网上参考OBJC写的用ScrollView图片轮播效果，照着画了个，先上效果图:
附上代码：
@IBOutlet weak var pc: UIPageControl!
@IBOutlet weak var sv:UIScrollView! var timer:NSTimer! override func viewDidLoad() {
super.viewDidLoad() for i in ...{ //loading the images
let image = UIImage(named: "pic\(i).jpg")!
let x = CGFloat(i - ) * self.view.frame.width //这一步获取ScrollView的宽度时我用IPHONE6实体机测试是320，右边会出现第二张图片的一部分，最后还是用ROOT VIEW的宽度
var imageView = UIImageView(frame: CGRectMake(x, , self.view.frame.width, sv.bounds.height))
imageView.image = image
sv.pagingEnabled = true
sv.showsHorizontalScrollIndicator = false
sv.scrollEnabled = true
sv.addSubview(imageView)
sv.delegate = self
} sv.contentSize = CGSizeMake((self.view.frame.width * ), sv.frame.height)
pc.numberOfPages =
pc.currentPageIndicatorTintColor = UIColor.redColor()
pc.pageIndicatorTintColor = UIColor.whiteColor()
addTimer() } func scrollViewDidScroll(scrollView: UIScrollView) {
let width = self.view.frame.width
let offsetX = scrollView.contentOffset.x
let index = (offsetX + width / ) / width
pc.currentPage = Int(index)
} func scrollViewWillBeginDragging(scrollView: UIScrollView) {
removeTimer()
} func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
addTimer()
} func addTimer() {
timer = NSTimer.scheduledTimerWithTimeInterval(, target: self, selector: "nextImage", userInfo: nil, repeats: true)
} func removeTimer() {
timer.invalidate()
} func nextImage() {
var pageIndex = pc.currentPage
if pageIndex == {
pageIndex =
} else {
pageIndex++
} var offsetX = CGFloat(pageIndex) * self.view.frame.width
sv.setContentOffset(CGPointMake(offsetX, ), animated: true)
}