第二個參數(shù) : cell 的布局
UICollectionViewFlowLayout * flowLayout = [[UICollectionViewFlowLayout
alloc]init];
滾動方向:
flowLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal ;
行間距(最小)
flowLayout.minimumLineSpacing = 0;
列間距(最小)
flowLayout.minimumInteritemSpacing = 30;
item大小
flowLayout.itemSize = CGSizeMake(40, 30);
setcion 的邊距
flowLayout.sectionInset = UIEdgeInsetsMake(10, 10, 10, 10);
header 大小
flowLayout.headerReferenceSize = CGSizeMake(320, 20);
footer大小
flowLayout.footerReferenceSize = CGSizeMake(320, 20);
創(chuàng)建集合視圖
UICollectionView * cView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, 320, 568 ) collectionViewLayout:flowLayout];
cView.dataSource = self; 設(shè)置 dataSource 代理
cView.delegate = self; 設(shè)置delegate 代理
[self.view addSubview:cView];
集合視圖cell 的數(shù)量
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return 100;
}
集合視圖 設(shè)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 設(shè)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;
}
點擊Collection 的cell 時 觸發(fā) 此方法
#pragma mark - UICollectionViewDelegate
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
}
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