ios - 我如何像这张图片一样创建 Collection View

Question

我需要前两个小单元格，第二个大单元格，再两个小单元格，两个大单元格。我曾尝试使用以下代码。但它没有给我正确的输出。否则任何易于为此实现的第三方库。急切地等待这个问题的答案。

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
    if (collectionView == _CollectionSale) {
        if (small && j != 2){
            j++;
            if(j==2){
                small = false;
                k = 0;

            }
            HomeSaleCC *objHomeSaleCC=[collectionView dequeueReusableCellWithReuseIdentifier:@"HomeSaleCC" forIndexPath:indexPath];
            return objHomeSaleCC;
        }else if(!small && k !=2){
             k++;
            if(k==2){
                small = true;
                j = 0;
            }
            HomeSaleCC2 *objHomeSaleCC2=[collectionView dequeueReusableCellWithReuseIdentifier:@"HomeSaleCC2" forIndexPath:indexPath];
            return objHomeSaleCC2;
        }

        HomeSaleCC *objHomeSaleCC=[collectionView dequeueReusableCellWithReuseIdentifier:@"HomeSaleCC" forIndexPath:indexPath];
        return objHomeSaleCC;


    }
    else{

    HomeTabCC *objHomeTabCC=[collectionView dequeueReusableCellWithReuseIdentifier:@"HomeTabCC" forIndexPath:indexPath];
    [objHomeTabCC.btnSale setTitle:[arrTitle objectAtIndex:indexPath.row] forState:UIControlStateNormal];
    [objHomeTabCC.btnSale setTitleColor:[UIColor orangeColor] forState:UIControlStateSelected];
    if (indexPath.row == i) {
        objHomeTabCC.viewLine.hidden =NO;
        objHomeTabCC.btnSale.selected =YES;
    }
    else{
        objHomeTabCC.viewLine.hidden =YES;
        objHomeTabCC.btnSale.selected =NO;
    }
    return objHomeTabCC;
    }
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
    if (collectionView == _CollectionSale) {
        if (small && j != 2){
            j++;
            if(j==2){
                small = false;
                k = 0;
            }
            return CGSizeMake(153, 186);
        }

    else if(!small && k !=2){
        k++;
        if(k==2){
            small = true;
            j = 0;
        }
        return CGSizeMake(260, 186);
    }else{
        return CGSizeMake(260, 186);
    }

    }
    else{
        return CGSizeMake(260, 186);
    }
}

Answer 1

支持@beyowulf 的回答我为这个问题写了一些代码，你可以find that here ，检查 CollectionViewTest 部分:

- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
    return 1;
}


- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {

    return 7;
}

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
    UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"smallCell" forIndexPath:indexPath];
    [cell.contentView setBackgroundColor:[UIColor redColor]];

    if (indexPath.row%4 < 2) {
        [cell.contentView setBackgroundColor:[UIColor greenColor]];
    }
    return cell;
}

-(CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath {
    if (indexPath.row % 4 < 2) {
        return CGSizeMake([UIScreen mainScreen].bounds.size.width / 2 - 15.0f, 80.0f);
    }
    return CGSizeMake([UIScreen mainScreen].bounds.size.width / 2 - 15.0f, 200.0f);
}

它看起来像这样: