How to update text of labels in collection view? - swift

Question

I am working with collection view, all is going well and I want to add function when text field ,outside of collection view, end editing all labels text to be changed.
Here is my code
I tried my variation of newValue() function but no luck.
import UIKit
class ViewController: UIViewController, UICollectionViewDataSource, UICollectionViewDelegate, UIGestureRecognizerDelegate, UITextFieldDelegate {
var lastSelectedIndexPath:IndexPath?
#IBOutlet weak var txtx: UITextField!
var text2 = ["new text", "text2", "text3"]
override func viewDidLoad() {
let toolBar = UIToolbar()
toolBar.sizeToFit()
let flexibleSpace = UIBarButtonItem(barButtonSystemItem: .flexibleSpace, target: nil, action: nil)
let doneButton = UIBarButtonItem(barButtonSystemItem: .done, target: nil, action: #selector(doneButtonClicked))
toolBar.setItems([flexibleSpace,doneButton], animated: false)
doneButton.style = .done
doneButton.tintColor = UIColor.white // should be white
super.viewDidLoad()
ItemCollection.delegate = self
ItemCollection.dataSource = self
txtx.delegate = self
txtx.inputAccessoryView = toolBar
}
#objc func doneButtonClicked() {
view.endEditing(true)
}
// Store the clicked item location
private var section: Int = 0
private var item0 = 0
func newValue() {
//new func here
}
#IBAction func save() {
}
#IBOutlet weak var textField: UITextField!
#IBOutlet weak var ItemCollection: UICollectionView!
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return text2.count
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = ItemCollection.dequeueReusableCell(withReuseIdentifier: "check", for: indexPath) as? checkCollectionViewCell
cell?.isSelected = (lastSelectedIndexPath == indexPath)
cell?.layer.backgroundColor = colorLiteral(red: 0.1068892553, green: 0.119746305, blue: 0.1270511448, alpha: 1)
cell?.layer.cornerRadius = 10
cell?.backgroundColor = UIColor(red: 0/256, green: 128/256, blue: 255/256, alpha: 0.66)
cell?.az.text = text2[indexPath.row]
cell?.chechButton.backgroundColor = .clear
return cell!
}
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
// text2[indexPath.row] = "Selected"
// self.ItemCollection.reloadItems(at: [indexPath])
guard lastSelectedIndexPath != indexPath else{
return
}
if lastSelectedIndexPath != nil {
ItemCollection.deselectItem(at: lastSelectedIndexPath!, animated: false)
}
let selectedCell = collectionView.cellForItem(at: indexPath) as! checkCollectionViewCell
selectedCell.isSelected = true
lastSelectedIndexPath = indexPath
}
}
What function should I add to update all text by save button.? Thank you)!

Answer 1

add all changed values in array (text2 in your code)
once you update values call this method
self.collectionview.reloadData()
[edited]
func reload(){
self.text2 = ["new data1", "newd ata2" , "new data3"]
self.collectionView.reloadData()
}