Swift UILable Utils - Get UILabel Heigth based string length

UILabelUtils.swift

extension UILabel {
    func getEstimatedHeight(width: CGFloat) -> CGFloat {
        guard let text = self.text else { return CGFloat.min }
        
        var maxHeight = CGFloat.max
        if (self.numberOfLines > 0) {
            maxHeight = (ceil(self.font.lineHeight) * CGFloat(self.numberOfLines))
        }
        
        let maxSize = CGSizeMake(width, maxHeight)
        let options = NSStringDrawingOptions.UsesFontLeading.union(.UsesLineFragmentOrigin)
        let estimatedSize = NSString(string: text).boundingRectWithSize(maxSize, options: options, attributes: [NSFontAttributeName: self.font], context: nil)
        
        return estimatedSize.height
    }

    func width(font: UIFont) -> CGFloat {
        return (self as NSString).size(attributes: [NSFontAttributeName: font]).width
    }
}

simple way

self.subtitleLabel.sizeThatFits(CGSize(width: width - 32, height: CGFloat.greatestFiniteMagnitude)).height