iOS开发——UI篇Swift篇&UISlider

  1  
  2     override func viewDidLoad() {
  3         super.viewDidLoad()
  4         
  5         titleLabel.text = titleString
  6         
  7         
  8         // Do any additional setup after loading the view.
  9         
 10         
 11         
 12         
 13         //创建
 14         var slider:UISlider = UISlider(frame: CGRectMake(20, 100, 200, 60))
 15         
 16         //添加到视图上
 17         self.view.addSubview(slider)
 18         
 19         //设置最小值
 20         slider.minimumValue = 10
 21         
 22         //设置最大值
 23         slider.maximumValue = 80
 24         
 25         //设置默认值
 26         slider.value = 30
 27         
 28         //设置左端图片
 29         slider.setMinimumTrackImage(UIImage(named: "minimumTrackImage"), forState: UIControlState.Normal)
 30         
 31         //设置又端图片
 32         slider.setMaximumTrackImage(UIImage(named: "maximumTrackImage"), forState: UIControlState.Normal)
 33         
 34         
 35         
 36         //读取当滑块控件的值：
 37         var value = slider.value
 38         println(value)
 39         
 40         
 41         //添加通知，获取值改变
 42         slider.addTarget(self, action: "sliderValueChange:", forControlEvents: UIControlEvents.ValueChanged)
 43         
 44         //continuous默认是true，设置成false后，只有停止拖动才会触发sliderValueChange:方法
 45         slider.continuous = false
 46         
 47         
 48         
 49         //-----自定义滑块
 50         
 51         //定义左右图片
 52         var stetchLeftTrack:UIImage! = UIImage(named: "leftTrack.png")
 53         var stetchRightTrack:UIImage! = UIImage(named: "rightTrack.png")
 54        
 55         //定义滑块图片
 56          var thumbImage:UIImage! = UIImage(named: "thumbImage.png")
 57         
 58         //创建UISlider对象
 59         var newSlider:UISlider = UISlider(frame: CGRectMake(30, 300, 257, 8))
 60         newSlider.backgroundColor = UIColor.clearColor()
 61         newSlider.minimumValue = 0.5
 62         newSlider.maximumValue = 1.5
 63         newSlider.value = 1.0
 64         
 65         //设置左右图片
 66         newSlider.setMinimumTrackImage(stetchLeftTrack, forState: UIControlState.Normal)
 67         newSlider.setMaximumTrackImage(stetchRightTrack, forState: UIControlState.Normal)
 68         
 69         //设置拖动圆点的图片，注意这里要加UIControlState.Highlighted的状态，否则当拖动滑块时滑块将变成原生的控件
 70         newSlider.setThumbImage(thumbImage, forState: UIControlState.Normal)
 71         newSlider.setThumbImage(thumbImage, forState: UIControlState.Highlighted)
 72         
 73         //添加通知，获取值改变
 74         newSlider.addTarget(self, action: "newSliderValueChange:", forControlEvents: UIControlEvents.ValueChanged)
 75         
 76         
 77         //滑动拖动后的事件
 78         newSlider.addTarget(self, action: "newSliderTouchUpInside:", forControlEvents: UIControlEvents.TouchUpInside)
 79         
 80         self.view.addSubview(newSlider)
 81     }
 82 
 83     override func didReceiveMemoryWarning() {
 84         super.didReceiveMemoryWarning()
 85         // Dispose of any resources that can be recreated.
 86     }
 87     
 88 
 89     /*
 90     // MARK: - Navigation
 91 
 92     // In a storyboard-based application, you will often want to do a little preparation before navigation
 93     override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
 94         // Get the new view controller using segue.destinationViewController.
 95         // Pass the selected object to the new view controller.
 96     }
 97     */
 98     
 99     
100     //slider值改变触发的方法
101     func sliderValueChange(sender: AnyObject?)
102     {
103 //        var newSlider:UISlider = sender as UISlider
104         
105         //2015年5月2后修改
106         var newSlider:UISlider = sender as! UISlider
107         var value = newSlider.value
108         println(value)
109     }
110     
111     
112     //自定义滑块使用
113     
114     //拖动事件
115     func newSliderValueChange(sender: AnyObject?)
116     {
117 //        var newSlider:UISlider = sender as UISlider
118         
119         //2015年5月2后修改
120         var newSlider:UISlider = sender as! UISlider
121         println(newSlider.value)
122     }
123     
124     //滑动拖动后的事件
125     func newSliderTouchUpInside(sender: AnyObject?)
126     {
127 //        var newSlider:UISlider = sender as UISlider
128         
129         //2015年5月2后修改
130         var newSlider:UISlider = sender as! UISlider
131         println(newSlider.value)
132     }
133