Swift4的attributesString得到了输入属性

您可以将[String: Any]字典映射到 [NSAttributedStringKey: Any]字典

let typingAttributes = Dictionary(uniqueKeysWithValues: self.textView.typingAttributes.map {
    key, value in (NSAttributedStringKey(key), value)
})

let text = NSAttributedString(string: "test123", attributes: typingAttributes)

这是一个可能的扩展方法,它仅限于使用字符串键的字典:

extension Dictionary where Key == String {

    func toAttributedStringKeys() -> [NSAttributedStringKey: Value] {
        return Dictionary(uniqueKeysWithValues: map {
            key, value in (NSAttributedStringKey(key), value)
        })
    }
}