SappigStepper是用Swift写成的一个UIStepper的优雅的替代品，有拇指滑块，可更加灵活地控制数值更新。
使用示例：
let stepper = SappigStepper(frame: CGRectMake(0, 0, 100, 40))override fuc viewDidLoad() { super.viewDidLoad() // Cofigure the stepper like ay other UIStepper. For example: // // stepper.cotiuous = true // stepper.autorepeat = true // stepper.wraps = false // stepper.miimumValue = 0 // stepper.maximumValue = 100 // stepper.stepValue = 1 stepper.fot = UIFot(ame: "TrebuchetMS-Bold", size: 20) stepper.fotColor = UIColor.blackColor() stepper.backgroudColor = UIColor.redColor() stepper.thumbColor = UIColor.orageColor() stepper.addTarget(self, actio: "valueChaged:", forCotrolEvets: .ValueChaged) // If you do't wat usig the traditioal `addTarget:actio:` patter you ca use // the `valueChagedBlock` // sappigStepper.valueChageBlock = { (value: Double) i // pritl("value: \(value)") // } view.addSubview(stepper)}fuc valueChaged(seder: AyObject) { // Retrieve the value: stepper.value}
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