UIAlertController change font color

Question

Here\'s my code that creates the UIAlertController

    // Create the alert controller
    var alertController = UIAlertController(title: \"Are you sure you want          


        

Answer 1

Here's an update for Swift 4, using Cody's answer as a base:

Setting a colour for the alert title:

alert.setValue(NSAttributedString(string: alert.title!, attributes: [NSAttributedStringKey.font : UIFont.systemFont(ofSize: 17, weight: UIFont.Weight.medium), NSAttributedStringKey.foregroundColor : UIColor.blue]), forKey: "attributedTitle")

Setting a colour for the alert message:

alert.setValue(NSAttributedString(string: alert.message, attributes: [NSAttributedStringKey.font : UIFont.systemFont(ofSize: 17, weight: UIFont.Weight.Medium), NSAttributedStringKey.foregroundColor : UIColor.green]), forKey: "attributedMessage")

As per https://developer.apple.com/documentation/foundation/nsattributedstring/key

Answer 2

Below code is changing the UIAlertView title color.

  let alert = UIAlertController(title: messageTitle, message: messageText, preferredStyle: UIAlertControllerStyle.Alert)

  alert.setValue(NSAttributedString(string: messageTitle, attributes: [NSFontAttributeName : UIFont.systemFontOfSize(17),NSForegroundColorAttributeName : UIColor.redColor()]), forKey: "attributedTitle")

  alert.addAction(UIAlertAction(title: buttonText, style: UIAlertActionStyle.Default, handler: nil))

  parent.presentViewController(alert, animated: true, completion: nil)

If you want to change button color then add following code after present View Controller.

  alert.view.tintColor = UIColor.redColor()

Answer 3

In Swift 5 and XCode 11.1 and later, colour for the alert title:

alert.setValue(NSAttributedString(string: alert.title!, attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 25, weight: UIFont.Weight.medium), NSAttributedString.Key.foregroundColor : UIColor.red]), forKey: "attributedTitle")

Colour for the alert message:

alert.setValue(NSAttributedString(string: alert.message!, attributes: [NSAttributedString.Key.font : UIFont.systemFont(ofSize: 20,weight: UIFont.Weight.medium),NSAttributedString.Key.foregroundColor :UIColor.black]), forKey: "attributedMessage")

Answer 4

Before iOS 9.0 you could simply change the underlying view's tintColor like this:

alertController.view.tintColor = UIColor.redColor()

However, due to a bug introduced in iOS 9, you can either:

1. Change the app tintColor in the AppDelegate.

   func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject : AnyObject]?) -> Bool {
       self.window.tintColor = UIColor.redColor()
       return true
   }
   

2. Reapply the color in the completion block.

   self.presentViewController(alert, animated: true, completion: {() -> Void in
       alert.tintColor = UIColor.redColor()
   })
   

See my other answer here: https://stackoverflow.com/a/37737212/1781087

Answer 5

Piyush's answer helped me the most, but here are some tweaks for Swift 3 and to change the title and message separately.

Title:

alert.setValue(NSAttributedString(string: alert.message, attributes: [NSFontAttributeName : UIFont.systemFont(ofSize: 29, weight: UIFontWeightMedium), NSForegroundColorAttributeName : UIColor.red]), forKey: "attributedTitle")

Message:

alert.setValue(NSAttributedString(string: alert.message, attributes: [NSFontAttributeName : UIFont.systemFont(ofSize: 29, weight: UIFontWeightMedium), NSForegroundColorAttributeName : UIColor.red]), forKey: "attributedMessage")

The big font size is because I actually needed to do it for tvOS, works great on it and iOS.

Answer 6

After some trial and error, I found this worked. Hopefully this will help future swift newcomers!

alertController.view.tintColor = UIColor.blackColor()