Passing data between 2 view controllers in Swift

Question

I have 2 view controllers, created separately. It's not navigation controller or other. I've 2 files for each of them: ViewController.swift, SecondViewController.swift. Second VC is called audioList

In 1-st VC I have a button and by clicking on it I'm opening second VC using code

dispatch_sync(dispatch_get_main_queue(), { () -> Void in

    let storyboard = UIStoryboard(name: "Main", bundle: nil)
    let controller = storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as! SecondViewController
    self.presentViewController(controller, animated: true, completion: nil)

})

There is an array called music in SecondViewController. I want to fill it with elements before code which you can see upper - from 1-st VC.

I've read this and that one post, others, read about doing it by creating protocol with function which changes data, tried a lot with segues, their performing and prepareFor-functions - but nothing worked.

Help me please with filling array in 2-nd VC from button-click-action in 1-st VC

Update:

In SecondViewController.swift I have this code:

var music: [String] = ["test"]

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

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell
{
    let cell:UITableViewCell=UITableViewCell(style: UITableViewCellStyle.Subtitle, reuseIdentifier: "mycell")
    cell.textLabel!.text = music[indexPath.row]

    return cell
}

TheNiers · Accepted Answer · 2015-08-14 14:41:30Z

Create and fill an array on your first view controller. Then declare an array of the same structure on your second view controller. Then fill it in the segue.

VC1:

    var music : [String] = ["Song1", "song2", "Song3"]

    dispatch_sync(dispatch_get_main_queue(), { () -> Void in

                            let storyboard = UIStoryboard(name: "Main", bundle: nil)
                            let controller = storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as! SecondViewController

                            controller.music2 = self.music

                            self.presentViewController(controller, animated: true, completion: nil)
                        })

VC2:

    import UIKit

        class audioList: UIViewController {
        var music2 : [String] 

        viewDidLoad()
        {

        }
}

Chris · Accepted Answer · 2015-08-14 14:34:25Z

2

let storyboard = UIStoryboard(name: "Main", bundle: nil)
let controller = storyboard.instantiateViewControllerWithIdentifier("SecondViewController") as! SecondViewController
controller.music = ["my", "data"]
self.presentViewController(controller, animated: true, completion: nil)

answered Aug 14, 2015 at 14:34

Chris

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2 Comments

SwiftStudier Over a year ago

That's pity but it does not work too. I've updated my post with code form 2-nd VC, maybe something wrong with printing data to tableView. But after 2-VC opened I see only "test"

Chris Over a year ago

Can you upload your project?

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