Resize Image in stackView, keep aspect-ratio - swift

Question

I want to clone the Apple Maps App UIButtons, they look like this:
This is my Code:
class CustomView: UIImageView {
init(frame: CGRect, corners: CACornerMask, systemName: String) {
super.init(frame: frame)
self.createBorders(corners: corners)
self.createImage(systemName: systemName)
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
func createBorders(corners: CACornerMask) {
self.contentMode = .scaleAspectFill
self.clipsToBounds = false
self.layer.cornerRadius = 10
self.layer.maskedCorners = corners
self.layer.masksToBounds = false
self.layer.shadowOffset = .zero
self.layer.shadowColor = UIColor.gray.cgColor
self.layer.shadowRadius = 10
self.layer.shadowOpacity = 0.2
self.backgroundColor = .white
let shadowAmount: CGFloat = 2
let rect = CGRect(x: 0, y: 2, width: self.bounds.width + shadowAmount * 0.1, height: self.bounds.height + shadowAmount * 0.1)
self.layer.shadowPath = UIBezierPath(rect: rect).cgPath
}
func createImage(systemName: String) {
let image = UIImage(systemName: systemName)!
// let renderer = UIGraphicsImageRenderer(bounds: self.frame)
// let renderedImage = renderer.image { (_) in
// image.draw(in: frame.insetBy(dx: 16, dy: 30))
// }
// self.image = renderedImage.withRenderingMode(.alwaysTemplate)
self.image = image
}
}
And used it like this:
let size = CGSize(width: 10, height: 10)
let frame = CGRect(origin: CGPoint(x: 360, y: 45), size: size)
let infoView = CustomView(frame: frame, corners: [.layerMinXMinYCorner, .layerMaxXMinYCorner], systemName: "info.circle")
let locationView = CustomView(frame: frame, corners: [], systemName: "location")
let plusView = CustomView(frame: frame, corners: [.layerMinXMaxYCorner, .layerMaxXMaxYCorner], systemName: "plus.circle")
let binocularsView = CustomView(frame: frame, corners: [.layerMinXMinYCorner, .layerMinXMaxYCorner, .layerMaxXMinYCorner, .layerMaxXMaxYCorner], systemName: "binoculars.fill")
let stackView = UIStackView(arrangedSubviews: [infoView, locationView, plusView, binocularsView])
stackView.frame = CGRect(origin: CGPoint(x: 360, y: 45), size: CGSize(width: 45, height: 180))
stackView.distribution = .fillEqually
stackView.axis = .vertical
stackView.setCustomSpacing(3, after: plusView)
view.addSubview(stackView)
With this code, it looks like this:
As you can see, the icons are too big... So this is what I tried to shrink them: (uncommented the lines in createImage())
func createImage(systemName: String) {
let image = UIImage(systemName: systemName)!
let renderer = UIGraphicsImageRenderer(bounds: self.frame)
let renderedImage = renderer.image { (_) in
image.draw(in: frame.insetBy(dx: 16, dy: 30))
}
self.image = renderedImage.withRenderingMode(.alwaysTemplate)
}
But then its distorted...
Does can help me? :)
Thank you!!!!

Answer 1

Rather than subclassing UIImageView subclass UIView and add a UIImageView as a subview. Then you can create as much spacing around the image as you want.
class CustomView: UIView {
lazy var imageView: UIImageView = {
let imageView = UIImageView()
imageView.translatesAutoresizingMaskIntoConstraints = false
return imageView
}()
init(frame: CGRect, corners: CACornerMask, systemName: String) {
super.init(frame: frame)
self.setUpViews()
// ...
}
func setUpViews() {
addSubview(imageView)
NSLayoutConstraint.activate([
imageView.leadingAnchor.constraint(equalTo: leadingAnchor, constant: 5),
imageView.trailingAnchor.constraint(equalTo: trailingAnchor, constant: -5),
imageView.topAnchor.constraint(equalTo: topAnchor, constant: 5),
imageView.bottomAnchor.constraint(equalTo: bottomAnchor, constant: -5),
])
}
func createImage(systemName: String) {
let image = UIImage(systemName: systemName)!
self.imageView.image = image
}
}