Remove spacing between tab bar items (left and right)

Question

How to remove spacing between tab bar items when using the "fill" value on the "item position" option?

I've tried the following:

    let tabBarController = window!.rootViewController as! UITabBarController
    tabBarController.tabBar.itemSpacing = 0
    let numberOfItems = CGFloat(tabBarController.tabBar.items!.count)
    let tabBarItemSize = CGSize(width: tabBarController.tabBar.frame.width / numberOfItems, height: tabBarController.tabBar.frame.height)
    tabBarController.tabBar.selectionIndicatorImage = UIImage.imageWithColor(color: UIColor.secondaryHighlight(), size: tabBarItemSize).resizableImage(withCapInsets: UIEdgeInsets.zero)
    for item in tabBarController.tabBar.items! {
        item.imageInsets = UIEdgeInsetsMake(0, 0, 0, 0)
    }

extension UIImage {

    class func imageWithColor(color: UIColor, size: CGSize) -> UIImage {
        let rect: CGRect = CGRect(x: 0, y: 0, width: size.width, height: size.height)
        UIGraphicsBeginImageContextWithOptions(size, false, 0)
        color.setFill()
        UIRectFill(rect)
        let image: UIImage = UIGraphicsGetImageFromCurrentImageContext()!
        UIGraphicsEndImageContext()
        return image
    }

}

This result is always this (note the green line on the left of the first tab bar item):

Answer 1

You can play with title offset that affects on image too:

    tabBar.items!.first?.titlePositionAdjustment = UIOffsetMake(30.0, 0.0);
    tabBar.items!.last?.titlePositionAdjustment = UIOffsetMake(-30.0, 0.0);

In this case result will be:

How it work with three items: