iOS 11 Uibarbuttonitem Images Not Sizing

iOS 11 UIBarButtonItem images not sizing

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;
}

iOS 11 UIBarButtonItem ImageView size bug

In iOS 11 you must need us auto-layout instead of frames

Like below

    myButton.widthAnchor.constraint(equalToConstant: customViewButton.width).isActive = true
    myButton.heightAnchor.constraint(equalToConstant: customViewButton.height).isActive = true

How to set UIBarButton size in iOS 11 to match size in iOS 10

Your approach is correct: custom bar button items now do autolayout, so you must add constraints to set the size. This is a much-requested feature, so don't worry, be happy!

The constraints you must add are like the constraints for a table cell height: you must add sufficient constraints to size the bar button item's custom view completely from the inside out. For example, give it absolute width and height constraints, or give its contents width and height constraints plus constraints pinning them to the boundaries of the custom view itself.

Change size of UIBarButtonItem (image) in Swift 3

In the end I did it like this and it worked:

let moreButton = UIButton(frame: CGRect(x: 0, y: 0, width: 35, height: 35))
moreButton.setBackgroundImage(UIImage(named: "ic_more_vert_3"), for: .normal)
moreButton.addTarget(self, action: #selector(TableViewController.handleMore), for: .touchUpInside)
self.navigationItem.rightBarButtonItem = UIBarButtonItem(customView: moreButton)

Answer from: Change width of a UIBarButtonItem in a UINavigationBar in swift

iOS 11 navigation bar / uibarbutton items rendering issues

refer to UIBarButtonItem on iOS 11

UIBarButtonItem uses autolayout instead of dealing with frames.

That's why the button is got stretched .

Modify:

widthConstraint = leftBackBtn.WidthAnchor.ConstraintEqualTo(27);
heightConstraint = leftBackBtn.HeightAnchor.ConstraintEqualTo(20);
widthConstraint.Active = true;
heightConstraint.Active = true;

How big should a UIBarButtonItem image be?

As of iOS 11, the Human Interface Guidelines suggest glyphs be about 25×25 points in toolbars and navigation bars, up to a maximum of about 28 points. (And the HIG should definitely be in your bookmarks if you're working on iOS apps!)

That would translate to images 25px square for older devices like iPad 2 / Mini, 50px square for most current devices like iPhone 8 or iPad, and 75px square for Retina HD devices (the iPhone 6/7/8 Plus, or iPhone X). Asset catalogs will help immensely in keeping the different asset sizes organized (and Xcode can even generate them from vector sources these days).

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