setSelectionIndicatorImage is of wrong size for iphone 6 and iPhone 6+

Question

I am using following method to set selection indicator for selected tab bar item. It works well for iPhone 4/4s/5/5s but not in iphone 6/6+.

[[UITabBar appearan         


        

Answer 1

Here is my auto-adjusting UITabBarController subclass. Just provide an image and it will adjust to all known iPhones and iPads. It will also update the size whenever the trait collection changes so it supports all the new iPad features and rotation.

import UIKit

class TabBarController: UITabBarController {
    override func viewWillAppear(animated: Bool) {
        super.viewWillAppear(animated)

        updateSelectionIndicatorImage()
    }

    override func traitCollectionDidChange(previousTraitCollection: UITraitCollection?) {
        super.traitCollectionDidChange(previousTraitCollection)

        updateSelectionIndicatorImage()
    }

    func updateSelectionIndicatorImage() {
        let width = CGRectGetWidth(tabBar.bounds) > 420 ? 420 : CGRectGetWidth(tabBar.bounds)
        var selectionImage = UIImage(named: "TabSelectionIndicator")
        let tabSize = CGSizeMake(width/5, 49)

        UIGraphicsBeginImageContext(tabSize)
        selectionImage?.drawInRect(CGRectMake(0, 0, tabSize.width, tabSize.height))
        selectionImage = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()

        tabBar.selectionIndicatorImage = selectionImage
    }
}