xcode Interface Builder not updating IBDesignable class - ios

Question

In my project, I have several custom class files based on UITextField and UIButton.
As an example, the UITextField class looks like this:
import UIKit
#IBDesignable class RoundedTextField: UITextField {
override func awakeFromNib() {
super.awakeFromNib()
layer.cornerRadius = 25
layer.borderWidth = 2
layer.borderColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
clipsToBounds = true
textColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
// Placeholder colour
attributedPlaceholder = NSAttributedString(string: placeholder!, attributes: [NSAttributedStringKey.foregroundColor: #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)])
}
// Placeholder text indent
override func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: 20, dy: 5)
}
// Editing text indent
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: 20, dy: 5)
}
}
Here is the correct version that the simulator shows me:
SimScreenshot
Here is what IB shows me:
IBScreenshot
As you can see from my IB screenshot, the only element that updates is the indentation of the placeholder text. The rest of the customisation from the class is not updating.
Any thoughts?
P.s. when I select an element, in the identity inspector, the 'Designables' field is "Up to date".
I have tried cleaning, building and restarting Xcode.
Thanks!
Scott

Answer 1

I solved the issue with help from Reinier's 2nd link and a course I previously took on Udemy.
I implemented my customisation in a setupView() function. I called this in prepareForInterfaceBuilder() and also awakeFromNib()
import UIKit
#IBDesignable class RoundedTextField: UITextField {
override func awakeFromNib() {
super.awakeFromNib()
setupView()
}
override func prepareForInterfaceBuilder() {
super.prepareForInterfaceBuilder()
self.setupView()
}
// Placeholder text indent
override func textRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: 20, dy: 5)
}
// Editing text indent
override func editingRect(forBounds bounds: CGRect) -> CGRect {
return bounds.insetBy(dx: 20, dy: 5)
}
func setupView() {
layer.cornerRadius = 25
layer.borderWidth = 2
layer.borderColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
clipsToBounds = true
textColor = #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)
// Placeholder colour
attributedPlaceholder = NSAttributedString(string: placeholder!, attributes: [NSAttributedStringKey.foregroundColor: #colorLiteral(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0)])
}
}

Answer 2

//It will update both Simulator and InterfaceBuilder
import UIKit
#IBDesignable class ViewExtended: UIView {
override func prepareForInterfaceBuilder() {
super.prepareForInterfaceBuilder()
setupView()
}
func setupView() {
layer.borderColor = borderColor.cgColor
layer.borderWidth = borderWidth
layer.cornerRadius = cornerRadius
layer.shadowOpacity = shadowOpacity
layer.shadowRadius = shadowRadius
}
override func awakeFromNib() {
super.awakeFromNib()
setupView()
}
#IBInspectable var borderColor: UIColor = UIColor.red {
didSet {
layer.borderColor = borderColor.cgColor
setNeedsLayout()
}
}
#IBInspectable var borderWidth: CGFloat = 1.0 {
didSet {
layer.borderWidth = borderWidth
setNeedsLayout()
}
}
#IBInspectable var cornerRadius: CGFloat = 10.0 {
didSet {
layer.cornerRadius = cornerRadius
setNeedsLayout()
}
}
#IBInspectable var shadowColor: UIColor = UIColor.black {
didSet {
layer.borderColor = borderColor.cgColor
setNeedsLayout()
}
}
#IBInspectable var shadowOpacity: Float = 0.7 {
didSet {
layer.shadowOpacity = shadowOpacity
setNeedsLayout()
}
}
#IBInspectable var shadowRadius: CGFloat = 4.0 {
didSet {
layer.shadowRadius = shadowRadius
setNeedsLayout()
}
}
#IBInspectable var shadowOffset: CGSize = CGSize(width: 3, height: 3) {
didSet {
layer.shadowOffset = shadowOffset
setNeedsLayout()
}
}
}