如何使用FontAwesome制作一个包含多行的UIButton?

在Swift 3。

override func viewDidLoad() {
    super.viewDidLoad()

     //applying the line break mode
    btnProfile?.titleLabel?.lineBreakMode = NSLineBreakMode.byWordWrapping;

    let buttonText: NSString = "⭐️ Favourite\nProfile"

    //getting the range to separate the button title strings
    let newlineRange: NSRange = buttonText.range(of: "\n")

    //getting both substrings
    var substring1: NSString = ""
    var substring2: NSString = ""

    if(newlineRange.location != NSNotFound) {
        substring1 = buttonText.substring(to: newlineRange.location) as NSString
        substring2 = buttonText.substring(from: newlineRange.location) as NSString
    }


    //assigning diffrent fonts to both substrings
    let font:UIFont? = UIFont(name: "Chalkduster", size: 50.0)
    let attrString = NSMutableAttributedString(string: substring1 as String, attributes: NSDictionary(object: font!, forKey: NSFontAttributeName as NSCopying) as? [String : Any])        
    let font1:UIFont? = UIFont(name: "Noteworthy-Light", size: 30.0)
    let attrString1 = NSMutableAttributedString(string: substring2 as String, attributes: NSDictionary(object: font1!, forKey: NSFontAttributeName as NSCopying) as? [String : Any]) 

    //appending both attributed strings
    attrString.append(attrString1)

    //assigning the resultant attributed strings to the button
    btnProfile.setAttributedTitle(attrString, for: UIControlState.normal)
    btnProfile.titleLabel?.textAlignment = .center

}

输出: