Swift - How to check if TableView is empty

Question

So i'm making this ToDo-list app. This app has local notifications, but i only want them to pop-up if the tableview is empty. To keep it short : How do i check if the tableview is empty?

This is my current code :

import UIKit

class FirstViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {


@IBOutlet var tblTasks : UITableView!
@IBOutlet weak var countLbl: UILabel!
 var localNotification = UILocalNotification()

//For persisting data
let defaults = NSUserDefaults.standardUserDefaults()

override func viewDidLoad() {
    super.viewDidLoad()
    self.tblTasks.reloadData()


    // localNotification.alertAction = "Je hebt nog taken die gedaan moeten worden!"
    localNotification.alertBody = "Je hebt nog taken die gedaan moeten worden! Namelijk nog \(updateCount)"
    localNotification.timeZone = NSTimeZone.localTimeZone()

    localNotification.fireDate = NSDate(timeIntervalSinceNow: 10)
    UIApplication.sharedApplication().scheduleLocalNotification(localNotification)

}

override func viewWillAppear(animated: Bool) {
    self.tblTasks.reloadData()
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}


func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
    return taskMgr.tasks.count

}

//Define how our cells look - 2 lines a heading and a subtitle
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell{
    let cell: UITableViewCell = UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "Default Tasks")

    //Assign the contents of our var "items" to the textLabel of each cell
    cell.textLabel!.text = taskMgr.tasks[indexPath.row].name
    cell.detailTextLabel!.text = taskMgr.tasks[indexPath.row].description
    cell.backgroundColor = UIColor.clearColor()

    return cell

}

func tableView(tableView: UITableView, commitEditingStyle editingStyle: UITableViewCellEditingStyle, forRowAtIndexPath indexPath: NSIndexPath){

    if (editingStyle == UITableViewCellEditingStyle.Delete){

        taskMgr.removeTask(indexPath.row)
        tblTasks.reloadData()
    }

}

Anyone who can help me? Thanks ;)

Solution 1

In Swift 3:

if tableView.visibleCells.isEmpty {
    //tableView is empty. You can set a backgroundView for it.
} else {
    //do something
}

Solution 2

You should check taskMgr.tasks.count value.

Solution 3

func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int{
    if taskMgr.tasks.count == 0 {
       //table view is empty here
    }
    return taskMgr.tasks.count    
}

Solution 4

.. if TableView is empty.

There is a boolean property with the same name , to be called on the data source array.

It's true if the array contains no elements.

taskMgr.tasks.isEmpty

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Comments

[rmaddy]

@Jenoah Don't forget to accept the answer that best solved your issue.

[Vinu David Jose]

This one is deprecated in iOS 13. we cant check this while they were in the process of being updated