Cant change border color in Cocoa Swift Mac OS - swift

Question

I am new to Cocoa with Swift and made a textfield programmatically like this:
let usernameTextField: NSTextField = {
let textField = NSTextField()
textField.isBezeled = false
textField.drawsBackground = false
textField.focusRingType = .none
textField.placeholderString = "Username"
textField.font = NSFont.systemFont(ofSize: 18)
textField.translatesAutoresizingMaskIntoConstraints = false
return textField
}()
Later, in viewDidLoad, I do this:
usernameTextField.layer?.borderColor = NSColor.systemRed.cgColor
But the color doesn't change to red. Why is this? Thanks!

Answer 1

Try adding border width:
usernameTextField.layer?.borderWidth = 2
or don't add it in viewDidLoad() try adding it in viewWillLayoutSubviews()

Answer 2

Have no idea if this is helpful or not, but it will change a subclassed NSTextField's border color:
import Cocoa
var borderColor = NSColor()
class TextField: NSTextField {
override func draw(_ rect: NSRect) {
super.draw(rect)
let border = NSBezierPath(rect: bounds)
borderColor.set()
border.lineWidth = 2.0
border.stroke()
}
#objc func changeBorderColor(_ sender: AnyObject ) {
borderColor = .red
self.needsDisplay = true
}
}
let txtFld = TextField()
class ApplicationDelegate: NSObject, NSApplicationDelegate {
var window: NSWindow!
func buildMenu() {
let mainMenu = NSMenu()
NSApp.mainMenu = mainMenu
// **** App menu **** //
let appMenuItem = NSMenuItem()
mainMenu.addItem(appMenuItem)
let appMenu = NSMenu()
appMenuItem.submenu = appMenu
appMenu.addItem(withTitle: "Quit", action:#selector(NSApplication.terminate), keyEquivalent: "q")
}
func buildWnd() {
let _wndW:CGFloat = 400
let _wndH:CGFloat = 200
window = NSWindow(contentRect: NSMakeRect( 0, 0, _wndW, _wndH ), styleMask: [.titled, .closable, .miniaturizable], backing: .buffered, defer: false)
window.center()
window.title = "Swift Test Window"
window.makeKeyAndOrderFront(nil)
// === Text Field === //
let txtFld = TextField (frame:NSMakeRect( 60, 60, 180, 24 ))
window.contentView!.addSubview(txtFld)
txtFld.stringValue = "Text"
borderColor = .green
// === Button === //
let myBtn = NSButton (frame:NSMakeRect( 150, 100, 135, 30 ))
myBtn.bezelStyle = .rounded
myBtn.title = "Change Border"
myBtn.target = txtFld
myBtn.action = #selector(txtFld.changeBorderColor(_:))
window.contentView!.addSubview (myBtn)
// === Quit btn === //
let quitBtn = NSButton (frame:NSMakeRect( _wndW - 50, 5, 40, 40 ))
quitBtn.bezelStyle = .circular
quitBtn.title = "Q"
quitBtn.action = #selector(NSApplication.terminate)
window.contentView!.addSubview(quitBtn)
}
func applicationDidFinishLaunching(_ notification: Notification) {
buildMenu()
buildWnd()
}
func applicationShouldTerminateAfterLastWindowClosed(_ sender: NSApplication) -> Bool {
return true
}
}
let appDelegate = ApplicationDelegate()
// **** main.swift **** //
let application = NSApplication.shared
application.setActivationPolicy(.regular)
application.delegate = appDelegate
application.activate(ignoringOtherApps:true)
application.run()