I am making an app where I have 3 labels. I am using label auto-shrinking to help adapt the label\'s font size to the device.
These labels are right next to each other,
Programatically change UIlabel font size after dynamic resizing. See the example below. Calculate current font size with length of string & font. And then get minimum font size and apply separately for each UILabel
override func viewWillAppear(_ animated: Bool) {
let fontSize1 = self.label1.getFontSizeForLabel()
let fontSize2 = self.label2.getFontSizeForLabel()
let fontSize3 = self.label3.getFontSizeForLabel()
let smallestFontSize = min(min(fontSize1, fontSize2), fontSize3)
self.label1.font = self.label1.font.withSize(smallestFontSize)
self.label2.font = self.label2.font.withSize(smallestFontSize)
self.label3.font = self.label3.font.withSize(smallestFontSize)
self.label1.adjustsFontSizeToFitWidth = false
self.label2.adjustsFontSizeToFitWidth = false
self.label3.adjustsFontSizeToFitWidth = false
}
UILabel Extension
extension UILabel {
func getFontSizeForLabel() -> CGFloat {
let text: NSMutableAttributedString = NSMutableAttributedString(attributedString: self.attributedText!)
text.setAttributes([NSAttributedStringKey.font: self.font], range: NSMakeRange(0, text.length))
let context: NSStringDrawingContext = NSStringDrawingContext()
context.minimumScaleFactor = self.minimumScaleFactor
text.boundingRect(with: self.frame.size, options: NSStringDrawingOptions.usesLineFragmentOrigin, context: context)
let adjustedFontSize: CGFloat = self.font.pointSize * context.actualScaleFactor
return adjustedFontSize
}
}
Storyboard
Output