我想显示一个UICollectionView,每行包含2行和100个单元格。
// 1
- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section {
return 100;
}
// 2
- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView {
return 2;
}
// 3
- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {
MyCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];
cell.lbl.text = @"Data";
return cell;
}
我得到了这个:
如何为UICollectionView指定行号?我想创建一个2x100表。
答案 0 :(得分:16)
试试这个:
// 1
- (NSInteger)collectionView:(UICollectionView *)view numberOfItemsInSection:(NSInteger)section {
return 2;
}
// 2
- (NSInteger)numberOfSectionsInCollectionView: (UICollectionView *)collectionView {
return 100;
}
// 3
- (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {
MyCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];
cell.lbl.text = @"Data";
return cell;
}
答案 1 :(得分:16)
每行3个单元格..添加此代码。
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath
{
return CGSizeMake(collectionView.frame.size.width/3.2 , 100);
}
答案 2 :(得分:11)
对于Swift :每列3行(使用@SakhshiSingla答案)
4786.6445
答案 3 :(得分:10)
在集合视图中实现与任何方向兼容的n列的更一般方法是
func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize {
// flow layout have all the important info like spacing, inset of collection view cell, fetch it to find out the attributes specified in xib file
guard let flowLayout = collectionViewLayout as? UICollectionViewFlowLayout else {
return CGSize()
}
// subtract section left/ right insets mentioned in xib view
let widthAvailbleForAllItems = (collectionView.frame.width - flowLayout.sectionInset.left - flowLayout.sectionInset.right)
// Suppose we have to create nColunmns
// widthForOneItem achieved by sunbtracting item spacing if any
let widthForOneItem = widthAvailbleForAllItems / nColumns - flowLayout.minimumInteritemSpacing
// here height is mentioned in xib file or storyboard
return CGSize(width: CGFloat(widthForOneItem), height: (flowLayout.itemSize.height))
}
答案 4 :(得分:3)
部分数量决定每行中有多少个单元格,假设单元格大小允许它。
一个部分将始终开始一个新行。