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How do you solve this? The enformement of self inside initializers gets in the way sometimes.

Question.swift

import UIKit

class MyView: UIView {

    // I could define this as UIPanGestureRecognizer! but that feels like the wrong solution
    let panGestureRecognizer: UIPanGestureRecognizer

    init(frame: CGRect) {

        // Can't do this here because self is not initialized yet
        panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "handlePanGestureRecognizer")

        super.init(frame: frame)

        // Can't do this here because a `let` is required to be initialized before the super call
        panGestureRecognizer = UIPanGestureRecognizer(target: self, action: "handlePanGestureRecognizer")
    }

    func handlePanGestureRecognizer(gestureRecognizer: UIPanGestureRecognizer) {

    }
}

You could use @lazy for the property and initialise the property when you access it, no?

Seems crappy but you can do this:

panGestureRecognizer = UIPanGestureRecognizer(target: nil, action: "handlePanGestureRecognizer")
OR
panGestureRecognizer = UIPanGestureRecognizer()

And then actually assign it after the super call

Its arguable that you're conflating the duties of the view with that of the view controller and swift is trying to enforce that at compile time. Given that in theory views shouldn't know much about anything other than displaying content, the correct answer may be that the configuration of the gesture recognizer should happen externally and passed into the view, if indeed the view should be responsible for it going forward.

I don't believe the other solutions will help as I think initWithTarget with a nil parameter throws an exception and @lazy would require the gesture recognizer property to be accessed rather just being set up on the view.

my 2c