@@ -9,81 +9,50 @@
99import UIKit
1010
1111@IBDesignable public class GMStepper: UIControl {
12−
13− /// Current value of the stepper. Defaults to 0.
14− @objc @IBInspectable public var value: Double = 0 {
12+ public var value = 0 {
1513 didSet {
1614 value = min(maximumValue, max(minimumValue, value))
17−
18− let isInteger = floor(value) == value
19−
20− //
21− // If we have items, we will display them as steps
22− //
15+ label.text = String(value)
2316
24− if isInteger && stepValue == 1.0 && items.count > 0 {
25− label.text = items[Int(value)]
26− }
27− else if showIntegerIfDoubleIsInteger && isInteger {
28− label.text = String(stringInterpolationSegment: Int(value))
29− } else {
30− label.text = String(stringInterpolationSegment: value)
31− }
32−
3317 if oldValue != value {
34− sendActions(for: .valueChanged)
18+ sendActionsForControlEvents(.ValueChanged)
3519 }
3620 }
3721 }
38−
39− /// Minimum value. Must be less than maximumValue. Defaults to 0.
40− @objc @IBInspectable public var minimumValue: Double = 0 {
22+
23+ @IBInspectable public var minimumValue: Int = 0 {
4124 didSet {
42− value = min(maximumValue, max(minimumValue, value))
25+ value = 0
4326 }
4427 }
45−
46− /// Maximum value. Must be more than minimumValue. Defaults to 100.
47− @objc @IBInspectable public var maximumValue: Double = 100 {
28+
29+ @IBInspectable public var maximumValue: Int = 10 {
4830 didSet {
49− value = min(maximumValue, max(minimumValue, value))
31+ value = 0
5032 }
5133 }
52−
53− /// Step/Increment value as in UIStepper. Defaults to 1.
54− @objc @IBInspectable public var stepValue: Double = 1
55−
56− /// The same as UIStepper's autorepeat. If true, holding on the buttons or keeping the pan gesture alters the value repeatedly. Defaults to true.
57− @objc @IBInspectable public var autorepeat: Bool = true
58−
59− /// If the value is integer, it is shown without floating point.
60− @objc @IBInspectable public var showIntegerIfDoubleIsInteger: Bool = true
61−
62− /// Text on the left button. Be sure that it fits in the button. Defaults to "−".
63− @objc @IBInspectable public var leftButtonText: String = "−" {
34+
35+ @IBInspectable public var leftButtonText: String = "-" {
6436 didSet {
65− leftButton.setTitle(leftButtonText, for: .normal)
37+ leftButton.setTitle(leftButtonText, forState: .Normal)
6638 }
6739 }
68−
69− /// Text on the right button. Be sure that it fits in the button. Defaults to "+".
70− @objc @IBInspectable public var rightButtonText: String = "+" {
40+
41+ @IBInspectable public var rightButtonText: String = "+" {
7142 didSet {
72− rightButton.setTitle(rightButtonText, for: .normal)
43+ rightButton.setTitle(rightButtonText, forState: .Normal)
7344 }
7445 }
75−
76− /// Text color of the buttons. Defaults to white.
77− @objc @IBInspectable public var buttonsTextColor: UIColor = UIColor.white {
46+
47+ @IBInspectable public var buttonsTextColor: UIColor = UIColor.whiteColor() {
7848 didSet {
7949 for button in [leftButton, rightButton] {
80− button.setTitleColor(buttonsTextColor, for: .normal)
50+ button.setTitleColor(buttonsTextColor, forState: .Normal)
8151 }
8252 }
8353 }
84−
85− /// Background color of the buttons. Defaults to dark blue.
86− @objc @IBInspectable public var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1) {
54+
55+ @IBInspectable public var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1) {
8756 didSet {
8857 for button in [leftButton, rightButton] {
8958 button.backgroundColor = buttonsBackgroundColor
@@ -91,431 +60,146 @@ import UIKit
9160 backgroundColor = buttonsBackgroundColor
9261 }
9362 }
94−
95− /// Font of the buttons. Defaults to AvenirNext-Bold, 20.0 points in size.
96− @objc public var buttonsFont = UIFont(name: "AvenirNext-Bold", size: 20.0)! {
63+
64+ public var buttonsFont = UIFont(name: "AvenirNext-Bold", size: 20.0)! {
9765 didSet {
9866 for button in [leftButton, rightButton] {
9967 button.titleLabel?.font = buttonsFont
10068 }
10169 }
10270 }
103−
104− /// Text color of the middle label. Defaults to white.
105− @objc @IBInspectable public var labelTextColor: UIColor = UIColor.white {
71+
72+ @IBInspectable public var labelTextColor: UIColor = UIColor.whiteColor() {
10673 didSet {
10774 label.textColor = labelTextColor
10875 }
10976 }
110−
111− /// Text color of the middle label. Defaults to lighter blue.
112− @objc @IBInspectable public var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1) {
77+
78+ @IBInspectable public var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1) {
11379 didSet {
11480 label.backgroundColor = labelBackgroundColor
11581 }
11682 }
11783
118− /// Font of the middle label. Defaults to AvenirNext-Bold, 25.0 points in size.
119− @objc public var labelFont = UIFont(name: "AvenirNext-Bold", size: 25.0)! {
84+ public var labelFont = UIFont(name: "AvenirNext-Bold", size: 25.0)! {
12085 didSet {
12186 label.font = labelFont
12287 }
12388 }
124− /// Corner radius of the middle label. Defaults to 0.
125− @objc @IBInspectable public var labelCornerRadius: CGFloat = 0 {
126− didSet {
127− label.layer.cornerRadius = labelCornerRadius
128−
129− }
130− }
131−
132− /// Corner radius of the stepper's layer. Defaults to 4.0.
133− @objc @IBInspectable public var cornerRadius: CGFloat = 4.0 {
89+
90+ @IBInspectable public var cornerRadius: CGFloat = 4.0 {
13491 didSet {
13592 layer.cornerRadius = cornerRadius
13693 clipsToBounds = true
13794 }
13895 }
13996
140− /// Border width of the stepper and middle label's layer. Defaults to 0.0.
141− @objc @IBInspectable public var borderWidth: CGFloat = 0.0 {
142− didSet {
143− layer.borderWidth = borderWidth
144− label.layer.borderWidth = borderWidth
145− }
146− }
147−
148− /// Color of the border of the stepper and middle label's layer. Defaults to clear color.
149− @objc @IBInspectable public var borderColor: UIColor = UIColor.clear {
150− didSet {
151− layer.borderColor = borderColor.cgColor
152− label.layer.borderColor = borderColor.cgColor
153− }
154− }
155−
156− /// Percentage of the middle label's width. Must be between 0 and 1. Defaults to 0.5. Be sure that it is wide enough to show the value.
157− @objc @IBInspectable public var labelWidthWeight: CGFloat = 0.5 {
97+ @IBInspectable public var labelWidthWeight: CGFloat = 0.5 {
15898 didSet {
15999 labelWidthWeight = min(1, max(0, labelWidthWeight))
160100 setNeedsLayout()
161101 }
162102 }
163−
164− /// Color of the flashing animation on the buttons in case the value hit the limit.
165− @objc @IBInspectable public var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)
166−
167− /**
168− Width of the sliding animation. When buttons clicked, the middle label does a slide animation towards to the clicked button. Defaults to 5.
169− */
170− let labelSlideLength: CGFloat = 5
171−
172− /// Duration of the sliding animation
173− let labelSlideDuration = TimeInterval(0.1)
174−
175− /// Duration of the animation when the value hits the limit.
176− let limitHitAnimationDuration = TimeInterval(0.1)
177−
178− lazy var leftButton: UIButton = {
179− let button = UIButton()
180− button.setTitle(self.leftButtonText, for: .normal)
181− button.setTitleColor(self.buttonsTextColor, for: .normal)
182− button.backgroundColor = self.buttonsBackgroundColor
183− button.titleLabel?.font = self.buttonsFont
184− button.addTarget(self, action: #selector(GMStepper.leftButtonTouchDown), for: .touchDown)
185− button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpInside)
186− button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpOutside)
187− button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchCancel)
188− return button
189− }()
190−
191− lazy var rightButton: UIButton = {
192− let button = UIButton()
193− button.setTitle(self.rightButtonText, for: .normal)
194− button.setTitleColor(self.buttonsTextColor, for: .normal)
195− button.backgroundColor = self.buttonsBackgroundColor
196− button.titleLabel?.font = self.buttonsFont
197− button.addTarget(self, action: #selector(GMStepper.rightButtonTouchDown), for: .touchDown)
198− button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpInside)
199− button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchUpOutside)
200− button.addTarget(self, action: #selector(GMStepper.buttonTouchUp), for: .touchCancel)
201− return button
202− }()
203−
204− lazy var label: UILabel = {
205− let label = UILabel()
206− label.textAlignment = .center
207− if self.showIntegerIfDoubleIsInteger && floor(self.value) == self.value {
208− label.text = String(stringInterpolationSegment: Int(self.value))
209− } else {
210− label.text = String(stringInterpolationSegment: self.value)
211− }
212− label.textColor = self.labelTextColor
213− label.backgroundColor = self.labelBackgroundColor
214− label.font = self.labelFont
215− label.layer.cornerRadius = self.labelCornerRadius
216− label.layer.masksToBounds = true
217− label.isUserInteractionEnabled = true
218− let panRecognizer = UIPanGestureRecognizer(target: self, action: #selector(GMStepper.handlePan))
219− panRecognizer.maximumNumberOfTouches = 1
220− label.addGestureRecognizer(panRecognizer)
221− return label
222− }()
223−
224− var labelOriginalCenter: CGPoint!
225− var labelMaximumCenterX: CGFloat!
226− var labelMinimumCenterX: CGFloat!
227−
228− enum LabelPanState {
229− case Stable, HitRightEdge, HitLeftEdge
230− }
231− var panState = LabelPanState.Stable
232−
233− enum StepperState {
234− case Stable, ShouldIncrease, ShouldDecrease
235− }
236− var stepperState = StepperState.Stable {
237− didSet {
238− if stepperState != .Stable {
239− updateValue()
240− if autorepeat {
241− scheduleTimer()
242− }
243− }
244− }
245− }
246103
104+ private let labelSlideLength: CGFloat = 5
105+ private let labelSlideDuration: NSTimeInterval = 0.1
247106
248− @objc public var items : [String] = [] {
249− didSet {
250− let isInteger = floor(value) == value
251−
252− //
253− // If we have items, we will display them as steps
254− //
255−
256− if isInteger && stepValue == 1.0 && items.count > 0 {
257−
258− var value = Int(self.value)
259−
260− if value >= items.count {
261− value = items.count - 1
262− self.value = Double(value)
263− }
264− else {
265− label.text = items[value]
266− }
267− }
268− }
269− }
270−
271− /// Timer used for autorepeat option
272− var timer: Timer?
273−
274− /** When UIStepper reaches its top speed, it alters the value with a time interval of ~0.05 sec.
275− The user pressing and holding on the stepper repeatedly:
276− - First 2.5 sec, the stepper changes the value every 0.5 sec.
277− - For the next 1.5 sec, it changes the value every 0.1 sec.
278− - Then, every 0.05 sec.
279− */
280− let timerInterval = TimeInterval(0.05)
281−
282− /// Check the handleTimerFire: function. While it is counting the number of fires, it decreases the mod value so that the value is altered more frequently.
283− var timerFireCount = 0
284− var timerFireCountModulo: Int {
285− if timerFireCount > 80 {
286− return 1 // 0.05 sec * 1 = 0.05 sec
287− } else if timerFireCount > 50 {
288− return 2 // 0.05 sec * 2 = 0.1 sec
289− } else {
290− return 10 // 0.05 sec * 10 = 0.5 sec
291− }
292− }
293−
294− @objc required public init?(coder aDecoder: NSCoder) {
107+ private let limitHitAnimationDuration: NSTimeInterval = 0.1
108+ @IBInspectable public var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)
109+
110+ private let leftButton = UIButton()
111+ private let rightButton = UIButton()
112+ private let label = UILabel()
113+
114+ required public init(coder aDecoder: NSCoder) {
295115 super.init(coder: aDecoder)
296116 setup()
297117 }
298−
299− @objc public override init(frame: CGRect) {
118+
119+ public override init(frame: CGRect) {
300120 super.init(frame: frame)
301121 setup()
302122 }
303−
304− func setup() {
123+
124+ private func setup() {
125+ leftButton.setTitle(leftButtonText, forState: .Normal)
126+ leftButton.setTitleColor(buttonsTextColor, forState: .Normal)
127+ leftButton.backgroundColor = buttonsBackgroundColor
128+ leftButton.titleLabel?.font = buttonsFont
129+ leftButton.addTarget(self, action: "leftButtonTapped:", forControlEvents: .TouchDown)
305130 addSubview(leftButton)
131+
132+ rightButton.setTitle(rightButtonText, forState: .Normal)
133+ rightButton.setTitleColor(buttonsTextColor, forState: .Normal)
134+ rightButton.backgroundColor = buttonsBackgroundColor
135+ rightButton.titleLabel?.font = buttonsFont
136+ rightButton.addTarget(self, action: "rightButtonTapped:", forControlEvents: .TouchDown)
306137 addSubview(rightButton)
138+
139+ label.textAlignment = .Center
140+ label.text = String(value)
141+ label.textColor = labelTextColor
142+ label.backgroundColor = labelBackgroundColor
143+ label.font = labelFont
307144 addSubview(label)
308−
145+
309146 backgroundColor = buttonsBackgroundColor
310147 layer.cornerRadius = cornerRadius
311148 clipsToBounds = true
312− labelOriginalCenter = label.center
313−
314− NotificationCenter.default.addObserver(self, selector: #selector(GMStepper.reset), name: NSNotification.Name.UIApplicationWillResignActive, object: nil)
315149 }
316−
150+
317151 public override func layoutSubviews() {
318152 let buttonWidth = bounds.size.width * ((1 - labelWidthWeight) / 2)
319153 let labelWidth = bounds.size.width * labelWidthWeight
320−
154+
321155 leftButton.frame = CGRect(x: 0, y: 0, width: buttonWidth, height: bounds.size.height)
322156 label.frame = CGRect(x: buttonWidth, y: 0, width: labelWidth, height: bounds.size.height)
323157 rightButton.frame = CGRect(x: labelWidth + buttonWidth, y: 0, width: buttonWidth, height: bounds.size.height)
324−
325− labelMaximumCenterX = label.center.x + labelSlideLength
326− labelMinimumCenterX = label.center.x - labelSlideLength
327− labelOriginalCenter = label.center
328− }
329−
330− func updateValue() {
331− if stepperState == .ShouldIncrease {
332− value += stepValue
333− } else if stepperState == .ShouldDecrease {
334− value -= stepValue
335− }
336158 }
337−
338− deinit {
339− resetTimer()
340− NotificationCenter.default.removeObserver(self)
341− }
342−
343− /// Useful closure for logging the timer interval. You can call this in the timer handler to test the autorepeat option. Not used in the current implementation.
344−// lazy var printTimerGaps: () -> () = {
345−// var prevTime: CFAbsoluteTime?
346−//
347−// return { _ in
348−// var now = CFAbsoluteTimeGetCurrent()
349−// if let prevTime = prevTime {
350−// print(now - prevTime)
351−// }
352−// prevTime = now
353−// }
354−// }()
355−}
356−
357−// MARK: Pan Gesture
358−extension GMStepper {
359− @objc func handlePan(gesture: UIPanGestureRecognizer) {
360− switch gesture.state {
361− case .began:
362− leftButton.isEnabled = false
363− rightButton.isEnabled = false
364− case .changed:
365− let translation = gesture.translation(in: label)
366− gesture.setTranslation(CGPoint.zero, in: label)
367−
368− let slidingRight = gesture.velocity(in: label).x > 0
369− let slidingLeft = gesture.velocity(in: label).x < 0
370−
371− // Move the label with pan
372− if slidingRight {
373− label.center.x = min(labelMaximumCenterX, label.center.x + translation.x)
374− } else if slidingLeft {
375− label.center.x = max(labelMinimumCenterX, label.center.x + translation.x)
376− }
377−
378− // When the label hits the edges, increase/decrease value and change button backgrounds
379− if label.center.x == labelMaximumCenterX {
380− // If not hit the right edge before, increase the value and start the timer. If already hit the edge, do nothing. Timer will handle it.
381− if panState != .HitRightEdge {
382− stepperState = .ShouldIncrease
383− panState = .HitRightEdge
384− }
385−
386− animateLimitHitIfNeeded()
387− } else if label.center.x == labelMinimumCenterX {
388− if panState != .HitLeftEdge {
389− stepperState = .ShouldDecrease
390− panState = .HitLeftEdge
391− }
392−
393− animateLimitHitIfNeeded()
394− } else {
395− panState = .Stable
396− stepperState = .Stable
397− resetTimer()
398−
399− self.rightButton.backgroundColor = self.buttonsBackgroundColor
400− self.leftButton.backgroundColor = self.buttonsBackgroundColor
401− }
402− case .ended, .cancelled, .failed:
403− reset()
404− default:
405− break
406− }
407− }
408−
409− @objc func reset() {
410− panState = .Stable
411− stepperState = .Stable
412− resetTimer()
413−
414− leftButton.isEnabled = true
415− rightButton.isEnabled = true
416− label.isUserInteractionEnabled = true
417−
418− UIView.animate(withDuration: self.labelSlideDuration, animations: {
419− self.label.center = self.labelOriginalCenter
420− self.rightButton.backgroundColor = self.buttonsBackgroundColor
421− self.leftButton.backgroundColor = self.buttonsBackgroundColor
422− })
423− }
424−}
425−
426−// MARK: Button Events
427−extension GMStepper {
428− @objc func leftButtonTouchDown(button: UIButton) {
429− rightButton.isEnabled = false
430− label.isUserInteractionEnabled = false
431− resetTimer()
432−
159+
160+ @objc private func leftButtonTapped(button: UIButton) {
433161 if value == minimumValue {
434− animateLimitHitIfNeeded()
162+ animateLimitHitForButton(leftButton)
435163 } else {
436− stepperState = .ShouldDecrease
164+ value -= 1
437165 animateSlideLeft()
438166 }
439−
440167 }
441168
442− @objc func rightButtonTouchDown(button: UIButton) {
443− leftButton.isEnabled = false
444− label.isUserInteractionEnabled = false
445− resetTimer()
446−
169+ @objc private func rightButtonTapped(button: UIButton) {
447170 if value == maximumValue {
448− animateLimitHitIfNeeded()
171+ animateLimitHitForButton(rightButton)
449172 } else {
450− stepperState = .ShouldIncrease
173+ value += 1
451174 animateSlideRight()
452175 }
453176 }
454−
455− @objc func buttonTouchUp(button: UIButton) {
456− reset()
457− }
458−}
459−
460−// MARK: Animations
461−extension GMStepper {
462−
463− func animateSlideLeft() {
464− UIView.animate(withDuration: labelSlideDuration) {
177+
178+ private func animateSlideLeft() {
179+ UIView.animateWithDuration(labelSlideDuration, animations: {
465180 self.label.center.x -= self.labelSlideLength
466− }
181+ }, completion: { _ in
182+ UIView.animateWithDuration(self.labelSlideDuration, animations: {
183+ self.label.center.x += self.labelSlideLength
184+ })
185+ })
467186 }
468−
469− func animateSlideRight() {
470− UIView.animate(withDuration: labelSlideDuration) {
187+
188+ private func animateSlideRight() {
189+ UIView.animateWithDuration(labelSlideDuration, animations: {
471190 self.label.center.x += self.labelSlideLength
472− }
473− }
474−
475− func animateToOriginalPosition() {
476− if self.label.center != self.labelOriginalCenter {
477− UIView.animate(withDuration: labelSlideDuration) {
478− self.label.center = self.labelOriginalCenter
479− }
480− }
481− }
482−
483− func animateLimitHitIfNeeded() {
484− if value == minimumValue {
485− animateLimitHitForButton(button: leftButton)
486− } else if value == maximumValue {
487− animateLimitHitForButton(button: rightButton)
488− }
191+ }, completion: { _ in
192+ UIView.animateWithDuration(self.labelSlideDuration, animations: {
193+ self.label.center.x -= self.labelSlideLength
194+ })
195+ })
489196 }
490−
491− func animateLimitHitForButton(button: UIButton){
492− UIView.animate(withDuration: limitHitAnimationDuration) {
197+
198+ private func animateLimitHitForButton(button: UIButton){
199+ UIView.animateWithDuration(limitHitAnimationDuration, animations: {
493200 button.backgroundColor = self.limitHitAnimationColor
494− }
495− }
496−}
497−
498−// MARK: Timer
499−extension GMStepper {
500− @objc func handleTimerFire(timer: Timer) {
501− timerFireCount += 1
502−
503− if timerFireCount % timerFireCountModulo == 0 {
504− updateValue()
505− }
506− }
507−
508− func scheduleTimer() {
509− timer = Timer.scheduledTimer(timeInterval: timerInterval, target: self, selector: #selector(GMStepper.handleTimerFire), userInfo: nil, repeats: true)
510− }
511−
512− func resetTimer() {
513− if let timer = timer {
514− timer.invalidate()
515− self.timer = nil
516− timerFireCount = 0
517− }
201+ }, completion: { _ in
202+ button.backgroundColor = self.buttonsBackgroundColor
203+ })
518204 }
519−
520−
521205}