如何在普通文本视图中使用Swift Playgrounds风格的代码输入键盘/文本字段？

I'm making an iPad app that lets me write swift code into a text box and save it to a document. It doesn't do any compilation or any complicated stuff like that, so I'm just looking for a way to format the code correctly in the text box (ex: code autocomplete, autoindent if possible, and maybe syntax highlighting). In short, I'd like my app's text field and keyboard to look similar to those of Swift Playgrounds.I'm making an iPad app that lets me write swift