aa2aa74 · GMStepper · git.iko.soy

9import UIKit

10

11@IBDesignable public class GMStepper: UIControl {

12−

12+

13 /// Current value of the stepper. Defaults to 0.

14 public var value = 0 {

15 didSet {

16 value = min(maximumValue, max(minimumValue, value))

17 label.text = String(value)

18−

18+

19 if oldValue != value {

20 sendActionsForControlEvents(.ValueChanged)

21 }

22 }

23 }

24−

24+

25 /// Minimum value. Must be less than maximumValue. Defaults to 0.

26 @IBInspectable public var minimumValue: Int = 0 {

27 didSet {

28 value = 0

29 }

30 }

31−

31+

32 /// Maximum value. Must be more than minimumValue. Defaults to 10.

33 @IBInspectable public var maximumValue: Int = 10 {

34 didSet {

35 value = 0

36 }

37 }

38−

38+

39 /// Text on the left button. Be sure that it fits in the button. Defaults to "-".

40 @IBInspectable public var leftButtonText: String = "-" {

41 didSet {

42 leftButton.setTitle(leftButtonText, forState: .Normal)

43 }

44 }

45−

45+

46 /// Text on the right button. Be sure that it fits in the button. Defaults to "+".

47 @IBInspectable public var rightButtonText: String = "+" {

48 didSet {

49 rightButton.setTitle(rightButtonText, forState: .Normal)

50 }

51 }

52−

52+

53 /// Text color of the buttons. Defaults to white.

54 @IBInspectable public var buttonsTextColor: UIColor = UIColor.whiteColor() {

55 didSet {

58 }

59 }

60 }

61−

61+

62 /// Background color of the buttons. Defaults to dark blue.

63 @IBInspectable public var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1) {

64 didSet {

68 backgroundColor = buttonsBackgroundColor

69 }

70 }

71−

71+

72 /// Font of the buttons. Defaults to AvenirNext-Bold, 20.0 points in size.

73 public var buttonsFont = UIFont(name: "AvenirNext-Bold", size: 20.0)! {

74 didSet {

77 }

78 }

79 }

80−

80+

81 /// Text color of the middle label. Defaults to white.

82 @IBInspectable public var labelTextColor: UIColor = UIColor.whiteColor() {

83 didSet {

84 label.textColor = labelTextColor

85 }

86 }

87−

87+

88 /// Text color of the middle label. Defaults to lighter blue.

89 @IBInspectable public var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1) {

90 didSet {

98 label.font = labelFont

99 }

100 }

101−

101+

102 /// Corner radius of the stepper's layer. Defaults to 4.0.

103 @IBInspectable public var cornerRadius: CGFloat = 4.0 {

104 didSet {

106 clipsToBounds = true

107 }

108 }

109−

109+

110 /// 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.

111 @IBInspectable public var labelWidthWeight: CGFloat = 0.5 {

112 didSet {

114 setNeedsLayout()

115 }

116 }

117−

117+

118 /**

119 Width of the sliding animation. When buttons clicked, the middle label does a slide animation towards to the clicked button. Defaults to 5.

120 */

121 private let labelSlideLength: CGFloat = 5

122−

122+

123 /// Duration of the sliding animation

124 private let labelSlideDuration: NSTimeInterval = 0.1

125−

125+

126 /// Duration of the flashing animation when the value hits the limit.

127 private let limitHitAnimationDuration: NSTimeInterval = 0.1

128−

128+

129 /// Color of the flashing animation on the buttons in case the value hit the limit.

130 @IBInspectable public var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)

131−

131+

132 private let leftButton = UIButton()

133 private let rightButton = UIButton()

134 private let label = UILabel()

135−

135+

136 required public init(coder aDecoder: NSCoder) {

137 super.init(coder: aDecoder)

138 setup()

139 }

140−

140+

141 public override init(frame: CGRect) {

142 super.init(frame: frame)

143 setup()

144 }

145−

145+

146 private func setup() {

147 leftButton.setTitle(leftButtonText, forState: .Normal)

148 leftButton.setTitleColor(buttonsTextColor, forState: .Normal)

150 leftButton.titleLabel?.font = buttonsFont

151 leftButton.addTarget(self, action: "leftButtonTapped:", forControlEvents: .TouchDown)

152 addSubview(leftButton)

153−

153+

154 rightButton.setTitle(rightButtonText, forState: .Normal)

155 rightButton.setTitleColor(buttonsTextColor, forState: .Normal)

156 rightButton.backgroundColor = buttonsBackgroundColor

157 rightButton.titleLabel?.font = buttonsFont

158 rightButton.addTarget(self, action: "rightButtonTapped:", forControlEvents: .TouchDown)

159 addSubview(rightButton)

160−

160+

161 label.textAlignment = .Center

162 label.text = String(value)

163 label.textColor = labelTextColor

164 label.backgroundColor = labelBackgroundColor

165 label.font = labelFont

166 addSubview(label)

167−

167+

168 backgroundColor = buttonsBackgroundColor

169 layer.cornerRadius = cornerRadius

170 clipsToBounds = true

171 }

172−

172+

173 public override func layoutSubviews() {

174 let buttonWidth = bounds.size.width * ((1 - labelWidthWeight) / 2)

175 let labelWidth = bounds.size.width * labelWidthWeight

176−

176+

177 leftButton.frame = CGRect(x: 0, y: 0, width: buttonWidth, height: bounds.size.height)

178 label.frame = CGRect(x: buttonWidth, y: 0, width: labelWidth, height: bounds.size.height)

179 rightButton.frame = CGRect(x: labelWidth + buttonWidth, y: 0, width: buttonWidth, height: bounds.size.height)

180 }

181−

181+

182 @objc private func leftButtonTapped(button: UIButton) {

183 if value == minimumValue {

184 animateLimitHitForButton(leftButton)

196 animateSlideRight()

197 }

198 }

199−

199+

200 private func animateSlideLeft() {

201 UIView.animateWithDuration(labelSlideDuration, animations: {

202 self.label.center.x -= self.labelSlideLength

206 })

207 })

208 }

209−

209+

210 private func animateSlideRight() {

211 UIView.animateWithDuration(labelSlideDuration, animations: {

212 self.label.center.x += self.labelSlideLength

216 })

217 })

218 }

219−

219+

220 private func animateLimitHitForButton(button: UIButton){

221 UIView.animateWithDuration(limitHitAnimationDuration, animations: {

222 button.backgroundColor = self.limitHitAnimationColor