Question

我通常是Swift的新手。我有两个图像，我希望它们像复选框一样，第一个图像是未选中框，第二个图像是复选框，通过使用didSelectItemAt indexPath：在集合视图中，当用户点击该集合视图时，我将如何在两个图像之间切换。我有点困惑。继承我的代码：

var buttonCounter = 0 
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return faultyType.count
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "faulty_type_cell", for: indexPath) as! FaultyTypeCollectionViewCell
    cell.faultyTypeLabel.text = faultyType[indexPath.row]
    if buttonCounter == 0{
    cell.checkboxImage.image = UIImage(named: "Checkboxunpicked")
    }
    else if buttonCounter == 1{
    cell.checkboxImage.image = UIImage(named: "Checkboxpicked")
    }
    else if buttonCounter == 2{
    cell.checkboxImage.image = UIImage(named: "Checkboxpicked")
    }
    return cell
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
   if indexPath.row == 1{
   buttonCounter = 1
   } 
   if indexPath.row == 2{
   buttonCounter = 2
   }
}

Answer 1

我在网上搜索后找到了一个很好的解决方案。下面是我提到的解决方案：[link] How to access buttons in a UICollectionView from a target function set (Swift 3)快乐的编码狩猎。

var BoxOn = UIImage(named: "Checkboxpicked")
var BoxOff = UIImage(named: "Checkboxunpicked")
var buttonCounter = [Int]()

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "faulty_type_cell", for: indexPath) as! FaultyTypeCollectionViewCell
    cell.faultyTypeLabel.text = faultyType[indexPath.row]
    cell.checkboxImage.image = BoxOff
    if buttonCounter.contains(indexPath.row){
        cell.checkboxImage.image = BoxOn

    }
    else{
        cell.checkboxImage.image = BoxOff

    }
    return cell
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
    if buttonCounter.contains(indexPath.row){
        let index = buttonCounter.index(of: indexPath.row)
        buttonCounter.remove(at: index!)
        collectionView.reloadItems(at: [indexPath])
    }
    else{
        buttonCounter.append(indexPath.row)
        collectionView.reloadItems(at: [indexPath])
    }
    print(buttonCounter)
}

swift 3 - 集合视图didSelectItemAt indexPath for checkbox

1 个答案: