Swift label根据文字自适应

/// 动态计算Label宽度

func getLabelWidth(str: String, font: UIFont, height: CGFloat)-> CGFloat {

    let statusLabelText: NSString = str as NSString

    let size = CGSize(width: CGFloat(MAXFLOAT), height: height)

    let strSize = statusLabelText.boundingRect(with: size, options: .usesLineFragmentOrigin, attributes: [NSAttributedStringKey.font : font], context: nil).size

    return strSize.width

}

/// 动态计算Label高度

func getLabelHegit(str: String, font: UIFont, width: CGFloat)-> CGFloat {

    let statusLabelText: NSString = str as NSString

    let size = CGSize(width: width, height: CGFloat(MAXFLOAT))

    let dic = NSDictionary(object: font, forKey: NSAttributedStringKey.font as NSCopying)

    let strSize = statusLabelText.boundingRect(with: size, options: .usesLineFragmentOrigin, attributes: dic as? [NSAttributedStringKey : AnyObject], context: nil).size

    return strSize.height

}