UIStepper

var stepper : UIStepper!//微调器
var label : UILabel!

stepper = UIStepper()
stepper.frame = CGRectMake(50, 200, 280, 50)
stepper.minimumValue = 0//最小值
stepper.maximumValue = 10;//最大值
stepper.value = 3//初值
stepper.stepValue = 1//每次增减的大小
stepper.continuous = true//长按是否可以连续改变值
stepper.wraps = false//时候可以循环
stepper.tintColor = UIColor.redColor()//设置整体色调
//用自定义的图片替换“-”和“+”
stepper.setDecrementImage(UIImage(named: "-1"), forState: UIControlState.Normal)
stepper.setIncrementImage(UIImage(named: "+1"), forState: UIControlState.Normal)


stepper.addTarget(self, action: Selector("stepperDidChange"), forControlEvents: UIControlEvents.ValueChanged)
self.view.addSubview(stepper)

label = UILabel(frame: CGRectMake(50, 50, 280, 50))
label.text = "stepper的值为\(stepper.value)"
self.view.addSubview(label)

func stepperDidChange(){
    label.text = "stepper的值为\(stepper.value)"
}