swift爬行篇 滑块，进度条，步进，

滑块

1. 创建

let Sli: UISlider = UISlider(frame: CGRectMake(10.0,270,300,5)) as UISlider

        Sli.minimumValue = 10
        Sli.maximumValue = 300
        Sli.continuous = false 

continous属性为true：滑块在滑动过程中响应事件，为false时则只在滑动后响应事件

2.设置各区域的图片

        //滑块左边和右边的视图
        Sli.setMinimumTrackImage(UIImage(named: "green.png"),forState: UIControlState.Normal)
        Sli.setMinimumTrackImage(UIImage(named: "green.png"),forState: UIControlState.Normal)
        //滑块的视图
        //Sli.setThumbImage(UIImage(named: "green.png"),forState: UIControlState.Normal)
        //滑块最大值和最小值处的图片
        //Sli.minimumValueImage = UIImage(named: "green.png")
        //Sli.maximumValueImage = UIImage(named: "green.png")

        Sli.addTarget(self,action: "Progress",forControlEvents: UIControlEvents.ValueChanged)
        Sli.tag = 2

        let prog:UISlider = self.view.viewWithTag(2) as! UISlider
        let a = prog.value

1创建

        let Progress: UIProgressView = UIProgressView(frame: CGRectMake(10,3))
        Progress.progress = 0.0
        Progress.tag = 1

        let a = 50
        aaa.setProgress(a/100,animated: false)

1.创建

        let stepPro: UIStepper = UIStepper(frame: CGRectMake(10,310,5))
        stepPro.minimumValue = 0
        stepPro.maximumValue = 100
        stepPro.value = 0
        stepPro.stepValue = 2.0

        stepPro.addTarget(self,action: "stepEven:",forControlEvents: UIControlEvents.TouchDown)
        stepPro.continuous = true
        stepPro.tag = 255

3.获取步进的值

        let setp: UIStepper = self.view.viewWithTag(255) as! UIStepper
        let a = setp.value
        NSLog("(a)")

（编辑：李大同）

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