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Add support for swift 5 #42

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Add support for swift 5 #42

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4 changes: 2 additions & 2 deletions TwicketSegmentedControl/Palette.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -13,12 +13,12 @@ struct Palette {
static let highlightTextColor = UIColor.white
static let segmentedControlBackgroundColor = Palette.colorFromRGB(237, green: 242, blue: 247, alpha: 0.7)
static let sliderColor = Palette.colorFromRGB(44, green: 131, blue: 255)

static func colorFromRGB(_ red: CGFloat, green: CGFloat, blue: CGFloat, alpha: CGFloat = 1.0) -> UIColor {
func amount(_ amount: CGFloat, with alpha: CGFloat) -> CGFloat {
return (1 - alpha) * 255 + alpha * amount
}

let red = amount(red, with: alpha)/255
let green = amount(green, with: alpha)/255
let blue = amount(blue, with: alpha)/255
Expand Down
114 changes: 58 additions & 56 deletions TwicketSegmentedControl/TwicketSegmentedControl.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -13,153 +13,153 @@ public protocol TwicketSegmentedControlDelegate: class {
}

open class TwicketSegmentedControl: UIControl {
open static let height: CGFloat = Constants.height + Constants.topBottomMargin * 2

public static let height: CGFloat = Constants.height + Constants.topBottomMargin * 2
private struct Constants {
static let height: CGFloat = 30
static let topBottomMargin: CGFloat = 5
static let leadingTrailingMargin: CGFloat = 10
}

class SliderView: UIView {
// MARK: - Properties
fileprivate let sliderMaskView = UIView()

var cornerRadius: CGFloat! {
didSet {
layer.cornerRadius = cornerRadius
sliderMaskView.layer.cornerRadius = cornerRadius
}
}

override var frame: CGRect {
didSet {
sliderMaskView.frame = frame
}
}

override var center: CGPoint {
didSet {
sliderMaskView.center = center
}
}

init() {
super.init(frame: .zero)
setup()
}

required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}

private func setup() {
layer.masksToBounds = true
sliderMaskView.backgroundColor = .black
sliderMaskView.addShadow(with: .black)
}
}

open weak var delegate: TwicketSegmentedControlDelegate?

open var defaultTextColor: UIColor = Palette.defaultTextColor {
didSet {
updateLabelsColor(with: defaultTextColor, selected: false)
}
}

open var highlightTextColor: UIColor = Palette.highlightTextColor {
didSet {
updateLabelsColor(with: highlightTextColor, selected: true)
}
}

open var segmentsBackgroundColor: UIColor = Palette.segmentedControlBackgroundColor {
didSet {
backgroundView.backgroundColor = segmentsBackgroundColor
}
}

open var sliderBackgroundColor: UIColor = Palette.sliderColor {
didSet {
selectedContainerView.backgroundColor = sliderBackgroundColor
if !isSliderShadowHidden { selectedContainerView.addShadow(with: sliderBackgroundColor) }
}
}

open var font: UIFont = UIFont.systemFont(ofSize: 15, weight: UIFontWeightMedium) {
open var font: UIFont = UIFont.systemFont(ofSize: 15, weight: UIFont.Weight.medium) {
didSet {
updateLabelsFont(with: font)
}
}

open var isSliderShadowHidden: Bool = false {
didSet {
updateShadow(with: sliderBackgroundColor, hidden: isSliderShadowHidden)
}
}

private(set) open var selectedSegmentIndex: Int = 0

private var segments: [String] = []

private var numberOfSegments: Int {
return segments.count
}

private var segmentWidth: CGFloat {
return self.backgroundView.frame.width / CGFloat(numberOfSegments)
}

private var correction: CGFloat = 0

private lazy var containerView: UIView = UIView()
private lazy var backgroundView: UIView = UIView()
private lazy var selectedContainerView: UIView = UIView()
private lazy var sliderView: SliderView = SliderView()

public override init(frame: CGRect) {
super.init(frame: frame)
setup()
}

public required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
setup()
}

// MARK: Setup

private func setup() {
addSubview(containerView)
containerView.addSubview(backgroundView)
containerView.addSubview(selectedContainerView)
containerView.addSubview(sliderView)

selectedContainerView.layer.mask = sliderView.sliderMaskView.layer
addTapGesture()
addDragGesture()
}

open func setSegmentItems(_ segments: [String]) {
guard !segments.isEmpty else { fatalError("Segments array cannot be empty") }

self.segments = segments
configureViews()

clearLabels()

for (index, title) in segments.enumerated() {
let baseLabel = createLabel(with: title, at: index, selected: false)
let selectedLabel = createLabel(with: title, at: index, selected: true)
backgroundView.addSubview(baseLabel)
selectedContainerView.addSubview(selectedLabel)
}

setupAutoresizingMasks()
}

private func configureViews() {
containerView.frame = CGRect(x: Constants.leadingTrailingMargin,
y: Constants.topBottomMargin,
Expand All @@ -169,27 +169,27 @@ open class TwicketSegmentedControl: UIControl {
backgroundView.frame = frame
selectedContainerView.frame = frame
sliderView.frame = CGRect(x: 0, y: 0, width: segmentWidth, height: backgroundView.frame.height)

let cornerRadius = backgroundView.frame.height / 2
[backgroundView, selectedContainerView].forEach { $0.layer.cornerRadius = cornerRadius }
sliderView.cornerRadius = cornerRadius

backgroundColor = .white
backgroundView.backgroundColor = segmentsBackgroundColor
selectedContainerView.backgroundColor = sliderBackgroundColor

if !isSliderShadowHidden {
selectedContainerView.addShadow(with: sliderBackgroundColor)
}
}

private func setupAutoresizingMasks() {
containerView.autoresizingMask = [.flexibleWidth]
backgroundView.autoresizingMask = [.flexibleWidth]
selectedContainerView.autoresizingMask = [.flexibleWidth]
sliderView.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin, .flexibleWidth]
}

private func updateShadow(with color: UIColor, hidden: Bool) {
if hidden {
selectedContainerView.removeShadow()
Expand All @@ -199,14 +199,14 @@ open class TwicketSegmentedControl: UIControl {
sliderView.sliderMaskView.addShadow(with: .black)
}
}

// MARK: Labels

private func clearLabels() {
backgroundView.subviews.forEach { $0.removeFromSuperview() }
selectedContainerView.subviews.forEach { $0.removeFromSuperview() }
}

private func createLabel(with text: String, at index: Int, selected: Bool) -> UILabel {
let rect = CGRect(x: CGFloat(index) * segmentWidth, y: 0, width: segmentWidth, height: backgroundView.frame.height)
let label = UILabel(frame: rect)
Expand All @@ -217,33 +217,33 @@ open class TwicketSegmentedControl: UIControl {
label.autoresizingMask = [.flexibleLeftMargin, .flexibleRightMargin, .flexibleWidth]
return label
}

private func updateLabelsColor(with color: UIColor, selected: Bool) {
let containerView = selected ? selectedContainerView : backgroundView
containerView.subviews.forEach { ($0 as? UILabel)?.textColor = color }
}

private func updateLabelsFont(with font: UIFont) {
selectedContainerView.subviews.forEach { ($0 as? UILabel)?.font = font }
backgroundView.subviews.forEach { ($0 as? UILabel)?.font = font }
}

// MARK: Tap gestures

private func addTapGesture() {
let tap = UITapGestureRecognizer(target: self, action: #selector(didTap))
addGestureRecognizer(tap)
}

private func addDragGesture() {
let drag = UIPanGestureRecognizer(target: self, action: #selector(didPan))
sliderView.addGestureRecognizer(drag)
}

@objc private func didTap(tapGesture: UITapGestureRecognizer) {
moveToNearestPoint(basedOn: tapGesture)
}

@objc private func didPan(panGesture: UIPanGestureRecognizer) {
switch panGesture.state {
case .cancelled, .ended, .failed:
Expand All @@ -254,11 +254,13 @@ open class TwicketSegmentedControl: UIControl {
let location = panGesture.location(in: self)
sliderView.center.x = location.x - correction
case .possible: ()
@unknown default:
break
}
}

// MARK: Slider position

private func moveToNearestPoint(basedOn gesture: UIGestureRecognizer, velocity: CGPoint? = nil) {
var location = gesture.location(in: self)
if let velocity = velocity {
Expand All @@ -269,26 +271,26 @@ open class TwicketSegmentedControl: UIControl {
move(to: index)
delegate?.didSelect(index)
}

open func move(to index: Int) {
let correctOffset = center(at: index)
animate(to: correctOffset)

selectedSegmentIndex = index
}

private func segmentIndex(for point: CGPoint) -> Int {
var index = Int(point.x / sliderView.frame.width)
if index < 0 { index = 0 }
if index > numberOfSegments - 1 { index = numberOfSegments - 1 }
return index
}

private func center(at index: Int) -> CGFloat {
let xOffset = CGFloat(index) * sliderView.frame.width + sliderView.frame.width / 2
return xOffset
}

private func animate(to position: CGFloat) {
UIView.animate(withDuration: 0.2) {
self.sliderView.center.x = position
Expand Down
2 changes: 1 addition & 1 deletion TwicketSegmentedControl/UIViewShadowExtension.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -15,7 +15,7 @@ extension UIView {
layer.shadowOpacity = 0.7
layer.shadowOffset = CGSize(width: 0, height: 5)
}

func removeShadow() {
layer.shadowOpacity = 0
}
Expand Down
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