需要引用第三方:SDWebImage
import UIKit
class ScrollerView: UIView, UIScrollViewDelegate {
var delegate: LYHScrollerViewDelegate!
var scrollView: UIScrollView!
var page: UIPageControl!
var timer: NSTimer!
var array: [String]? {
willSet(newValue) {
self.array = newValue
}
didSet {
self.scrollView = UIScrollView(frame: self.frame)
scrollView.contentSize = CGSizeMake(self.frame.size.width * CGFloat((array?.count)! + 2), 0)
scrollView.contentOffset = CGPointMake(self.frame.size.width, 0)
scrollView.pagingEnabled = true
scrollView.bounces = false
scrollView.delegate = self;
scrollView.showsHorizontalScrollIndicator = false
let tap = UITapGestureRecognizer(target: self, action: "tap")
scrollView.addGestureRecognizer(tap)
self .addSubview(self.scrollView)
let firstImageView = UIImageView(frame: CGRectMake(0, 0, self.frame.size.width, 200))
firstImageView.sd_setImageWithURL(NSURL.init(string: (array?.last)!), placeholderImage: UIImage.init(named: ""))
self.scrollView.addSubview(firstImageView)
let lastImageView = UIImageView(frame: CGRectMake(self.frame.size.width * CGFloat((array?.count)! + 1), 0, self.frame.size.width, 200))
lastImageView.sd_setImageWithURL(NSURL.init(string: (array?.first)!), placeholderImage: UIImage.init(named: ""))
self.scrollView.addSubview(lastImageView)
for var i = 0; i < array?.count; ++i {
let imageView = UIImageView.init(frame: CGRectMake(self.frame.size.width * CGFloat(i + 1), 0, self.frame.size.width, 200))
imageView.sd_setImageWithURL(NSURL.init(string: self.array![i]), placeholderImage: UIImage.init(named: ""))
self.scrollView.addSubview(imageView)
}
self.page = UIPageControl()
page.frame = CGRectMake(0, 0, 200, 20)
page.center = CGPointMake(self.frame.size.width / 2, 185)
page.numberOfPages = (array?.count)!
page.currentPageIndicatorTintColor = UIColor.orangeColor()
page.pageIndicatorTintColor = UIColor.whiteColor()
page.addTarget(self, action: "handlePage:", forControlEvents: .ValueChanged)
self .addSubview(page)
self.addTimer()
}
}
// 定時器方法實現
func time() {
UIView.animateWithDuration(0.5, animations: { () -> Void in
self.scrollView.contentOffset = CGPointMake(self.scrollView.contentOffset.x + self.frame.size.width, 0)
}) { (Bool) -> Void in
self.scrollViewDidEndDecelerating(self.scrollView)
}
}
// scrollViewDelegate
//減速停止了時執行，手觸摸時執行執行
func scrollViewDidEndDecelerating(scrollView: UIScrollView) {
if self.scrollView == scrollView {
if self.scrollView.contentOffset.x == 0 {
self.scrollView.contentOffset = CGPointMake(self.frame.size.width * CGFloat((array?.count)!), 0)
}
if self.scrollView.contentOffset.x == self.frame.size.width * CGFloat(((array?.count)! + 1)) {
self.scrollView.contentOffset = CGPointMake(self.frame.size.width, 0)
}
self.page.currentPage = Int(self.scrollView.contentOffset.x / self.frame.size.width) - 1
}
}
// 開始拖拽
func scrollViewWillBeginDragging(scrollView: UIScrollView) {
//關閉定時器
self.removeTimer()
}
// 完成拖拽
func scrollViewDidEndDragging(scrollView: UIScrollView, willDecelerate decelerate: Bool) {
//添加定時器
self.addTimer()
}
// 添加定時器方法
func addTimer (){
self.timer = NSTimer.scheduledTimerWithTimeInterval(3, target: self, selector: "time", userInfo: nil, repeats: true)
NSRunLoop.currentRunLoop().addTimer(self.timer, forMode: NSRunLoopCommonModes)
}
// 移除定時器方法
func removeTimer (){
self.timer.invalidate()
self.timer = nil
}
// 重寫初始化方法
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder aDecoder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
// scrollView添加的手勢的點擊方法
func tap () {
if (delegate != nil) {
delegate.selectt(Int(self.scrollView.contentOffset.x - self.frame.size.width) / Int(self.frame.size.width))
}
}
}
// 聲明協議
@objc protocol LYHScrollerViewDelegate: NSObjectProtocol {
//回調方法
func selectt(index:Int)
}
