点击UIButton以编程方式创建另一个UIButton

I'm trying to create a UIButton programmatically. I have a button called "addCash" (which was already created in interface builder), upon tapping this button I want another button to dynamically appear. This button works fine when done in viewDidLoad, but this is not what I want as "addCash" needs to be tapped before this new button is to be created. This is what I have so far...I'm trying to create a UIButton programmaticall