UICollectionView集合视图-创新互联
第二个参数 : cell 的布局
UICollectionViewFlowLayout * flowLayout = [[UICollectionViewFlowLayout
alloc]init];
滚动方向:
flowLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal ;
行间距(最小)
flowLayout.minimumLineSpacing = 0;
列间距(最小)
flowLayout.minimumInteritemSpacing = 30;
item大小
flowLayout.itemSize = CGSizeMake(40, 30);
setcion 的边距
flowLayout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);
header 大小
flowLayout.headerReferenceSize = CGSizeMake(320, 20);
footer大小
flowLayout.footerReferenceSize = CGSizeMake(320, 20);
创建集合视图
UICollectionView * cView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, 320, 568 ) collectionViewLayout:flowLayout];
cView.dataSource = self; 设置 dataSource 代理
cView.delegate = self; 设置delegate 代理
[self.view addSubview:cView];
集合视图cell 的数量
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 100;
}
集合视图 设定 cell
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
MyCollectionViewCell * cell = [collectionView dequeueReusableCellWithReuseIdentifier:cellidentifier forIndexPath:indexPath];
cell.backgroundColor = [UIColor redColor];
cell.textLavel.text = [NSString stringWithFormat:@"%ld",(long)indexPath.row];
return cell;
}
Header 和 Footer 设置
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath
{
if ([kind isEqualToString:UICollectionElementKindSectionHeader]) {
HeaderView * headerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:headeridentifier forIndexPath:indexPath];
return headerView;
}
FooterView * footerView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:footeridentifier forIndexPath:indexPath];
return footerView;
}
点击Collection 的cell 时 触发 此方法
#pragma mark - UICollectionViewDelegate
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
}
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