如何使两个自定义UICollectionViewCell类共享相同的变量名

Question

我有两个自定义UICollectionViewCell类，但是，我想在同一作用域中创建一个同名的变量，因为CellForItematIndexPath方法中的所有属性和所有代码对于这两个自定义单元格都是相同的。

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{


CustomCell1/CustomCell2 *cell;

if (condition) {
    cell = (CustomCell1 *)[collectionView dequeueReusableCellWithReuseIdentifier:kCustomCell1Identifier forIndexPath:indexPath];
} else {
    cell = (CustomCell2 *)[collectionView dequeueReusableCellWithReuseIdentifier:kCustomCell2Identifier forIndexPath:indexPath];
}

    // Remaining code is same for both custom cells
    cell.property1 = value1;
    cell.property2 = value2;
    .
    .
    .
    .
    .
    //lot of code
    cell.property100 = value100;

return cell;
} 

条件（三元）运算符是否可以这样做？

Answer 1

可以创建基（父）collectionviewCell类

@interface BaseCollectionViewCell : UICollectionViewCell 
//Add the common methods(can add common IBOulet and IBAction) and implement them.
@end

现在，您可以创建新的集合视图单元格，该单元格派生自BaseCollectionViewCell为：

@interface ChildCell : BaseCollectionViewCell
//add methods which are specific to the ChildCell as the methods of    
//BaseCollectionViewCell is already available via inheritance.
@end

与创建另一个集合视图单元格的方式相同：

@interface ChildCell2 : BaseCollectionViewCell
//add methods which are specific to the ChildCell2 as the methods of    
//BaseCollectionViewCell is already available via inheritance.
@end

现在ChildCell和ChildCell2获得BaseCollectionViewCell的所有方法。

将集合视图单元格与单独的重用标识符一起注册到这些类中。使用以下代码出列单元格。

 BaseCollectionViewCell *cell;

  if (condition) {

  ChildCell *cell1 = (ChildCell *)[collectionView      
  dequeueReusableCellWithReuseIdentifier:kCustomCell1Identifier 
  forIndexPath:indexPath];
  //call cell1's specific properties if needed.
  cell = (BaseCollectionViewCell *) cell1;

  } else {

   ChildCell2 cell2 = (ChildCell2 *)[collectionView 
   dequeueReusableCellWithReuseIdentifier:kCustomCell2Identifier forIndexPath:indexPath];
  //call cell2's specific properties if needed.
  cell = (BaseCollectionViewCell *) cell2;

  }
//call common methods here.