how to get a textview to autoscroll down when theres a new line - swift

Question

in swift 4.0 for cocoa applications
how do you get a textview to autoscroll down when theres a new line
of text added into it?
is there a built in function for this?
i can't seem to find a way to do this.
chatplace.scroll(<#T##point: NSPoint##NSPoint#>)

Answer 1

Here's a simple example that works:
import UIKit
class ViewController: UIViewController {
var count = 0
var timer:Timer?
#IBOutlet weak var textView: UITextView!
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
textView.isScrollEnabled = true
textView.becomeFirstResponder()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
timer = Timer(timeInterval: 0.125, repeats: true, block: { (timer) in
self.count += 1
self.textView.text.append("\n\(self.count) This is another line")
})
if let timer = timer {
RunLoop.current.add(timer, forMode: .commonModes)
}
}
}
The result:
If you want to scroll programmatically this should do it:
func scrollToEnd(_ someTextView:UITextView) {
let bottom = NSMakeRange(someTextView.text.lengthOfBytes(using: .utf8)-1, 1)
someTextView.scrollRangeToVisible(bottom)
}