Passing variables between View Controllers using a segue
First, setup property/properties to hold your variables in your second view controller (destination).
class YourSecondViewController: UIViewController { var duration:Double?}
Then have your button trigger your custom segue. Use your variable ('duration') as the argument for sender.
class YourFirstViewController: UIViewController { @IBAction func buttonTapped(sender: AnyObject) { self.performSegueWithIdentifier("MainToTimer", sender: duration) }}
Finally, pass this sender data by overriding the prepareForSegue method:
override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) { if (segue.identifier == "MainToTimer") { let secondViewController = segue.destinationViewController as YourSecondViewController let duration = sender as Double secondViewController.duration = duration }}
Yes, it is also possible to pass multiple variables and constants, again using the 'sender' parameter of prepareForSegue. If you have multiple data you want to pass in, put them in an array and make that array the sender.
SWIFT 3From Swift 3, the method prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!)
has changed to prepare(for segue: UIStoryboardSegue, sender: Any?)
In the first ViewController
place this (for modal segue):
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { let theDestination = (segue.destinationViewController as ViewController2) theDestination.Duration2 = Duration}
Change ViewController2
to the name of the second ViewController
. In ViewController2
create a class variable:
var Duration2 = (whatever the type - UInt8 I guess for time)
That's it. You will have in the value of Duration2
the value of Duration
from the first ViewController
.