Default tab bar item colors using swift Xcode 6

by

Each (default) tab bar item consists of text and icon. It is pretty easy to change the text colors globally by specifying the appearance:

// you can add this code to you AppDelegate application:didFinishLaunchingWithOptions: 
// or add it to viewDidLoad method of your TabBarController class
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.magentaColor()], forState:.Normal)
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.redColor()], forState:.Selected)

With images situation is a little bit more complicated. You cannot define their appearance globally. You should redefine them in your TabBarController class. Add code bellow to viewDidLoad method of your TabBarController class:

for item in self.tabBar.items as [UITabBarItem] {
    if let image = item.image {
        item.image = image.imageWithColor(UIColor.yellowColor()).imageWithRenderingMode(.AlwaysOriginal)
    }
}

As we know there is no imageWithColor(...) method in UIImage class. So here is the extension implementation:

// Add anywhere in your app
extension UIImage {
    func imageWithColor(tintColor: UIColor) -> UIImage {
        UIGraphicsBeginImageContextWithOptions(self.size, false, self.scale)

        let context = UIGraphicsGetCurrentContext() as CGContextRef
        CGContextTranslateCTM(context, 0, self.size.height)
        CGContextScaleCTM(context, 1.0, -1.0);
        CGContextSetBlendMode(context, .Normal)

        let rect = CGRectMake(0, 0, self.size.width, self.size.height) as CGRect
        CGContextClipToMask(context, rect, self.CGImage)
        tintColor.setFill()
        CGContextFillRect(context, rect)

        let newImage = UIGraphicsGetImageFromCurrentImageContext() as UIImage
        UIGraphicsEndImageContext()

        return newImage
    }
}

imageWithColor was borrowed from this answer: https://stackoverflow.com/a/24545102/3050466

More Related Contents:

  1. Importing Project-Swift.h into a Objective-C class…file not found
  2. Xcode beta 6 iOS 8: Simulator not working
  3. How to I import 3rd party frameworks into Xcode Playground?
  4. Xcode Version 6.1 (6A1030) – Apple Mach O-Linker Error – Building
  5. Remove println() for release version iOS Swift
  6. What is “Constrain to margin” in Storyboard in Xcode 6
  7. Why isn’t ProjectName-Prefix.pch created automatically in Xcode 6?
  8. Add an element to an array in Swift
  9. Xcode, where to assign the segue identifier
  10. Swift 4 “This class is not key value coding compliant”
  11. How to create IPA in Xcode 6?
  12. how to use writeToFile to save image in document directory?
  13. ViewDidAppear is not called when opening app from background
  14. How to use generic protocol as a variable type
  15. Xcode NSManagedObject subclass contains optionals when they are marked as non-optional
  16. dyld: Library not loaded: @rpath/libswiftCore.dylib / Image not found
  17. Xcode 9 Swift Language Version (SWIFT_VERSION)
  18. Dynamic Height Issue for UITableView Cells (Swift)
  19. didReceiveRemoteNotification not working in the background
  20. Passing parameters to a method called by NSTimer in Swift
  21. Xcode 9 – failed to emit precompiled header [duplicate]
  22. How can I change height of Navigation Bar – Swift 3
  23. Swift ios check if remote push notifications are enabled in ios9 and ios10
  24. How to display clickable links in UITextView
  25. xcode 7.1 swift framework app builds but not archiving
  26. Create and perform segue without storyboards
  27. Xcode 6: can’t connect any IBOutlet to ViewController
  28. Setting up UIScrollView to swipe between 3 view controllers
  29. arc4random_uniform not available in Xcode 7.0 beta (7a176x) on OSX 10.10.4
  30. Can we detect whether a user left through the home button or lock button without listening to darwin notifications?

Leave a Comment