爲UICollectionView指定行號和列號

Question

我想顯示一個UICollectionView，其中每行包含2行和100個單元格。

// 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; 
} 

我得到這個：

我如何可以指定一個行號爲UICollectionView？我想創建一個2x100表格。

Answer 1

試試這個：

// 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; 
} 

Answer 2

部分的數量表明許多細胞如何將每一行中，假設電池的尺寸允許它。

一節將始終啓動一個新行。

Answer 3

對於每行3個單元格..添加此代碼。

- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath 
{ 
    return CGSizeMake(collectionView.frame.size.width/3.2 , 100); 
} 

Answer 4

的SWIFT：每柱3行（通過使用@SakhshiSingla應答）

override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int { 
    return 1 
} 

override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int { 
    return 3 
} 

func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize 
    { 
     return CGSize(width: collectionView.frame.size.width/3.2, height: 100) 
    } 

Answer 5

的更通用的方法，以實現在集合視圖n列是兼容任何取向是

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)) 
}