ios - 如何在 NSAttributedString 上设置字体大小

Question

编辑 - 这已被标记为重复，但正如我在下面所述，我正在寻找 Swift 解决方案。我发现的所有内容都是用 Objective C 编写的。

我正在尝试将 HTML 转换为 NSAttributedString，但不知道如何设置字体样式和大小。所有示例都在我不熟练的Objective C中。如何将字体样式/大小设置为System 15(作为示例)

private func stringFromHtml(string: String) -> NSAttributedString? {
        do {
            let data = string.data(using: String.Encoding.utf8, allowLossyConversion: true)
            if let d = data {
                let str = try NSAttributedString(data: d,
                                                 options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType],                                                  documentAttributes: nil)
                return str
            }
        } catch {
        }
        return nil
    }

编辑......我已经尝试了几种方法。我无法让它工作。我现在收到一条错误消息:没有更多上下文，表达式类型不明确。它指向 NSAttributedString我尝试了以下方法:

let myAttribute = [ NSForegroundColorAttributeName: UIColor.blue ]
let data = string.data(using: String.Encoding.utf8, allowLossyConversion: true)
  if let d = data {
     let str = try NSAttributedString(data: d,
                       attributes: myAttribute,
                       options: [NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)

Answer 1

let myString = "Swift Attributed String"
let myAttribute = [ NSForegroundColorAttributeName: UIColor.blue ]
let myAttrString = NSAttributedString(string: myString, attributes: myAttribute) 

// set attributed text on a UILabel
myLabel.attributedText = myAttrString

字体

let myAttribute = [ NSFontAttributeName: UIFont(name: "Chalkduster", size: 18.0)! ]

阴影

let myShadow = NSShadow()
myShadow.shadowBlurRadius = 3
myShadow.shadowOffset = CGSize(width: 3, height: 3)
myShadow.shadowColor = UIColor.gray
let myAttribute = [ NSShadowAttributeName: myShadow ]

下划线

let myAttribute = [ NSUnderlineStyleAttributeName: NSUnderlineStyle.StyleSingle.rawValue ]

文字颜色

let myAttribute = [ NSForegroundColorAttributeName: UIColor.blue ]

背景颜色

let myAttribute = [ NSBackgroundColorAttributeName: UIColor.yellow ]