如新闻频道滑动切换的代码

效果：

collectionView的数据源方法

- (UICollectionViewCell *) collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath

{

    newsCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"news" forIndexPath:indexPath];

    NSString *urlString = self.arrayList[indexPath.item];

    if (![self.childViewControllers containsObject:cell.newsVc]) {

        [self addChildViewController:(UIViewController *)cell.newsVc];

    }

    cell.urlStr = urlString;

    return cell;

}

cell的自己定义例如以下

- (void)setUrlStr:(NSString *)urlStr

{

    _urlStr = urlStr;

    self.newsVc.urlStr = urlStr;

}

- (void)awakeFromNib

{

    UIStoryboard *sb = [UIStoryboard storyboardWithName:@"news" bundle:nil];

    self.newsVc = sb.instantiateInitialViewController;

    // 设置 view frame，否则，view frame 的大小不会调整！

    self.newsVc.view.frame = self.bounds;

    

    // 将 vc 的视图加入到 cell 中

    [self addSubview:self.newsVc.view];

}