Get X, Y position of value on UISlider

Question

I am trying to get the X,Y position of a particular value on a UISlider track so I can place a textfield at that location before I even move the slider with my thumb. I want to be able to place multiple textfields along the track showing what value is at that location.

Could anybody help me achieve this?

Thank you

Answer 1

let values: [Float] = [15, 30, 50, 70, 85]

for value in values {
    guard (slider.minimumValue...slider.maximumValue).contains(value) else { continue }

    let label = UILabel()
    label.text = "\(value)"

    view.addSubview(label)
    label.translatesAutoresizingMaskIntoConstraints = false

    let thumbRect = slider.thumbRect(forBounds: slider.bounds,
                                     trackRect: slider.trackRect(forBounds: slider.bounds),
                                     value: value)

    let convertedThumbRect = slider.convert(thumbRect, to: view)

    NSLayoutConstraint.activate([
        label.centerXAnchor.constraint(equalTo: view.leadingAnchor, constant: convertedThumbRect.midX),
        slider.topAnchor.constraintEqualToSystemSpacingBelow(label.bottomAnchor, multiplier: 1)
    ])
}