Question

我是iOS和Swift的新手。

我无法获取我在UICollectionView单元格中存在的多个UITextFiled中手动输入的数据

我想在用户开始编辑文本后立即从每个文本字段中连续获取数据，然后将其压入对象的变量中。

单元格样本-将有多个单元格

Screen Shot

例如，以上链接中提供的图像是一个单元格的示例，该单元格包含多个文本字段，标签和按钮

现在我想从每个单元格中获取所有数据并将其存储在对象数组中

我的ViewController

extension SampleViewController:UICollectionViewDelegate,UICollectionViewDataSource, UICollectionViewDelegateFlowLayout{

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    return 10
}

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

    return cell;
}

}

我的模型对象类

class Singleton{

static let shared = Singleton()

var list = [CellFields].self

}

class CellFields {

var button1:bool
var button2:bool
var dropdown:String
var field1:String
var field2:String
var field3:String
var label1:String
var label2:String
}

我的UICollectionViewCell

class MySampleCollectionViewCell: UICollectionViewCell {
@IBOutlet weak var dropdown: DropDown!
@IBOutlet weak var field1: UITextField!
@IBOutlet weak var field2: UITextField!
@IBOutlet weak var field3: UITextField!
@IBOutlet weak var label1: UILabel!
@IBOutlet weak var label2: UILabel!
@IBOutlet weak var button1: UIButton!
@IBOutlet weak var button2: UIButton!
}

我尝试了所有委托方法，但仍然无法实现我想要的。

我想要获得的结果与此类似

Singleton.shared.list
[0]
  dropdown = "Dropdown"
  field1 = "Something"
  field2 = "Random"
  field3 = "Another"
  label1 = "Label"
  label2 = "Label2"
  button1 = true
  button2 = false
[1]
  dropdown = "Dropdown1"
  field1 = "Something1"
  field2 = "Random2"
  field3 = "Another3"
  label1 = "Label4"
  label2 = "Label3"
  button1 = false
  button2 = true
...
...
...

Answer 1

您不需要单例即可创建类对象数组：
```
let classFieldSets: [ClassFields] = []
```
在模型类中创建一个初始化方法：
通过SampleViewController扩展程序中的cellForItemAt将它们传递到单元格中。

Answer 2

创建类似于以下内容的内容：

// create your own delegate type for the cell
protocol MyCellDelegate {
    func myTextFieldChanged(_ tf: UITextField) // call when the textfield changes
    func myOtherTextFieldChanged(_ tf: UITextField) // call when the other textfield changes
    func myToggleChanged(_ sw: UISwitch) // call when the switch changes
}

class MyCell: UICollectionViewCell {
    @IBOutlet private var myTextField: UITextField!
    @IBOutlet private var myOtherTextField: UITextField!
    @IBOutlet private var myToggle: UISwitch!

    private var _delegate: MyCellDelegate? // instance of above protocol type, this will generally be your VC

    func initialize(withDelegate delegate: MyCellDelegate) {
        myTextField.delegate = self
        myOtherTextField.delegate = self
        self._delegate = delegate // a textfield uses a delegate pattern
        self.myToggle.addTarget(self, action: #selector(toggleValueChanged(_:)), for: .valueChanged) // a switch uses this target/selector pattern
    }
}

// I like putting delegate implementations in extensions
extension MyCell: UITextFieldDelegate {
    // called when a textfield changes
    func textFieldDidEndEditing(_ textField: UITextField) {
        if textField == myTextField {
            _delegate?.myTextFieldChanged(textField) // call the protocol's method to signal the VC of the change
        }
        if textField == myOtherTextField {
            _delegate?.myOtherTextFieldChanged(textField) // call the protocol's method to signal the VC of the change
        }
    }
}

extension MyCell {
    // @objc is required for the target/selector pattern
    @objc func toggleValueChanged(_ toggle: UISwitch) {
        if toggle == myToggle {
            _delegate?.myToggleChanged(toggle)
        }
    }
}

然后在您的VC的cellForItemAt中：

let cell=collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath) as! SampleCollectionViewCell;
cell.initialize(withDelegate: self)
return cell;

在您的VC中，也将其设置为MyCellDelegate，并带有：

extension SampleViewController: MyCellDelegate{
    func myTextFieldChanged(_ tf: UITextField) {
        // save new textfield value
    }
    func myOtherTextFieldChanged(_ tf: UITextField) {
        // save new other textfield value
    }
    func myToggleChanged(_ sw: UISwitch) {
        // save new toggle value
    }
}

理想情况下，您将创建一个单一的方法来立即更新整个表单，但这实际上取决于您拥有的数据类型以及可选的数据，我将把它作为一个挑战。但是，至少从这开始，您应该能够使您的表单正常工作，并了解所有委托内容的状况。

使用Swift从CollectionView单元中获取手动输入的数据并将其存储在对象数组中

2 个答案: