iOS 11 UIBarButtonItem images not sizing

Question

The answer to my question was hinted at in this question, so I think the answer is to disable autolayout for my UIToolbar view.

The code that is said to work for vi

Answer 1

Fallstreak answer (+1) was the solution in my case. I was having a custom view not work on tap. Just wanted to share what I had to do for a custom view in a navigation item to work. This is all swift 3

let backButtonView = BackButtonView.loadNib()
backButtonView?.addTarget(self, action: #selector(returnToPrevious), for: .touchUpInside)
backButtonView.widthAnchor.constraint(equalToConstant: backButtonView.frame.width).isActive = true
backButtonView.heightAnchor.constraint(equalToConstant: backButtonView.frame.height).isActive = true
self.navigationItem.leftBarButtonItem = UIBarButtonItem(customView: backButtonView!)

The 2 lines about the anchor width/height came from Fallstreak's answer and were the solution in this case.

Answer 2

BarButtonItem (iOS11\xCode9) uses autolayout instead of frames. Try this (Swift):

if #available(iOS 9.0, *) {
    cButton.widthAnchor.constraint(equalToConstant: customViewButton.width).isActive = true
    cButton.heightAnchor.constraint(equalToConstant: customViewButton.height).isActive = true
}

Objective C

if (@available(iOS 9, *)) {
     [cButton.widthAnchor constraintEqualToConstant: standardButtonSize.width].active = YES;
     [cButton.heightAnchor constraintEqualToConstant: standardButtonSize.height].active = YES;
}