Building a titleView programmatically with constraints (or generally constructing a view with constraints)

Question

I\'m trying to build a titleView with constraints that looks like this:

I know how I would do

Answer 1

I really needed constraints, so played around with it today. What I found that works is this:

    let v  = UIView()
    v.translatesAutoresizingMaskIntoConstraints = false
    // add your views and set up all the constraints

    // This is the magic sauce!
    v.layoutIfNeeded()
    v.sizeToFit()

    // Now the frame is set (you can print it out)
    v.translatesAutoresizingMaskIntoConstraints = true // make nav bar happy
    navigationItem.titleView = v

Works like a charm!