Error using Swift - Instance member cannot be used on type 'ViewController'

Question

I\'ve been trying to make an app in Xcode 7 using Swift and I\'m trying to convert numbers inside a textfield to an integer using this code, let a = Int(percentLabel.t

Answer 1

You cannot have these two lines outside of a function call in a class

let myString = percentLabel
let myInt: Int? = Int(myString)

You cannot intialise a property to a value of another property, you cannot set a variable's default value to that of another property. you would usually do this in a function like viewDidLoad or viewWillAppear. Arsen's answer should also work as it will try to get the value lazily, or as you request it.

let myString = percentLabel would also not return the text, you'd need to do let myString = percentLabel.text but you cannot assign this value like a property. you'll need to put his code in the body of a function

Answer 2

This code returns a new value every time you call it. I expect it what you're looking for

var myInt: Int? {
    return Int(percentLabel.text!)
}

instead of

let myString = percentLabel
let myInt: Int? = Int(myString)