two sections and different three cells - swift

Question

1.I have one more section1
func numberOfSections(in tableView: UITableView) -> Int {
return 2
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
if section == 0 {
return 1
}else{
return 3 //imageName.count
}
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
var thirdCell = ThirdTableViewCell()
var cell = UITableViewCell()
var row2Cell = Row2TableViewCell()
if indexPath.row == 0 {
cell = tableView.dequeueReusableCell(withIdentifier: "Cell1", for: indexPath)
return cell
}else if indexPath.row == 1{
thirdCell = tableView.dequeueReusableCell(withIdentifier: "thirdCell", for: indexPath) as! ThirdTableViewCell
thirdCell.image1.image = #imageLiteral(resourceName: "plus")//imageArray[indexPath.row]
return thirdCell
}else{
row2Cell = tableView.dequeueReusableCell(withIdentifier: "Row2Cell", for: indexPath) as! Row2TableViewCell
return row2Cell
}
}
2.How did I get ThirdViewController.image

Answer 1

As I see you want to access ThirdViewController.image in your ThirdTableViewCell Class
this is how you can access instance of viewController (e.g Labels, Images and TextFeilds etc) in other View Controller or in custom class.
import UIKit
internal weak var AccessThirdViewController: ThirdViewController?
class ThirdViewController: UIViewController, UITableViewDelegate, UITableViewDataSource{
#IBOutlet weak var imageViewToChange: UIImageView!
override func viewDidLoad() {
AccessThirdViewController = self
}
it will make it accessible in all other viewControllers or classes
import UIKit
class ThirdTableViewCell: UITableViewCell {
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
#IBAction func onButtonClick(_ sender: Any) {
AccessThirdViewController?.imageViewToChange.image = UIImage(named: "rocket")!
}
}
Now you can simply access ThirdViewController directly using AccessThirdViewContoller
Or you can achieve this by using NotificationCenter as creating
NotificationCenter addObserver
Receive(Get) Notification and Function-Method handler for received Notification:
import UIKit
class ThirdViewController: UIViewController, UITableViewDelegate, UITableViewDataSource{
#IBOutlet weak var imageViewToChange: UIImageView!
override func viewDidLoad() {
NotificationCenter.default.addObserver(self, selector: #selector(setImage), name: Notification.Name("UpdateImage"), object: nil)
}
#objc func setImage(){
self.imageViewToChange.image = UIImage(named: "rocket")
}
Then Send(Post) Notification from ThirdTableViewCell Class on #IBAction of UIButton
import UIKit
class ThirdTableViewCell: UITableViewCell {
override func awakeFromNib() {
super.awakeFromNib()
// Initialization code
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
// Configure the view for the selected state
}
#IBAction func onButtonClick(_ sender: Any) {
NotificationCenter.default.post(name: Notification.Name("UpdateImage"), object: nil)
}
}