Hello, I am making a To-Do list iOS application using Xcode 9 and Swift 4. I have most of it figured out. I have a text field with an add button. When I click the add button it adds the text field content to a text view. When the content is added to the text view, I want a button at the end of that line that says complete. When the complete buttom is pressed, I want the complete button to change to a green color and I want the button's text to change to completed. How do I do that?

Using Swift 4

Thank you