Gradient color for text to UITextView - swift

Question

I need to set gradient color with to colors into UITextView with white background color like in instagram stories. Example below:

Answer 1

Ignore the constraints set in the following code, but the concept should go like this:
containerView = GradientView.init()
self.view.addSubview(containerView)
containerView.translatesAutoresizingMaskIntoConstraints = false
containerView.centerXAnchor.constraint(equalTo: view.centerXAnchor, constant: 0).isActive = true
containerView.centerYAnchor.constraint(equalTo: view.centerYAnchor, constant: 0).isActive = true
containerView.widthAnchor.constraint(equalToConstant: 220).isActive = true
containerView.heightAnchor.constraint(equalToConstant: 50).isActive = true
containerView.backgroundColor = .white
textView = UITextView()
containerView.addSubview(textView)
textView.translatesAutoresizingMaskIntoConstraints = false
textView.leftAnchor.constraint(equalTo: containerView.leftAnchor, constant: 0).isActive = true
textView.rightAnchor.constraint(equalTo: containerView.rightAnchor, constant: 0).isActive = true
textView.topAnchor.constraint(equalTo: containerView.topAnchor, constant: 0).isActive = true
textView.bottomAnchor.constraint(equalTo: containerView.bottomAnchor, constant: 0).isActive = true
textView.text = "#SomeValue"
textView.font = UIFont.systemFont(ofSize: 22, weight: .bold)
containerView.layer.mask = textView.layer.sublayers?.last
where GradientView is a UIView subclass similar to :
class GradientView: UIView{
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
func addGradient(){
let gradient = CAGradientLayer()
gradient.frame = self.bounds
gradient.colors = [UIColor.blue.cgColor,UIColor.red.cgColor,UIColor.green.cgColor]
gradient.startPoint = CGPoint(x: 0, y: 1)
gradient.endPoint = CGPoint(x: 1, y: 0)
gradient.locations = [0,0.5,1]
self.layer.addSublayer(gradient)
}
}
Should look something like this. Maybe your gradient colours would look better.