创建一个继承UICollectionView的类QHCollectionView

在QHCollectionView.h中添加接口方法

1 @interface QHCollectionView : UICollectionView 2 /** 3   *  @frame: 外界传来的frame 即collectionView的大小 4   * 5   *  @itemSize: 即collectionViewCell上的Item大小 6   * 7   *  @imagerArr: 外界存放UIImage的数组 8   */ 9 - (instancetype)initWithFrame:(CGRect)frame collectionViewItemSize:(CGSize)itemSize withImageArr:(NSArray *)imagerArr;10 @end

1 #import "QHCollectionView.h" 2  3 #define cellID @"cellID" 4 @interface QHCollectionView ()
     
       5 @property (nonatomic, strong) UICollectionViewFlowLayout *layout; 6 @property (nonatomic, assign) CGSize ItemSize; 7 @property (nonatomic, strong) NSArray *ImageArray; 8 @end 9 @implementation QHCollectionView10 - (UICollectionViewFlowLayout *)layout {11     if (!_layout) {12         _layout = [[UICollectionViewFlowLayout alloc] init];13         _layout.itemSize = self.ItemSize;14         _layout.minimumLineSpacing = 10.0;15         _layout.minimumInteritemSpacing = 0.0;16         _layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;17         _layout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);18     }19     return _layout;20 }21 - (instancetype)initWithFrame:(CGRect)frame collectionViewItemSize:(CGSize)itemSize withImageArr:(NSArray *)imagerArr {22     _ItemSize = itemSize;23     if (self = [super initWithFrame:frame collectionViewLayout:self.layout]) {24 //        [self setLayout:self.layout];25         _ImageArray = imagerArr;26         self.bounces = NO;27         self.pagingEnabled = NO;28         self.showsHorizontalScrollIndicator = NO;29         self.delegate = self;30         self.dataSource = self;31         [self registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:cellID];32     }33     return self;34 }35 36 #pragma mark - UICollectionViewDelegate --- UICollectionViewDataSource37 - (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {38     return self.ImageArray.count;39 }40 - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {41     UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];42     [cell.contentView.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)]; //43 44     UIImageView *imageV = [[UIImageView alloc] initWithImage:_ImageArray[indexPath.row]];45     CGRect imageFrame = imageV.frame;46     imageFrame.size = _ItemSize;47     imageV.frame = imageFrame;48     [cell.contentView addSubview:imageV];49     return cell;50 }51 - (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {52     NSLog(@"第%ld分区--第%ld个Item", indexPath.section, indexPath.row);53 }54 55 @end
     

最后在ViewController.m中导入头文件 以及调用

1 #import "ViewController.h" 2 #import "QHCollectionView.h" 3 @interface ViewController ()
     
       4 @property (nonatomic, strong) UITableView *tableView; 5 @end 6  7 @implementation ViewController 8 - (UITableView *)tableView { 9     if (!_tableView) {10         _tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) style:(UITableViewStylePlain)];11         _tableView.delegate = self;12         _tableView.dataSource = self;13         [self.view addSubview:_tableView];14     }15     return _tableView;16 }17 - (void)viewDidLoad {18     [super viewDidLoad];19     [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:NSStringFromClass([UITableViewCell class])];20 }21 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{22     return 200;23 }24 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{25     return 2;26 }27 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{28     UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:NSStringFromClass([UITableViewCell class]) forIndexPath:indexPath];29     UIImage *image1 = [UIImage imageNamed:@"1.jpg"];30     UIImage *image2 = [UIImage imageNamed:@"2.jpg"];31     UIImage *image3 = [UIImage imageNamed:@"3.jpg"];32     UIImage *image4 = [UIImage imageNamed:@"4.jpg"];33     NSArray *array = @[image1, image2, image3, image4, image1, image2, image3, image4];//可以自己导入喜欢的图片34 35     QHCollectionView *CollectionView = [[QHCollectionView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 200) collectionViewItemSize:CGSizeMake(100, 180) withImageArr:array];36 37     [cell.contentView addSubview:CollectionView];38     return cell;39 }40 - (void)didReceiveMemoryWarning {41     [super didReceiveMemoryWarning];42     // Dispose of any resources that can be recreated.43 }44 45 @end
     

可以优化，创建一个类继承tableViewcell，重写，这里就不在上传代码了。