How to detect tableView cell touched or clicked in swift

I'm trying to get index of selected item in TableView and start some activity after that. Unfortunately most of solutions that I found are in objective-c or do not work.

Method func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) don't print the cell label..

Can somebody help me please?

import UIKit
import ResearchKit


class TaskListViewController: UIViewController, UITableViewDataSource {
    

let tasks=[("Short walk"),
("Audiometry"),
("Finger tapping"),
("Reaction time"),
("Spatial span memory")
]
    

    

//how many sections are in your table
func numberOfSectionsInTableView(tableView: UITableView) -> Int {
return 1
}
    

//return int how many rows
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tasks.count
}
    

//what are the contents
    

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell = UITableViewCell()
        

var (testName) = tasks[indexPath.row]
cell.textLabel?.text=testName
return cell
}
    

// give each table section a name
    

func tableView(tableView: UITableView, titleForHeaderInSection section: Int) -> String? {


return "Tasks"
        

}
    

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        

let indexPath = tableView.indexPathForSelectedRow();
        

let currentCell = tableView.cellForRowAtIndexPath(indexPath!) as UITableViewCell!
        

println(currentCell.textLabel!.text)
}
    

    

override func viewDidLoad() {
super.viewDidLoad()
        

}
}

After a few tries I changed the code to a different one from tutorial that I found. And it doesn't work too. Now I'm thinking this is the issue with iOS simulator...

import UIKit
import ResearchKit


class TaskListViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {
    

@IBOutlet
var tableView: UITableView?
var items: [String] = ["We", "Heart", "Swift"]
    

override func viewDidLoad() {
super.viewDidLoad()
        

self.tableView!.registerClass(UITableViewCell.self, forCellReuseIdentifier: "cell")
}
    

    

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return self.items.count;
}
    

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
var cell:UITableViewCell = self.tableView!.dequeueReusableCellWithIdentifier("cell") as! UITableViewCell
        

cell.textLabel?.text = self.items[indexPath.row]
        

return cell
}
    

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
println("You selected cell #\(items[indexPath.row])!")
}
    

}
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最佳答案

If you want the value from cell then you don't have to recreate cell in the didSelectRowAtIndexPath

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
println(tasks[indexPath.row])
}

Task would be as follows :

let tasks=["Short walk",
"Audiometry",
"Finger tapping",
"Reaction time",
"Spatial span memory"
]

also you have to check the cellForRowAtIndexPath you have to set identifier. 

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("CellIdentifier", forIndexPath: indexPath) as UITableViewCell
var (testName) = tasks[indexPath.row]
cell.textLabel?.text=testName
return cell
}

Hope it helps.

小开

Problem was solved by myself using tutorial of weheartswift

enter image description here

小开

In Swift 3.0

You can find the event for the touch/click of the cell of tableview through it delegate method. As well, can find the section and row value of the cell like this.

override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("section: \(indexPath.section)")
print("row: \(indexPath.row)")
}
小开

This worked good for me:

    override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("section: \(indexPath.section)")
print("row: \(indexPath.row)")
}

The output should be:

section: 0
row: 0
小开

A of couple things that need to happen...

  1. The view controller needs to extend the type UITableViewDelegate

  2. The view controller needs to include the didSelectRowAt function.

  3. The table view must have the view controller assigned as its delegate.

Below is one place where assigning the delegate could take place (within the view controller).

override func loadView() {
tableView.dataSource = self
tableView.delegate = self
view = tableView
}

And a simple implementation of the didSelectRowAt function.

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
print("row: \(indexPath.row)")
}
小开 
 # Check delegate? first must be connected owner of view controller


# Simple implementation of the didSelectRowAt function.


func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
print("row selection: \(indexPath.row)")
}
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To get an elements from Array in tableView cell touched or clicked in swift

func tableView(_ tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCellWithIdentifier("CellIdentifier", forIndexPath: indexPath) as UITableViewCell
cell.textLabel?.text= arr_AsianCountries[indexPath.row]
return cell
}


func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let indexpath = arr_AsianCountries[indexPath.row]
print("indexpath:\(indexpath)")
}
小开

Inherit the tableview delegate and datasource. Implement delegates what you need.

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

And Finally implement this delegate

     func tableView(_ tableView: UITableView, didSelectRowAt
indexPath: IndexPath) {
print("row selected : \(indexPath.row)")
}
小开

I screw up on the every time! Just make sure the tableView delegate and dataSource are declared in viewDidLoad. Then I normally populate a few arrays to simulate returned data and then take it from there!

//******** Populate Table with data ***********
public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell{


let cell = tableView.dequeueReusableCell(withIdentifier: "Cell") as? SetupCellView
cell?.ControllerLbl.text = ViewContHeading[indexPath.row]
cell?.DetailLbl.text = ViewContDetail[indexPath.row]
cell?.StartupImageImg.image = UIImage(named: ViewContImages[indexPath.row])
return cell!
}

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