width of Text

You use UIView.sizeThatFits to get the best size to fit a given size.

• To get width, fix the height and maximize the width of your given size.
• To get height, fix the width and maximize the height of your given size.

Code Example of Getting Width of Text

 
@IBOutlet weak var sampleTextLabel: UILabel!

@IBOutlet weak var widthTextField: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()
    
    // Fix the height to get the width.
    let suggestedSize = CGSize(width: CGFloat.greatestFiniteMagnitude, 
                               height: sampleTextLabel.frame.height)
    widthTextField.text = sampleTextLabel.sizeThatFits(suggestedSize).width.description
}
 

Note: CGFloat.greatestFiniteMagnitude gives you the maximum number for a float.

(Xcode 8, Swift 3.0)