saccessibility7.swift

saccessibility7.swift

import UIKit

class BarChartView: UIView {
    private enum Layout {
        static let barWidth: CGFloat = 30
        static let maxHeightRatio: CGFloat = 0.8
    }

    var values: [Double] = [] {
        didSet {
            setNeedsLayout()
        }
    }

    override func layoutSubviews() {
        super.layoutSubviews()
        guard let max = values.max() else { return }
        subviews.forEach { $0.removeFromSuperview() }
        var x: CGFloat = Layout.barWidth
        let maxHeight: CGFloat = bounds.height * Layout.maxHeightRatio

        values.forEach { value in
            let height = CGFloat(value / max) * maxHeight
            let y = bounds.height - height - safeAreaInsets.bottom
            let frame = CGRect(x: x, y: y, width: Layout.barWidth, height: height)
            let bar = UIView(frame: frame)
            bar.backgroundColor = .gray
            addSubview(bar)
            x = bar.frame.maxX + Layout.barWidth / 2
        }
    }
}