1.建立SB
image.png2.拖拽属性,完成代理实现
UICollectionViewFlowLayout *flowLaout = [[UICollectionViewFlowLayout alloc]init];
flowLaout.scrollDirection = UICollectionViewScrollDirectionVertical;
//上下间距
flowLaout.minimumLineSpacing = 0;
//左右间距
flowLaout.minimumInteritemSpacing = 0;
flowLaout.itemSize = CGSizeMake((ScreenWidth-55)/2, Width(243));
_collectionView.collectionViewLayout = flowLaout;
//注册xib建的cell
[_collectionView registerNib:[UINib nibWithNibName:@"FDStoreGoodsCollectionViewCell" bundle:nil] forCellWithReuseIdentifier:@"FDStoreGoodsCollectionViewCell"];
//注册尾视图
[_collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"FooterView"];
//注册xib建的头视图
[_collectionView registerNib:[UINib nibWithNibName:@"FDShopHeardView" bundle:nil] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"FDShopHeardView"];
实现代理方法
-(NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView{
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 20;
}
//内边距处理
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
// UIEdgeInsets insets = {top, left, bottom, right};
return UIEdgeInsetsMake(0, 20, 0, 20);
}
//设置尾部视图高度
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForFooterInSection:(NSInteger)section
{
return CGSizeMake(ScreenWidth, 50);
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section {
return CGSizeMake(ScreenWidth,130);
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
FDStoreGoodsCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"FDStoreGoodsCollectionViewCell" forIndexPath:indexPath];
return cell;
}
- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{
if (kind == UICollectionElementKindSectionHeader) {
FDShopHeardView *header = (FDShopHeardView*)[collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"FDShopHeardView" forIndexPath:indexPath];
return header;
}else{
UICollectionReusableView *footerView = [collectionView dequeueReusableSupplementaryViewOfKind:UICollectionElementKindSectionFooter withReuseIdentifier:@"FooterView" forIndexPath:indexPath];
footerView.backgroundColor = [UIColor whiteColor];
for (UIView *view in footerView.subviews) { [view removeFromSuperview]; }
UILabel *titleLabel = [[UILabel alloc]initWithFrame:CGRectMake((ScreenWidth)/2-80, 20, 160, 17)];
titleLabel.textAlignment = NSTextAlignmentCenter;
titleLabel.text = @"更多商品敬请期待…";
[footerView addSubview:titleLabel];
return footerView;
}
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
[collectionView deselectItemAtIndexPath:indexPath animated:YES];
}
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