How to add gradients on custom class buttons? - ios

Question

I am beginner in Swift/Xcode. I made a custom class in my Xcode project to handle buttons appearance (color, shape etc) that works find.
However, I can't succeed to add gradients to these buttons.
I tried the below code, but it adds a new squared gradient onto my rounded buttons instead of applying the intended gradients to those buttons. Here is what I already gave many tries:
- add this code to my custom button class (inheriting from UIButton)
- add this code to my custom button class (inheriting from UIView)
- above 2 approaches and removing the backgroungColor settings
- Using a separate function called from viewController
func ConfigMenuButtons() {
// Set button shape color
layer.cornerRadius = 37
// Set button size
translatesAutoresizingMaskIntoConstraints = false
widthAnchor.constraint(equalToConstant: 74).isActive = true
heightAnchor.constraint(equalToConstant: 74).isActive = true
// Set button text
setTitleColor(.white, for: .normal)
titleLabel?.font = UIFont.boldSystemFont(ofSize: 15)
// Set button shadow
layer.shadowRadius = 2
layer.shadowColor = UIColor.black.cgColor
layer.shadowOffset = CGSize(width: 0, height: 2)
layer.shadowOpacity = 0.8
// Set button gradient colors
let lightBlue = UIColor(red: 122/255, green: 127/255, blue: 249/255, alpha: 1)
let darkBlue = UIColor(red: 74/255, green: 88/255, blue: 205/255, alpha: 1)
// Set gradients
let gradientLayer = CAGradientLayer()
gradientLayer.frame = bounds
gradientLayer.colors = [lightBlue.cgColor, darkBlue.cgColor]
gradientLayer.locations = [0.0,1.0]
gradientLayer.startPoint = CGPoint(x: 0.0, y: 0.0)
gradientLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
clipsToBounds = true
// insert gradients to button
layer.insertSublayer(gradientLayer, at: 0)
}
But I always end up with this "square shaped gradient layer" appearing onto the targeted buttons, instead of having these gradients applied directly to these buttons.
If someone had any piece of advice, it would be fantastic.
Thank you!
Here is the screen shot of the button with its partial expected effect

Answer 1

Here is a screenshot of fixed issue
I finally fixed the issue as below adding a CGRect size.
func ConfigMenuButtons() {
// Set button shape
layer.cornerRadius = 37
// Set button size
translatesAutoresizingMaskIntoConstraints = false
widthAnchor.constraint(equalToConstant: 74).isActive = true
heightAnchor.constraint(equalToConstant: 74).isActive = true
// Set button text
setTitleColor(.white, for: .normal)
titleLabel?.font = UIFont.boldSystemFont(ofSize: 15)
// Set button shadow
layer.shadowRadius = 2
layer.shadowColor = UIColor.black.cgColor
layer.shadowOffset = CGSize(width: 0, height: 2)
layer.shadowOpacity = 0.8
// Set button gradient colors
let lightBlue = UIColor(red: 112/255, green: 117/255, blue: 239/255, alpha: 1)
let darkBlue = UIColor(red: 70/255, green: 84/255, blue: 201/255, alpha: 1)
// Set gradients
let gradientLayer = CAGradientLayer()
gradientLayer.frame = bounds
gradientLayer.colors = [lightBlue.cgColor, darkBlue.cgColor]
gradientLayer.locations = [0.0,1.0]
gradientLayer.startPoint = CGPoint(x: 1.0, y: 0.5)
gradientLayer.endPoint = CGPoint(x: 1.0, y: 1.0)
// THAT IS THE LINE THAT COULD FIX THE ISSUE
gradientLayer.frame = CGRect(x: 0, y: 0, width: 74, height: 74)
// Set rounded shape
gradientLayer.cornerRadius = 37
// insert gradients to button
layer.insertSublayer(gradientLayer, at: 0)
}