iOS开发中实现新闻图片的无限循环展示的方法

//

 

#import "YYViewController.h"
#import "MJExtension.h"
#import "YYnews.h"
#import "YYcell.h"

#define YYIDCell @"cell"

@interface YYViewController ()<UICollectionViewDataSource,UICollectionViewDelegate>
@property (weak, nonatomic) IBOutlet UICollectionView *collectinView;
@property(nonatomic,strong)NSArray *news;
@end

复制代码
@implementation YYViewController

 

#pragma mark-懒加载
-(NSArray *)news
{
    if (_news==nil) {
        _news=[YYnews objectArrayWithFilename:@"newses.plist"];
    }
    return _news;
}
- (void)viewDidLoad
{
    [super viewDidLoad];
    //注册cell
//    [self.collectinView registerClass:[YYimageCell class] forCellWithReuseIdentifier:YYCell];
    [self.collectinView registerNib:[UINib nibWithNibName:@"YYcell" bundle:nil] forCellWithReuseIdentifier:YYIDCell];
    
}

#pragma mark- UICollectionViewDataSource
//一共多少组，默认为1组
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
    return 1;
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
    return self.news.count;
}

-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    YYcell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:YYIDCell forIndexPath:indexPath];
    cell.news=self.news[indexPath.item];
    return cell;
}

#pragma mark-UICollectionViewDelegate
@end

3.补充说明

 

（1）如果collectionCell是以xib的方式自定义的，那么在注册cell的时候，需要使用另外一种方式。

复制代码
[self.collectinView registerClass:[YYimageCell class] forCellWithReuseIdentifier:YYCell];
[self.collectinView registerNib:[UINib nibWithNibName:@"YYcell" bundle:nil] forCellWithReuseIdentifier:YYIDCell];