我在ViewController.Now是新來的迅速和努力實現的CollectionView功能我有三種UICollectionViewCell的,這裏是我的代碼:?如何使用switch語句在Swift中實現collectionView函數?
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if collectionView == self.collectionViewCategory {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: categoryIdentifier, for: indexPath as IndexPath) as! CategoryCell
cell.CategoryIcon.image = self.categoryItems[indexPath.item]
cell.layer.borderColor = UIColor.lightGray.cgColor
cell.layer.borderWidth = 1
cell.layer.cornerRadius = 5
return cell
}
else if collectionView == self.collectionViewHour {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: hourIdentifier, for: indexPath as IndexPath) as! HourCell
cell.hourItem.text = self.hourItems[indexPath.item]
cell.layer.borderColor = UIColor.lightGray.cgColor
cell.layer.borderWidth = 1
cell.layer.cornerRadius = 5
return cell
}
else {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: minuteIdentifier, for: indexPath as IndexPath) as! MinuteCell
cell.minuteItem.text = self.minuteItems[indexPath.item]
cell.layer.borderColor = UIColor.lightGray.cgColor
cell.layer.borderWidth = 1
cell.layer.cornerRadius = 5
return cell
}
}
我可以使用switch語句來達到同樣的效果做的代碼看起來更優雅?
我希望我的代碼如下所示:
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell:UICollectionViewCell
switch collectionView {
case self.collectionViewCategory:
cell = collectionView.dequeueReusableCell(withReuseIdentifier: categoryIdentifier, for: indexPath as IndexPath) as! CategoryCell
cell.CategoryIcon.image = self.categoryItems[indexPath.item]
case self.collectionViewHour:
cell = collectionView.dequeueReusableCell(withReuseIdentifier: hourIdentifier, for: indexPath as IndexPath) as! HourCell
cell.hourItem.text = self.hourItems[indexPath.item]
default:
//do nothing.
}
cell.layer.borderColor = UIColor.lightGray.cgColor
cell.layer.borderWidth = 1
cell.layer.cornerRadius = 5
return cell
}
但我得到了很多錯誤,我不知道如何解決這些問題。
添加枚舉所有可能的情況。 –
謝謝!我會盡力的。 –