iOS培训–斗鱼直播APP之娱乐基本展示.docx

玩转【斗鱼直播APP】系列之娱乐基本展示作者：小码哥教育娱乐基本展示效果展示如图内容的展示界面布局内容的展示依然是一个UICollectionView懒加载UICollectionView将UICollectionView添加到控制器的View中实现数据源代理懒加载UICollectionViewprivatelet kItemMargin :CGFloat=10privatelet kItemW =(kScreenW -3* kItemMargin)/2privatelet kNormalItemH = kItemW *3/4privatelet kPrettyItemH = kItemW *4/3privatelet kHeaderViewH :CGFloat=50privatelet kNormalCellID =kNormalCellIDprivatelet kPrettyCellID =kPrettyCellIDprivatelet kHeaderViewID =kHeaderViewIDclassAmuseViewController:UIViewController{// MARK: 懒加载属性 fileprivate lazy var collectionView :UICollectionView={[unowned self]in// 1.创建布局let layout =UICollectionViewFlowLayout() layout.itemSize =CGSize(width: kItemW, height: kNormalItemH) layout.minimumLineSpacing =0 layout.minimumInteritemSpacing = kItemMargin layout.headerReferenceSize =CGSize(width: kScreenW, height: kHeaderViewH) layout.sectionInset =UIEdgeInsets(top:0, left: kItemMargin, bottom:0, right: kItemMargin)// 2.创建UICollectionViewlet collectionView =UICollectionView(frame:self.view.bounds, collectionViewLayout: layout) collectionView.backgroundColor =UIColor.white collectionView.dataSource =self collectionView.delegate=self collectionView.autoresizingMask =[.flexibleHeight,.flexibleWidth] collectionView.register(UINib(nibName:CollectionNormalCell, bundle:nil), forCellWithReuseIdentifier: kNormalCellID) collectionView.register(UINib(nibName:CollectionPrettyCell, bundle:nil), forCellWithReuseIdentifier: kPrettyCellID) collectionView.register(UINib(nibName:CollectionHeaderView, bundle:nil), forSupplementaryViewOfKind:UICollectionElementKindSectionHeader, withReuseIdentifier: kHeaderViewID)return collectionView}()// MARK: 系统回调override func viewDidLoad(){super.viewDidLoad() setupUI()}}实现数据源代理方法// MARK:- 遵守UICollectionView的数据源代理协议extension AmuseViewController:UICollectionViewDataSource,UICollectionViewDelegate{ func numberOfSections(in collectionView:UICollectionVie