Swift实现可自定义分页宽度的UIScrollView

class ScrollViewPagingDemoViewController: UIViewController

 override func viewDidLoad() {
 super.viewDidLoad()

 self.view.addSubview(scrollPagingView)

 // 添加你的Page view，如：
 let view1 = UIView(frame: CGRectZero)
 view1.backgroundColor = UIColor(red: 0xff/255.0, green: 0x2d/255.0, blue: 0x41/255.0, alpha: 1.0)
 view1.layer.borderColor = UIColor(red: 0xff/255.0, green: 0x2d/255.0, blue: 0x41/255.0, alpha: 1.0).CGColor
 view1.layer.borderWidth = 0.5
 view1.layer.cornerRadius = 5
 scrollPagingView.addPage(view1)

 let view2 = UIView(frame: CGRectZero)
 view2.backgroundColor = UIColor(red: 0x00/255.0, green: 0x7a/255.0, blue: 0xff/255.0, alpha: 1.0)
 view2.layer.borderColor = UIColor(red: 0x00/255.0, green: 0x7a/255.0, blue: 0xff/255.0, alpha: 1.0).CGColor
 view2.layer.borderWidth = 0.5
 view2.layer.cornerRadius = 5
 scrollPagingView.addPage(view2)

 let view3 = UIView(frame: CGRectZero)
 view3.backgroundColor = UIColor(red: 0x4b/255.0, green: 0xd9/255.0, blue: 0x64/255.0, alpha: 1.0)
 view3.layer.borderColor = UIColor(red: 0x4b/255.0, green: 0xd9/255.0, blue: 0x64/255.0, alpha: 1.0).CGColor
 view3.layer.borderWidth = 0.5
 view3.layer.cornerRadius = 5
 scrollPagingView.addPage(view3)

 let view4 = UIView(frame: CGRectZero)
 view4.backgroundColor = UIColor(red: 0xff/255.0, green: 0x96/255.0, blue: 0x00/255.0, alpha: 1.0)
 view4.layer.borderColor = UIColor(red: 0xff/255.0, green: 0x96/255.0, blue: 0x00/255.0, alpha: 1.0).CGColor
 view4.layer.borderWidth = 0.5
 view4.layer.cornerRadius = 5
 scrollPagingView.addPage(view4)

 // 用户点击事件，如果需要的话  
 let tapGesture = UITapGestureRecognizer(target:self, action: #selector(ScrollViewPagingDemoViewController.scrollViewTapAction(_:)))
 scrollPagingView.addGestureRecognizer(tapGesture)
 }

 override func viewWillLayoutSubviews() {
 super.viewWillLayoutSubviews()

 // 设置大小，并初始化setup方法必须调用
 self.scrollPagingView.frame = CGRect(x: 0, y: 100, width: self.view.bounds.width, height: 240)
 self.scrollPagingView.setup() 
 }

 private lazy var scrollPagingView: CDScrollPagingView = {
 let scrollPagingView = CDScrollPagingView()
 // 控制页与页之间的间隔，默认为10
 scrollPagingView.itemSpacing = 10.0
 // 是否显示分页指示器，默认显示
 scrollPagingView.showPageControl = true
 // 自动切换的时间间隔，默认为3s，0表示不自动切换
 scrollPagingView.timeInterval = 3.0
 return scrollPagingView
 }()

 func scrollViewTapAction(sender: CDScrollPagingView){
 if let curPage = scrollPagingView.currentPage() {
  let alertController = UIAlertController(title: "系统提示",
            message: "您点击第\\(curPage)页", preferredStyle: .Alert)
  let okAction = UIAlertAction(title: "Ok", style: .Default, handler: nil)
  alertController.addAction(okAction)
  self.presentViewController(alertController, animated: true, completion: nil)

 }
 }
}