1.声明一个bannerScrollView，图片数组imageArray, pageControl, 计时器timer
var bannerScrollView :UIScrollView!
var imageArray = ["1","2","3","4","5"]
var pageControl:UIPageControl!
var timer:Timer!
- 在viewdidload里面写实现方法
self.setPageControl()
self.bannerScrollView = self.setBannerSrcrollView(imageArray: imageArray)
self.view.addSubview(self.bannerScrollView)
self.setTimerTarget()
3.设置pageControl方法
func setPageControl() {
self.pageControl = UIPageControl.init(frame: CGRect.init(x:WIDTH/2-40*scaleWidth, y: 264*scaleWidth, width: 80*scaleWidth, height: 20*scaleWidth))
self.pageControl.numberOfPages = self.imageArray.count
self.pageControl.currentPage = 0
self.pageControl.addTarget(self, action: #selector(self.setPageControlClick), for: .touchUpInside)
self.view.addSubview(self.pageControl)
}
func setPageControlClick() {
self.timer.invalidate()
let page = self.pageControl.currentPage
self.bannerScrollView.scrollRectToVisible(CGRect.init(x: WIDTH*CGFloat(page+1), y: 0, width: WIDTH, height: 200), animated: true)
self.setTimerTarget()
}
4.计时器设置
func setTimerTarget() {
self.timer = Timer.scheduledTimer(timeInterval: 3, target: self , selector: #selector(self.setTimerClick), userInfo: nil, repeats: true)
}
func setTimerClick() {
let page = self.pageControl.currentPage + 1
if page >= self.imageArray.count {
self.pageControl.currentPage = 0
self.bannerScrollView.scrollRectToVisible(CGRect.init(x: WIDTH, y: 0, width: WIDTH, height: 200), animated: false)
}else {
self.pageControl.currentPage = page
self.bannerScrollView.scrollRectToVisible(CGRect.init(x: WIDTH*CGFloat(page+1), y: 0, width: WIDTH, height: 200*scaleWidth), animated: true)
}
}
5.设置scrollview
func setBannerSrcrollView(imageArray:[String]) -> UIScrollView {
let bannerScrollView = UIScrollView.init(frame: CGRect(x: 0, y: 64, width: WIDTH, height: 200*scaleWidth))
bannerScrollView.contentSize = CGSize(width: Int(WIDTH)*(imageArray.count+2), height: 64)
bannerScrollView.showsVerticalScrollIndicator = false
bannerScrollView.showsHorizontalScrollIndicator = false
bannerScrollView.isPagingEnabled = true
bannerScrollView.delegate = self
for i in 0..<imageArray.count+2 {
let imageView = UIImageView()
imageView.frame = CGRect(x: Int(WIDTH)*i, y: 0, width: Int(WIDTH), height: Int(200*scaleWidth))
imageView.isUserInteractionEnabled = true
if i == 0 {
imageView.image = UIImage.init(named: imageArray[imageArray.count - 1])
}else if i == imageArray.count+1 {
imageView.image = UIImage.init(named: imageArray[0])
}else {
if i <= imageArray.count {
imageView.tag = i
imageView.image = UIImage.init(named: imageArray[i-1])
}
}
let tap = UITapGestureRecognizer()
tap.addActionBlock({ (_) in
self.setImageViewTapClick(imageView: imageView)
})
imageView.addGestureRecognizer(tap)
bannerScrollView.addSubview(imageView)
}
bannerScrollView.scrollRectToVisible(CGRect.init(x: WIDTH, y: 0, width: WIDTH, height: 200*scaleWidth), animated: true)
return bannerScrollView
}
func setImageViewTapClick(imageView:UIImageView) {
DEVPRINT(imageView.tag)
}
func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
self.timer.invalidate()
}
func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
self.setTimerTarget()
let offet = scrollView.contentOffset.x
DEVPRINT("bannaer -- \(offet)")
if offet == 0 {
self.pageControl.currentPage = self.imageArray.count
self.bannerScrollView.scrollRectToVisible(CGRect.init(x: WIDTH*CGFloat(self.imageArray.count ), y: 0, width: WIDTH, height: 200), animated: false)
}else{
if offet == CGFloat(self.imageArray.count+1)*WIDTH{
self.pageControl.currentPage = 0
self.bannerScrollView.scrollRectToVisible(CGRect.init(x: WIDTH, y: 0, width: WIDTH, height: 200), animated: false)
}else{
self.pageControl.currentPage = Int(offet/WIDTH-1)
}
}
6.切换到其他跟控制器，暂停计时器.
override func viewDidDisappear(_ animated: Bool) {
if self.timer != nil {
self.timer.fireDate = NSDate.distantFuture
}
}
override func viewWillAppear(_ animated: Bool) {
if self.timer != nil {
self.timer.fireDate = NSDate.distantPast
}
}
deinit {
self.timer.invalidate()
}
