如何在XCode中使用Swift创建一个新的NSWindow并以编程方式向其添加内容?

I come from a background in Java, and I'm trying out using swift for creating OSX and iOS applications. My current project is essentially a flashcard application, and it needs to be able to create a popup window for text-based user prompts (ie, to ask what the question is for the card, or to add String tags for sorting the flashcards by type). Here is the code that I put together so far:I come from a background in Java, and I'm tryin