Swift 图片浏览器

class ViewController: UIViewController, UIScrollViewDelegate{

var scrollView: UIScrollView?

var images: NSMutableArray = NSMutableArray(capacity: 5)

override func viewDidLoad() {

super.viewDidLoad()

//

self.title = "图片浏览"

self.automaticallyAdjustsScrollViewInsets = false

scrollView = UIScrollView(frame: self.view.bounds)

self.view.addSubview(scrollView!)

//不显示滚动条

scrollView?.showsHorizontalScrollIndicator = false

scrollView?.showsVerticalScrollIndicator = false

//设置分页显示

scrollView?.pagingEnabled = true

//设置背景颜色

scrollView?.backgroundColor = UIColor.redColor()

//设置内容视图大小

scrollView?.contentSize = CGSize(width: self.view.frame.size.width * 5, height: self.view.frame.size.height)

scrollView?.delegate = self

//加载图片

for index in 0...5 {

let image: UIImage! = UIImage(named: "\(index).JPG")

let photoScrollView:PhotoScrollView! = PhotoScrollView(frame: CGRect(x: self.view.frame.size.width * CGFloat(index), y: 0, width: self.view.frame.size.width, height: self.view.frame.size.height))

photoScrollView.tag = 200+index

photoScrollView.backgroundColor = UIColor(red:0.4, green: 1, blue: 1, alpha: 1)

photoScrollView.image = image

self.scrollView?.addSubview(photoScrollView)

}

}

func scrollViewDidEndDecelerating(scrollView: UIScrollView)

{

let currentIndex = Int(scrollView.contentOffset.x/self.view.bounds.width)

if currentIndex != index {

let photoScrollView = scrollView.viewWithTag(200+index) as! PhotoScrollView;

//还原比例大小

photoScrollView.setZoomScale(1, animated: false)

}

index = currentIndex

}

var index:NSInteger = 0

}

2.设置img

class PhotoScrollView: UIScrollView, UIScrollViewDelegate {

var _image:UIImage!

var image:UIImage! {

get {

return self._image

}

set {

_image = newValue

let imgView:UIImageView = self.viewWithTag(100) as! UIImageView

imgView.backgroundColor = UIColor.greenColor()

imgView.image = image

}

}

override init(frame: CGRect) {

super.init(frame: frame)

let imgView:UIImageView! = UIImageView(frame: self.bounds)

imgView.tag = 100

self.addSubview(imgView)

//取消滑动条

self.showsHorizontalScrollIndicator = false

self.showsVerticalScrollIndicator = false

self.delegate = self

//设置最大、最小缩放比例

self.maximumZoomScale = 3

self.minimumZoomScale = 1

}

required init?(coder aDecoder: NSCoder) {

super.init(coder: aDecoder)

}

func viewForZoomingInScrollView(scrollView: UIScrollView) -> UIView? {

return self.viewWithTag(100)

}

}