//
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// CommonBannerView.swift
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// WanPai
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//
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// Created by 无故事王国 on 2023/6/30.
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//
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import UIKit
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import SDWebImage
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struct CommonBannerModel {
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var index = 0 //自定义索引
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var id:Int? //ID
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var name:String? //名称
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var resource:String? //数据源：URL等
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var mediaType:CommonBannerView.MediaType?
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}
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class CommonBannerView: UIView, UICollectionViewDelegate, UICollectionViewDataSource,UICollectionViewDelegateFlowLayout {
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enum MediaType {
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case videoUrl,imageUrl,imageLocal,videoLocal
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}
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private lazy var collectionView:UICollectionView = {
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var layout = UICollectionViewFlowLayout()
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layout.minimumLineSpacing = 0
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layout.minimumInteritemSpacing = 0
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layout.scrollDirection = .horizontal
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layout.sectionInset = .zero
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layout.headerReferenceSize = .zero
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layout.footerReferenceSize = .zero
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layout.itemSize = CGSize(width: self.width, height: self.height)
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let collectionView = UICollectionView(frame:CGRect(x: 0, y: 0, width: self.width, height: self.height), collectionViewLayout: layout)
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collectionView.delegate = self
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collectionView.dataSource = self
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collectionView.isPagingEnabled = true
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collectionView.showsHorizontalScrollIndicator = false
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collectionView.register(CommonBannerViewCell.self, forCellWithReuseIdentifier: "BannerView")
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collectionView.decelerationRate = .normal
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collectionView.contentInsetAdjustmentBehavior = .never
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collectionView.backgroundColor = .white
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collectionView.bounces = false
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return collectionView
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}()
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private lazy var pageControl:UIPageControl = {
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let control = UIPageControl()
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control.currentPageIndicatorTintColor = .white
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control.pageIndicatorTintColor = .gray.withAlphaComponent(0.6)
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return control
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}()
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private var timer:Timer?
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private var items = [CommonBannerModel]()
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private var selectClouse:((CommonBannerModel)->Void)?
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private var autoRoll:Bool = true
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private var currentPage:Int = 0
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private var timeInterval:Int = 5
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override func awakeFromNib() {
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super.awakeFromNib()
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setUI()
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}
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public func setItems(items:[CommonBannerModel],autoRoll:Bool = true,selectClouse:((CommonBannerModel)->Void)? = nil){
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self.items = items
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if items.count > 1{
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self.items.append(items.first!)
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}
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self.autoRoll = autoRoll
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self.selectClouse = selectClouse
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if items.count <= 1{self.autoRoll = false}
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setUI()
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collectionView.reloadData()
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if self.autoRoll{
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DispatchQueue.main.asyncAfter(deadline: .now()+5) {
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self.startTimer()
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}
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}
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}
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private func setUI(){
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addSubview(collectionView)
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collectionView.snp.makeConstraints { make in
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make.edges.equalToSuperview()
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}
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if items.count > 1{
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pageControl.numberOfPages = items.count - 1
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addSubview(pageControl)
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pageControl.snp.makeConstraints { make in
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make.centerX.equalToSuperview()
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make.bottom.equalToSuperview().offset(-10)
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make.height.equalTo(8)
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}
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}
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}
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private func startTimer(){
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timer = Timer(timeInterval: TimeInterval(timeInterval), repeats: true, block: {[weak self] t in
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guard let weakSelf = self else { return }
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var page = weakSelf.collectionView.contentOffset.x / weakSelf.collectionView.width
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weakSelf.currentPage = Int(page + 1)
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if weakSelf.currentPage >= weakSelf.pageControl.numberOfPages{
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weakSelf.currentPage = 0
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weakSelf.collectionView.setContentOffset(.zero, animated: false)
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weakSelf.pageControl.currentPage = 0
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}
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weakSelf.collectionView.setContentOffset(CGPoint(x: weakSelf.currentPage * Int(weakSelf.width), y: 0), animated: true)
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})
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timer?.fire()
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RunLoop.current.add(timer!, forMode: .common)
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}
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func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
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return items.count
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}
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func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
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let item = items[indexPath.row]
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selectClouse?(item)
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}
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func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
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return CGSize(width:collectionView.bounds.size.width,height:ceil(collectionView.bounds.size.height))
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}
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func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
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print("--开始滑动")
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timer?.fireDate = Date.distantFuture
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}
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func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
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let page = scrollView.contentOffset.x / scrollView.width
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if page.int >= pageControl.numberOfPages{
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pageControl.currentPage = 0
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}else{
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pageControl.currentPage = page.int
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}
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print("--结束滑动")
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timer?.fireDate = Date.init(timeIntervalSinceNow: 3.0) //3秒后开启
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}
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func scrollViewDidEndScrollingAnimation(_ scrollView: UIScrollView) {
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let page = scrollView.contentOffset.x / scrollView.width
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if page.int >= pageControl.numberOfPages{
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pageControl.currentPage = 0
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}else{
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pageControl.currentPage = page.int
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}
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}
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func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
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let page = scrollView.contentOffset.x / scrollView.width
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if page.int >= pageControl.numberOfPages{
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pageControl.currentPage = 0
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collectionView.setContentOffset(.zero, animated: false)
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}else{
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pageControl.currentPage = page.int
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}
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}
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func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
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let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "BannerView", for: indexPath) as! CommonBannerViewCell
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let item = items[indexPath.row]
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switch item.mediaType {
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case .imageUrl:
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if let i = item.resource{
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cell.imgView.sd_setImage(with: URL(string: i))
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}
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case .imageLocal:
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if let i = item.resource{
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cell.imgView.image = UIImage(named: i)
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}
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default:break
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}
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return cell
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}
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}
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class CommonBannerViewCell: UICollectionViewCell {
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lazy var imgView:UIImageView = {
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let img = UIImageView()
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img.contentMode = .scaleToFill
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return img
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}()
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override init(frame: CGRect) {
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super.init(frame: frame)
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contentView.addSubview(imgView)
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imgView.snp.makeConstraints { make in
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make.edges.equalToSuperview()
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}
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}
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required init?(coder aDecoder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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}
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