CODEWITHSUNDEEP
swift
jana_lemmings
jana_lemmings

Reputation: 25

is it possible to make a NSTextView autoscroll down to the last line in swift xcode

i'm trying to make it so that every time i press enter in a textfield

it makes a NSTextView automaticly scroll down to the last line in the scrollview

let range = NSMakeRange(textView.text.characters.count - 1, 0)
textView.scrollRangeToVisible(range)

i tried all sort of ways but it never scroll down the text in the NSTextView

Upvotes: 1

Views: 190

Answers (1)

Leo Dabus
Leo Dabus

Reputation: 236360

You can addLocalMonitorForEvents for .keyDown events to your view controller and check if the event.keyCode == 76.

import Cocoa

class ViewController: NSViewController {
    @IBOutlet var textview: NSTextView!
    var keyDown: Any!
    override func viewDidLoad() {
        super.viewDidLoad()
        keyDown = NSEvent.addLocalMonitorForEvents(matching: .keyDown) {
            self.keyDown(with: $0)
            return $0
        }
    }
    override func keyDown(with event: NSEvent) {
        if event.keyCode == 76 {
            print("enter key pressed")
            DispatchQueue.main.async {
                self.textview.scrollRangeToVisible(NSRange(location: self.textview.string.count, length: 0))
            }
        }
    }
    deinit {
        NSEvent.removeMonitor(keyDown)
    }
}

If you just need to scroll it down after your method adds lines to the textview just add this to the end of it:

DispatchQueue.main.async {
    self.textview.scrollRangeToVisible(NSRange(location: self.textview.string.count, length: 0))
}

Upvotes: 1

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