iOS开发——UI篇Swift篇&UIScrollView

  1     //返回按钮事件
  2     @IBAction func backButtonClick()
  3     {
  4         self.navigationController?.popViewControllerAnimated(true)
  5     }
  6     
  7     //创建滚动视图
  8     var mainScrollView:UIScrollView!
  9     
 10     var view1:UIView!
 11     var view2:UIView!
 12     var view3:UIView!
 13     
 14     //创建UIPageControl实例
 15     var pageCtrl:UIPageControl!
 16     
 17     override func viewDidLoad() {
 18         super.viewDidLoad()
 19         
 20         titleLabel.text = titleString
 21         
 22         
 23         // Do any additional setup after loading the view.
 24         
 25         //创建滚动视图
 26         mainScrollView = UIScrollView(frame: CGRectMake(20, 100, 300, 400))
 27         
 28         //设置背景色
 29         mainScrollView.backgroundColor = UIColor.grayColor()
 30         
 31         //添加到视图上
 32         self.view.addSubview(mainScrollView)
 33         
 34         //创建3个视图，添加到ScrollView上
 35         view1 = UIView(frame: CGRectMake(0, 0, 300, 400))
 36         view1.backgroundColor = UIColor.redColor()
 37         mainScrollView.addSubview(view1)
 38         
 39         
 40         view2 = UIView(frame: CGRectMake(300, 0, 300, 400))
 41         view2.backgroundColor = UIColor.greenColor()
 42         mainScrollView.addSubview(view2)
 43         
 44         view3 = UIView(frame: CGRectMake(600, 0, 300, 400))
 45         view3.backgroundColor = UIColor.blueColor()
 46         mainScrollView.addSubview(view3)
 47         
 48         //设置scrollView的容器大小
 49         mainScrollView.contentSize = CGSizeMake(300*3, 400)
 50         
 51         //设置滚动条风格
 52         mainScrollView.indicatorStyle = UIScrollViewIndicatorStyle.White
 53         
 54         
 55         
 56         //设置水平方向滚动条是否可见
 57         mainScrollView.showsHorizontalScrollIndicator = false
 58         
 59         //设置垂直方向滚动条是否可见
 60         mainScrollView.showsVerticalScrollIndicator = false
 61         
 62         //设置成翻页滚动
 63         mainScrollView.pagingEnabled = true
 64         
 65         mainScrollView.delegate = self
 66         
 67         
 68         mainScrollView.maximumZoomScale = 2.0;//允许放大2倍
 69         mainScrollView.minimumZoomScale = 0.5;//允许放大到0.5倍
 70         
 71         
 72         
 73         //页面控制器
 74         
 75         //创建UIPageControl实例
 76         pageCtrl = UIPageControl(frame: CGRectMake(20, 540, 300, 40))
 77         
 78         //添加到视图
 79         self.view.addSubview(pageCtrl)
 80         
 81         //设置总页数
 82         pageCtrl.numberOfPages = 3
 83         
 84         //当前显示到第几页面
 85         pageCtrl.currentPage = 0
 86         
 87         
 88         //添加事件
 89         pageCtrl.addTarget(self, action: "pageTurn:", forControlEvents: UIControlEvents.ValueChanged)
 90         
 91         
 92         
 93     }
 94 
 95     override func didReceiveMemoryWarning() {
 96         super.didReceiveMemoryWarning()
 97         // Dispose of any resources that can be recreated.
 98     }
 99     
100 
101     /*
102     // MARK: - Navigation
103 
104     // In a storyboard-based application, you will often want to do a little preparation before navigation
105     override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
106         // Get the new view controller using segue.destinationViewController.
107         // Pass the selected object to the new view controller.
108     }
109     */
110 
111     
112     
113     
114     //MARK: - UIScrollViewDelegate
115     
116     func scrollViewDidScroll(scrollView: UIScrollView)
117     {
118         //视图滚动中一直触发
119     }
120 
121     func scrollViewWillBeginDragging(scrollView: UIScrollView)
122     {
123         //刚开始拖动视图时触发一次
124     }
125     
126     func scrollViewWillEndDragging(scrollView: UIScrollView, withVelocity velocity: CGPoint, targetContentOffset: UnsafeMutablePointer<CGPoint>)
127     {
128         //将要结束拖动触发一次
129     }
130     
131     func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool)
132     {
133         //拖动结束，触发一次
134     }
135     
136     func scrollViewWillBeginDecelerating(scrollView: UIScrollView)
137     {
138         //拖动接触后，开始减速
139     }
140     
141     func scrollViewDidEndDecelerating(scrollView: UIScrollView)
142     {
143         //减速完毕，恢复到静止状态
144         
145        //获取scrollView视图滚动的x坐标
146         var offX:CGFloat = scrollView.contentOffset.x
147         
148         //计算当前是第几屏
149         var index:Int = (Int)(offX / 300)
150         
151         //设置分页指示器currentPage值
152         pageCtrl.currentPage = index;
153     }
154     
155     
156     //缩放功能-返回缩放的视图
157     func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView?
158     {
159         //获取当前滚动视图移动的X坐标
160         var offsetX = scrollView.contentOffset.x
161         println(offsetX)
162         
163         
164         if offsetX == 0 //如果没有滚动，返回view1
165         {
166             return view1
167         }
168         else if offsetX == 300 //滚动300，返回view2
169         {
170             return view2
171         }
172         else if offsetX == 600 //滚动600，返回view3
173         {
174             return view3
175         }
176         
177         return nil
178     }
179     
180     
181     func scrollViewDidZoom(scrollView: UIScrollView)
182     {
183         //缩放过程中一直调用
184     }
185     
186     func scrollViewWillBeginZooming(scrollView: UIScrollView, withView view: UIView!)
187     {
188         //开始缩放，调用一次
189     }
190     
191     func scrollViewDidEndZooming(scrollView: UIScrollView, withView view: UIView!, atScale scale: CGFloat)
192     {
193         //缩放结束，调用一次
194     }
195     
196     
197     func scrollViewDidEndScrollingAnimation(scrollView: UIScrollView)
198     {
199         println("scrollViewDidEndScrollingAnimation")
200     }
201     
202     func scrollViewShouldScrollToTop(scrollView: UIScrollView) -> Bool
203     {
204         return false
205     }
206     
207     func scrollViewDidScrollToTop(scrollView: UIScrollView)
208     {
209         println("scrollViewDidScrollToTop")
210     }
211     
212     
213     
214     //MARK: - 
215     
216     //分页控制器value改变事件
217     func pageTurn(sender:AnyObject?)
218     {
219         //获取分页控制器
220 //        var newPageCtl = sender as UIPageControl
221         
222         //2015年5月2后修改
223         var newPageCtl = sender as! UIPageControl
224         
225         
226         //获取分页控制器当前页
227         var index = newPageCtl.currentPage
228         
229         //设置ScrollView的x移动距离
230         mainScrollView.contentOffset = CGPointMake((CGFloat)(300 * index), 0)
231     }