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functionmethodsswiftparent

initiate parent method from child view SWIFT

I'm looking for the best possible way to initiate a parent method from a child's view controller.

The parent is a scroll view with three UIViewController children nested inside. The code to have them initialized and attached works fine... just can't seem the find a way to call methods of parent.

thanks in advance!

Solution

  • A generic way to call (public/internal) methods in a parent from a child or another class entirely is to save a reference to the parent in the child

    class parent { 
    ...

    internal func doSomething() { 
        println("Did something...")
    }
}

class child {
    let pReference: parent

    init(p: parent) {
        self.pReference = p
    }

    internal func callInParent() {
        self.pReference.doSomething()
    }
}

let x = parent()
let y = child(x)
y.callInParent() // prints "Did something..."

    This is easy to practise inside a playground. Give it a go.