62 lines
1.6 KiB
Swift
62 lines
1.6 KiB
Swift
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// TickMarkSlider.swift
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// NetNewsWire-iOS
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//
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// Created by Maurice Parker on 11/8/19.
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// Copyright © 2019 Ranchero Software. All rights reserved.
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//
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import UIKit
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class TickMarkSlider: UISlider {
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func addTickMarks() {
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let numberOfGaps = Int(maximumValue) - Int(minimumValue)
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var gapLayoutGuides = [UILayoutGuide]()
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for i in 0...numberOfGaps {
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let tick = UIView()
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tick.translatesAutoresizingMaskIntoConstraints = false
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tick.backgroundColor = AppAssets.tickMarkColor
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insertSubview(tick, belowSubview: self)
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tick.widthAnchor.constraint(equalToConstant: 3).isActive = true
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tick.heightAnchor.constraint(equalToConstant: 10).isActive = true
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tick.centerYAnchor.constraint(equalTo: self.centerYAnchor).isActive = true
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if i == 0 {
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tick.leadingAnchor.constraint(equalTo: leadingAnchor).isActive = true
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}
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if let lastGapLayoutGuild = gapLayoutGuides.last {
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lastGapLayoutGuild.trailingAnchor.constraint(equalTo: tick.leadingAnchor).isActive = true
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}
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if i != numberOfGaps {
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let gapLayoutGuild = UILayoutGuide()
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gapLayoutGuides.append(gapLayoutGuild)
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addLayoutGuide(gapLayoutGuild)
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tick.trailingAnchor.constraint(equalTo: gapLayoutGuild.leadingAnchor).isActive = true
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} else {
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tick.trailingAnchor.constraint(equalTo: trailingAnchor).isActive = true
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}
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}
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if let firstGapLayoutGuild = gapLayoutGuides.first {
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for i in 1..<gapLayoutGuides.count {
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gapLayoutGuides[i].widthAnchor.constraint(equalTo: firstGapLayoutGuild.widthAnchor).isActive = true
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}
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}
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}
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override func endTracking(_ touch: UITouch?, with event: UIEvent?) {
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value = value.rounded()
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}
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}
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