如何在Swift中根据用户类型调整UITextField的大小

Question

I'm trying to write a messaging application in Swift on IOS8. Essentially I'm trying to mimic what the texting app in IOS does when you reach the edge of the textfield--the height of the textfield increases, and a new line is made. Right now when I type, the words just scroll to the side. How can I prevent the side scrolling and instead resize the textfield?

Answer 1

I would definitely use UITextView combined with its textViewDidChange: delegate method. You can track when the inside text changes and update your textView width (or height) accordingly by measuring its content size from constraints you specify.

You can also reimplement drawRect: to add your rounded borders or customize properties of its layer (like cornerRadius ).

Placeholder can be also implemented by tracking text changes (whether by delegate methods or notifications).

I agree this isn't optimal, but at least you still have options to mimic UITextField behaviors.