Returning Bool from one class to another in Swift

Question

I have here a piece of code, and i can't seem to figure out why it doesn't work.

The viewController is supposed to check whether a switch is turned on or off.

class ViewControllerFirst: UIViewController {  


@IBAction func friendFunc(){
    if friendSwitch.on{
        friendOn = true
    }   else    {
        friendOn = false
    }
}

func returnFriend() -> Bool{
    return friendOn
    }
}

And if the switch is turned on, an Array should be added to tempArray.

import Foundation

struct DareBook {

let fview = ViewControllerFirst()
let dareArrayFriend = [""]

func randomDare() -> String{

    var tempArray = [""]
    if  ViewControllerFirst().returnFriend() == true{
        tempArray += dareArrayFriend
    }  
    var unsignedArrayCount = UInt32(tempArray.count)
    var unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
    var randomNumber = Int(unsignedRandomNumber)
    return tempArray[randomNumber]
    }
} 

i'm not getting any errormessages when i build, but it singles out this line:

    func returnFriend() -> Bool{

Answer 1

看起来您每次检查布尔值时都实例化一个新的视图控制器，（ ViewControllerFirst()似乎至少应该是fview ，我不认为fview是您想要的实际ViewController），所以似乎我认为这永远是错误的。

Answer 2

You are creating a new view controller when you call the function. That is probably not what you want.

func randomDare() -> String{

    var tempArray = [""]
    // if  ViewControllerFirst().returnFriend() == true{ <--- this line can't be right
    if  fview.returnFriend() == true{
        tempArray += dareArrayFriend
    }  
    var unsignedArrayCount = UInt32(tempArray.count)
    var unsignedRandomNumber = arc4random_uniform(unsignedArrayCount)
    var randomNumber = Int(unsignedRandomNumber)
    return tempArray[randomNumber]
    }
}