使用Swift在UICollectionView中更新单个单元格

Question

使用UICollectionView时，我遇到更新单个单元格的问题。 当我点击标签时，我希望标签更改为我可以手动分配的不同数字的值。

代码：

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    //return nameArray.count;
    return 81;
}

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell=collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as! CollectionViewCell;

    switch(flattened[indexPath.item]){
    case 1:
        cell.labelText.text="1";
    case 2:
       cell.labelText.text="2";
    case 3:
        cell.labelText.text="3";
    case 4:
        cell.labelText.text="4";
    case 5:
        cell.labelText.text="5";
    case 6:
        cell.labelText.text="6";
    case 7:
        cell.labelText.text="7";
    case 8:
        cell.labelText.text="8";
    case 9:
        cell.labelText.text="9";
    default:
        cell.labelText.text="0";
        //print(indexPath.item)

    }

    return cell;
}

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {

}

当我运行我的代码时：

Answer 1

首先在数组中添加这些值

var array:[String] = ["1", "2" ,"3"] //and so on

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return array.count
}

并在cellforRow中这样做

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "CollectionViewCell", for: indexPath) as! CollectionViewCell
    cell.label.text = self.array[indexpath.row]
}

使用集合视图didSelectItem获取您要点按的特定单元格

  func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
         self.array[indexpath.row] = "YOUR VALUE"
         //self.collectionView.reloadData()
         self.collectionView.reloadItems(at: [indexpath])
    }

建议：尝试了解MVC，MVVM和建模 然后尝试这样：https://stackoverflow.com/a/49248513/5589073