swift爬行篇 滑块，进度条，步进，

概述滑块 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

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")

3.响应事件和Tag

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

4. 获取滑块的值

        let prog:UiSlider = self.vIEw.vIEwWithTag(2) as! UiSlider        let a = prog.value

进度条

1创建

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

2.设置

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

步进控件

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

2.响应事件

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

continuous属性UiSlider类似

3.获取步进的值

        let setp: UIStepper = self.vIEw.vIEwWithTag(255) as! UIStepper        let a = setp.value        NSLog("\(a)")

总结

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