Click on UIButton outside table view change in tableview cell text - swift

Question

I am new in IOS and i want to create a table view and a UIButton outside from tableView in swift.
I want to click on a UIButton and then change text of UITableViewCell.

Answer 1

I would create new UIViewController. In this view controller create UITableView property and UIButton property and in init of view controller I would create new UITableView and assign to this property, same for UIButton.
Implement tableViewDelegate and tableViewDatasource methods.
In viewDidLoad() you need to make some layouting. For example fit table view in first half, and button under table view.
In button action you can change your dataModel on which tableView is rendered. (In method cellForRowAtIndexPath)
After all you need is call tableView.reloadData() and method cellForRowAtIndexPath is triggered and re-render table based on updated datamodel.
Minimal code example
In this code example, UIButton is not under tableView and is in navigationBar. Also whole controller is subclass of UITableViewController instead of adding tableView to UIViewController. I just want to make it simple as possible.
//
// MasterViewController.swift
// stackOverflow
//
// Created by Jakub Prusa on 14.07.17.
// Copyright © 2017 Jakub Prusa. All rights reserved.
//
import UIKit
class MasterViewController: UITableViewController {
var dataModel = ["AAA","BBB","CCC","DDD",]
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let addButton = UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(modifyDataModel(_:)))
navigationItem.rightBarButtonItem = addButton
}
// MARK: - Button action
func modifyDataModel(_ sender: Any) {
dataModel[2] = "xx_CCC_xx"
tableView.reloadData()
}
// MARK: - Table View
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return dataModel.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "Cell", for: indexPath)
cell.textLabel!.text = dataModel[indexPath.row]
return cell
}
}