Slider with custom thumb image and text - swift

Question

Hy,
I'm trying to customize a slider by changing the thumb image and add a label over the picture.
For this, in my view in I set the image for slider thumb:
class SliderView: NibLoadingView {
#IBOutlet weak var slider: ThumbTextSlider!
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
contentView = legacyLoadXib()
setup()
}
override func setup() {
super.setup()
self.slider.setThumbImage(UIImage(named: "onb_cc_slider_thumb")!, for: .normal)
self.slider.thumbTextLabel.font = UIFont(name: Fonts.SanFranciscoDisplayRegular, size: 14)
}
}
In ThumbTextSlider class I set the text label as below:
class ThumbTextSlider: UISlider {
var thumbTextLabel: UILabel = UILabel()
private var thumbFrame: CGRect {
return thumbRect(forBounds: bounds, trackRect: trackRect(forBounds: bounds), value: value)
}
override func layoutSubviews() {
super.layoutSubviews()
thumbTextLabel.frame = thumbFrame
}
override func awakeFromNib() {
super.awakeFromNib()
addSubview(thumbTextLabel)
thumbTextLabel.layer.zPosition = layer.zPosition + 1
}
}
When I made test the result was a little different.
How, can I fix the issue ?
The expected result:
Kind regards

Answer 1

This class may help you. In class instead of image I created image you can replace with you thumb image.
class ThumbTextSlider: UISlider {
private var thumbTextLabel: UILabel = UILabel()
private var thumbFrame: CGRect {
return thumbRect(forBounds: bounds, trackRect: trackRect(forBounds: bounds), value: value)
}
private lazy var thumbView: UIView = {
let thumb = UIView()
return thumb
}()
override func layoutSubviews() {
super.layoutSubviews()
thumbTextLabel.frame = CGRect(x: thumbFrame.origin.x, y: thumbFrame.origin.y, width: thumbFrame.size.width, height: thumbFrame.size.height)
self.setValue()
}
private func setValue() {
thumbTextLabel.text = self.value.description
}
override func awakeFromNib() {
super.awakeFromNib()
addSubview(thumbTextLabel)
thumbTextLabel.textAlignment = .center
thumbTextLabel.textColor = .blue
thumbTextLabel.adjustsFontSizeToFitWidth = true
thumbTextLabel.layer.zPosition = layer.zPosition + 1
let thumb = thumbImage()
setThumbImage(thumb, for: .normal)
}
private func thumbImage() -> UIImage {
let width = 100
thumbView.frame = CGRect(x: 0, y: 15, width: width, height: 30)
thumbView.layer.cornerRadius = 15
let renderer = UIGraphicsImageRenderer(bounds: thumbView.bounds)
return renderer.image { rendererContext in
rendererContext.cgContext.setShadow(offset: .zero, blur: 5, color: UIColor.black.cgColor)
thumbView.backgroundColor = .red
thumbView.layer.render(in: rendererContext.cgContext)
}
}
override func trackRect(forBounds bounds: CGRect) -> CGRect {
return CGRect(origin: bounds.origin, size: CGSize(width: bounds.width, height: 5))
}
}