使用多个ViewController初始化类问题（Swift）

Question

I'm working with two view controllers in my XCode project. I passed a variable from the first View Controller to the second. And I keep getting this Swift Complier Error: "Class SecondViewController has no initializers" Fix-it > Stored property 'XScore' without initial value prevents synthesised initializers .

This is how I passed the variable in the FirstViewController:

override func prepareForSegue(Segue: UIStoryboardSegue, sender: AnyObject?) {
    var Destination = (Segue.destinationViewController as SecondViewController)

    Destination.XScore = Score

    }

This is (part of) my Second View Controller:

class SecondViewController: UIViewController {

@IBOutlet weak var XScoreLabel: UILabel!

var XScore:Double = 0.00

I have tried many different ways to initialize this property even when it seems right to me without.

Thanks in advance.

Answer 1

You have a couple of problems. As Gabe points out, you are casting your destination as a type SecondViewController , but are showing code for a different class, ShopViewController .

You need to show us the declaration of XScore in SecondViewController .

If it's defined (in SecondViewController) as

var XScore:Double 

then change it to

var XScore:Double  = 0

or

var XScore:Double? = nil 

(to allow for nil values)