Swift 如何在选择时更改 CollectionView UItextField backgroundColor

Question

大家好，我是 Swift 的新手，我在网上搜索了很长时间。但是没有用。请帮助或尝试提供一些想法如何实现这一目标。

this first pic when I didn't do anything

The Second Pic is when I already select one textfield

The Third Pic is when I selected that selected All Btn

The Four Pic is when I selected that select All Btn and Deselect one textfield

现在我只能像图二和图三那样做，但是当我选择时我不能使图二的文本字段文本颜色。

我怎样才能像图四一样做到这一点？

我正在使用 collectionView 这样做 我尝试了多种变体，但似乎都不起作用。有什么想法吗？

这是我的代码

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! MyCollectionViewCell
         if isselectAll == true{
            cell.titleText2.textColor = .white
            cell.titleText2.backgroundColor = UIColor(red: 153/255, green: 31/255, blue: 37/255, alpha: 1)
            selectedCell.append(indexPath)
        }
        return cell 
   }
func collectionView(_ collectionView:   UICollectionView,didSelectItemAt indexPath: IndexPath)
    {
     let cell = collectionView.cellForItem(at: indexPath)!
        selectedCell.append(indexPath)
        cell.contentView.backgroundColor = UIColor(red: 153/255,  green: 31/255, blue: 37/255, alpha: 1)
    }
func collectionView(_ collectionView: UICollectionView,didDeselectItemAt indexPath: IndexPath)
       {
        let cell = collectionView.cellForItem(at: indexPath)!
        if selectedCell.contains(indexPath) {
            selectedCell.remove(at: selectedCell.index(of: indexPath)!)
            cell.contentView.backgroundColor = .clear
       }

想知道这样做是否是好的做法，最好的方法是什么？谢谢伙伴

Answer 1

使用此代码(还设置文本字段委托(delegate) Storyboard)

class ViewController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource, UITextFieldDelegate {

@IBOutlet weak var collectedView: UICollectionView!
var flag = false

override func viewDidLoad() {
super.viewDidLoad()
self.collectedView.delegate = self
self.collectedView.dataSource = self
}

//press selected All Button
@IBAction func selcetedAll(_ sender: Any) {
self.flag = true
self.collectedView.reloadData()
}

//MARK: UIcolletionViewDelegate
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 10 //return cell according to your requirement
}


func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "Cell", for: indexPath) as! MyCollectionViewCell
if flag {
  cell.textF.backgroundColor = UIColor.red
}
cell.textF.text = String(indexPath.row)
return cell
}

func textFieldDidBeginEditing(_ textField: UITextField) {
if textField.backgroundColor == UIColor.red {
  textField.backgroundColor = UIColor.white
} else {
  textField.backgroundColor = UIColor.red
}
}
}