In this blog post, we'll explore how to extend the functionality of UILabel in Swift by adding a strikethrough text feature. We'll provide a real-world example of how this can be used and provide code examples to help you implement it in your own iOS applications.
The Problem
In many iOS applications, you may need to display text with a strikethrough style to indicate that it's no longer relevant or has been updated. While UILabel is a common choice for displaying text, it doesn't natively support strikethrough text. To address this limitation, we can create an extension for UILabel to add the strikethrough functionality.
The Solution
We'll start by creating an extension for UILabel that allows us to easily apply a strikethrough style to the label's text. Here's the Swift code for the extension:
In this code, we define an addStrikethrough method for UILabel. This method takes two parameters: strikethroughStyle (an NSUnderlineStyle) and strikethroughColor (a UIColor). It applies a strikethrough style to the label's text by creating a NSMutableAttributedString, adding the appropriate attributes (strikethrough style and color), and setting the attributed text back to the label.
Real-World Example
Now, let's see how we can use this extension in a real-world example. Imagine you have a to-do list app, and you want to display completed tasks with a strikethrough style to visually indicate their completion status. Here's how you can achieve this:
In this example, we have a ProductViewController with two UILabels: originalPriceLabel and discountedPriceLabel. The originalPriceLabel is used to display the original price of a product, which we want to indicate as discounted. We apply the strikethrough style and a red color to this label using our addStrikethrough extension method.
The result will be that the original price $200 is displayed with a strikethrough, indicating that it was the original price, while the discounted price $150 is shown as the current discounted price.
This approach is commonly used in e-commerce apps to highlight discounts and special offers, making it easier for users to see the difference in pricing.
By extending UILabel with the addStrikethrough method, you can easily enhance your iOS applications to display strikethrough text when needed. This feature can be particularly useful for to-do lists, shopping apps, or any application where you want to visually indicate completed or outdated information. Feel free to use and adapt this code to suit your specific needs and create a more user-friendly and informative interface in your iOS apps.
The result will be that the original price $200 is displayed with a strikethrough, indicating that it was the original price, while the discounted price $150 is shown as the current discounted price.
This approach is commonly used in e-commerce apps to highlight discounts and special offers, making it easier for users to see the difference in pricing.
By extending UILabel with the addStrikethrough method, you can easily enhance your iOS applications to display strikethrough text when needed. This feature can be particularly useful for to-do lists, shopping apps, or any application where you want to visually indicate completed or outdated information. Feel free to use and adapt this code to suit your specific needs and create a more user-friendly and informative interface in your iOS apps.
