Passing data to table view controller

Question

I have a view controller, and I have one tableview inside this view controller. I am managing the table from table view controller. But I need to send data to tableview controller from view controller. How can I do this ?

This is my view controller:

class SettingsViewController: UIViewController {
...
}

And this is my table view controller:

class SettingsTableViewController:UITableViewController {


    @IBOutlet var notificationsSwitch: UISwitch!
    @IBAction func notificationsClicked(sender: UISwitch) {
        if notificationsSwitch.on {
            println("notifications on")
        }else{
            println("notifications off")
        }
    }

}

Storyboard:

enter image description here

@gutenmorgenuhu I tried but i am getting following error fatal error: unexpectedly found nil while unwrapping an Optional value How can I resolve ? — Okan
– Okan, Commented May 7, 2015 at 15:10
to answer that, we need more code: where does the error occur, when does it occur. etc — gutenmorgenuhu
– gutenmorgenuhu, Commented May 7, 2015 at 15:11

Ruud Kalis · Accepted Answer · 2015-05-07 15:34:56Z

1

Use action segues in combination with a prepareForSegue function. Described in this article:

Storyboards Tutorial in Swift: Part 2

Add an identifier for your push segue that opens the SettingsTableViewController and add the following function to ViewController.

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject!) {
    if segue.identifier == "unwindToTableView" {
        let destinationController = segue.destinationViewController as! SettingsTableViewController
        destinationController.notificationsSwitch.setOn(true, animated:true)
    }
}

Assuming that you want to pass some bool from the settingsViewController to the table, you will have something like:

var notifications: Bool = false

In the Interface builder, add an identifier to the push segue like this: Push segue identifier in IB

edit: slightly misunderstood the problem initially, since the data is not passed from SettingsTableViewController to settingsViewController but the other way around. Using segues and prepareForSegue is generally the way to pass on data to another viewController.

edit2: changed the way to set the switch in the prepareForSegue function.

edited May 7, 2015 at 15:34

answered May 7, 2015 at 15:22

Ruud Kalis

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10 Comments

Okan Over a year ago

I am not using segues for this operation. I couldn't understand you answer.

Ruud Kalis Over a year ago

segues are the way to go to pass on data between view controllers. I have edited my answer for your question.

Okan Over a year ago

I get it you now. But I have one more problem. I am getting data from server so I need to wait data then when it comes I need to use in segue. How can I do this ?

Firo Over a year ago

@RuudKalis, "are the way to go." Only IF you are using segues. (which I think the OP is using).

Ruud Kalis Over a year ago

Agree @Firo.. looking at the Okan's screenshot of the IB builder there is a push segue used to open the SettingsTableViewController.

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