Swift EXC_BREAKPOINT when assigning viewcontroller to variable in prepareForSegue

ios, swift

Solution

In your case destination controller is navigation controller not your LoggedInViewController , So `segue.destinationViewController as LoggedInViewController` is an error , therefore it is crashing.

Try like this

override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) {
    if segue.identifier == "LoginSegue"{
            let navigationController = segue.destinationViewController as UINavigationController

        let vc = navigationController.topViewController as LoggedInViewController
        vc.email = emailTextfield.text

    }
}

Problem

Im getting an error when trying to perform a variable assignment with my destinationViewController. The error message is this: Thread 1: EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0) This in my prepareForSegue function. ``` override func prepareForSegue(segue: UIStoryboardSegue!, sender: AnyObject!) { if segue.identifier == "LoginSegue"{ let vc = segue.destinationViewController as LoggedInViewController vc.email = emailTextfield.text } } ``` In the other file it looks like this. ``` var email: String? ``` which is at the top. Then this: ``` override func viewDidLoad() { super.viewDidLoad() println("Email is:") println(email) println("Email was") } ``` But i never come into the second file. It is the line let vc = segue.destinationViewController as LoggedInViewController that is marked with error. Both swift files are connected to navigation controllers. I dont know what more you need, but I will of course post all code you need to understand! Thanks!

Original source