Swift How can i get variable from another method in same class

Question

I'm a beginner of swift. I wrote code and one question. I want to get variable b from func A but I don't know how. How to get it.

/*This is extension from FirstViewController*/
extension FirstViewController{

    private func A() {
        let a:CGFloat  = view.frame.size.width
        let b:CGFloat  = view.frame.size.height
    }

    private func B() {
        self.Something.frame.size = CGSize(width: /*I want to get a in here*/, height: /*I want to get b in here*/)
    }

}

Answer 1

You can simply use a Tuple of type (CGFloat, CGFloat) to achieve that, i.e.

private func A() -> (a: CGFloat, b: CGFloat)
{
    let a:CGFloat  = view.frame.size.width
    let b:CGFloat  = view.frame.size.height
    return (a, b)
}

private func B()
{
    self.Something.frame.size = CGSize(width: self.A().a, height: self.A().b)
}

Answer 2

Note that the actual solution to your problem depends highly on what you actually want to do (your ultimate goal).

---

You can't access a or b in B because a and b are in a different scope from B. You can't access local variables declared in a function from another function.

To access them, you need to move a and b to a scope that is accessible by B. In this case, this can be the scope of the extension:

extension FirstViewController{
    var a: CGFloat { return view.frame.size.width }
    var b: CGFloat { return view.frame.size.height }
    private func A() {

    }

    private func B() {
        self.Something.frame.size = CGSize(width: a, height: b)
    }

}