GMStepper：帶動畫效果、支持手勢滑動操作的步進標簽

A stepper with a sliding label in the middle. Pan the label or tap the buttons. Check out the tutorial, How to Build a Custom Stepper - Part 1 .

Screenshot

GMStepper is available through CocoaPods . To install it, simply add the following lines to your Podfile:

use_frameworks!
pod "GMStepper"

If you want to use storyboards, just drop a UIView into your storyboard and set its class toGMStepper. Then customize through the attributes inspector. Otherwise, you can write the code to initialize with frame and set the properties.

Properties

/// Current value of the stepper. Defaults to 0.
var value: Double = 0 

/// Minimum value. Must be less than maximumValue. Defaults to 0.
var minimumValue: Double = 0

/// Maximum value. Must be more than minimumValue. Defaults to 100.
var maximumValue: Double = 100

/// Step/Increment value as in UIStepper. Defaults to 1.
var stepValue: Double = 1

/// The same as UIStepper's autorepeat. If true, holding on the buttons or keeping the pan gesture alters the value repeatedly. Defaults to true.
var autorepeat: Bool = true

/// If the value is integer, it is shown without floating point.
var showIntegerIfDoubleIsInteger: Bool = true

/// Text on the left button. Be sure that it fits in the button. Defaults to "-".
var leftButtonText: String = "-"

/// Text on the right button. Be sure that it fits in the button. Defaults to "+".
var rightButtonText: String = "+"

/// Text color of the buttons. Defaults to white
var buttonsTextColor: UIColor = UIColor.whiteColor()

/// Background color of the buttons. Defaults to dark blue.
var buttonsBackgroundColor: UIColor = UIColor(red:0.21, green:0.5, blue:0.74, alpha:1)

/// Font of the buttons. Defaults to AvenirNext-Bold, 20.0 points in size.
var buttonsFont = UIFont(name: "AvenirNext-Bold", size: 20.0)

/// Text color of the middle label. Defaults to white.
var labelTextColor: UIColor = UIColor.whiteColor()

/// Text color of the middle label. Defaults to lighter blue.
var labelBackgroundColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)

/// Font of the middle label. Defaults to AvenirNext-Bold, 25.0 points in size.
var labelFont = UIFont(name: "AvenirNext-Bold", size: 25.0)

/// Corner radius of the stepper's layer. Defaults to 4.0.
var cornerRadius: CGFloat = 4.0

/// 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.
var labelWidthWeight: CGFloat = 0.5 

/// Color of the flashing animation on the buttons in case the value hit the limit.
var limitHitAnimationColor: UIColor = UIColor(red:0.26, green:0.6, blue:0.87, alpha:1)

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