How to alter app colors on iPhone running iOS 18? Discover easy tweaks

How to alter app colors on iPhone running iOS 18? Discover easy tweaks

If you’re an iOS developer looking to alter app colors on your iPhone running iOS 18, you’re in luck! In this article, we’ll cover some easy tweaks that will allow you to customize the look and feel of your apps without having to delve into the code.

Before We Begin: Understanding Color Themes

Before diving into the specific tweaks, it’s important to understand what color themes are in iOS. A color theme is a set of colors that are used throughout an app, including backgrounds, text, buttons, and more. Apple provides several built-in color themes, but you can also create your own.

How to Create a Custom Color Theme

To create a custom color theme, follow these steps:

  1. Open the Settings app on your iPhone.
  2. Scroll down and tap “Display & Brightness.”
  3. Tap “True Tone.”
  4. Toggle True Tone off.
  5. Select “Custom Colors” and choose a color that you like for the white balance of your screen.
  6. Go back to “Settings” and scroll down to “Appearance.”
  7. Tap “Display.”
  8. Scroll down to “Brightness & Contrast.”
  9. Adjust the brightness and contrast settings to your preference.
  10. Finally, go to “Accessibility” > “Display Colors” and toggle it on. You can now see which colors you’ve chosen for the white balance of your screen.

Now that you have a custom color theme set up, let’s move on to some easy tweaks to alter app colors.

1. Use Custom UIKit Colors

If you want to change the color of buttons or other UI elements in your app, you can use custom UIKit colors. To do this, simply create a new instance of <code>UIColor</code> and set its value to the color you want to use. For example:

<code>let myButton = UIButton()</code>
myButton.backgroundColor = UIColor.red // Change this to any other color you prefer

2. Use Custom UITableViewCell Colors

If you want to change the color of cells in a <code>UITableView</code>, you can use custom cell styles. To do this, create a new subclass of <code>UITableViewCell</code> and override the <code>cellForRowAt(_:)</code> method:

<code>class MyTableViewCell: UITableViewCell {</code>
    @IBOutlet weak var myLabel: UILabel!

    override func cellForRowAt(_ indexPath: IndexPath) -> UITableViewCell {
        let cell = self.style(for: indexPath)
        cell.myLabel.textColor = UIColor.blue // Change this to any other color you prefer
        return cell
    }
}

3. Use Custom UICollectionViewCell Colors

If you want to change the color of cells in a <code>UICollectionView</code>, you can use custom cell styles in a similar way:

<code>class MyCollectionViewCell: UICollectionViewCell {</code>
    @IBOutlet weak var myLabel: UILabel!

    override func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        let cell = self.style(for: indexPath)
        cell.myLabel.textColor = UIColor.green // Change this to any other color you prefer
        return cell
    }
}

4. Use Custom UINavigationController Colors

If you want to change the color of the navigation bar in your app, you can use a custom <code>UINavigationController</code>. To do this, create a new instance of <code>UINavigationController</code> and set its delegate to an instance of your class. Then, override the <code>navigationItem(_:willShowViewController:animated:)</code> method:

<code>class MyViewController: UIViewController {</code>
    override func viewDidLoad() {
        super.viewDidLoad()

        let navController = UINavigationController(rootViewController: self)
        navController.delegate = self

        // Set the navigation bar color
        navController.navigationBar.barTintColor = UIColor.orange
    }


How to alter app colors on iPhone running iOS 18? Discover easy tweaks

    func navigationItem(_ item: UINavigationItem, willShow viewController: UIViewController) {
        // Add any additional code here
    }
}

5. Use Custom UIAlertController Colors

If you want to change the color of buttons in an <code>UIAlertController</code>, you can use custom styles. To do this, create a new subclass of <code>UIAlertController</code> and override the <code>alertController(_:title:message:preferredStyle:)</code> method:

<code>class MyAlertController: UIAlertController {</code>

    @IBOutlet weak var myButton: UIAlertAction!


    override func alertController(_ alertController: UIAlertController, title: String?, message: String?, preferredStyle: UIAlertController.Style) -> UIAlertController {

        let customTitle = "Custom Title" // Change this to any other title you prefer

        let customMessage = "Custom Message" // Change this to any other message you prefer


        // Set the button color

        myButton.titleTextColor = UIColor.purple


        return alertController(title: customTitle,

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