How to Force a UIButton to Display a Single Line of Text with Ellipsis in Swift

Learn how to limit a UIButton's title to a single line in Swift, ensuring that any overflow is represented with an ellipsis for better UI design.
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This video is based on the question https://stackoverflow.com/q/72187369/ asked by the user 'Mousa AminSharifi' ( https://stackoverflow.com/u/11851153/ ) and on the answer https://stackoverflow.com/a/73864847/ provided by the user 'Mousa AminSharifi' ( https://stackoverflow.com/u/11851153/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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How to Force a UIButton to Display a Single Line of Text with Ellipsis in Swift

When it comes to designing user interfaces for iOS applications, ensuring your UI elements look polished and consistent is crucial. One common challenge developers face is controlling how text is displayed on buttons, especially when the title could potentially exceed the available space. In this guide, we’ll address a specific issue related to forcing a UIButton to only show one line of text, and if the text is too long, display an ellipsis (...) to indicate truncation.

The Problem

You might find yourself in a situation where you want your UIButton to only have one line of text. However, using the usual settings for the button may still yield a multi-line title. This can happen for various reasons, including UIButton style settings or text handling configurations.

Here’s a brief overview of the code that didn't produce the expected outcome:

[[See Video to Reveal this Text or Code Snippet]]

Despite attempting to limit the title to a single line, the UIButton might still display the text in multiple lines, failing to achieve the desired visual effect.

The Solution

The solution to this problem lies primarily in two key areas: line break mode and the button style. Let’s break it down.

Step 1: Change Button Style

One of the most significant aspects that affect how text is rendered in a UIButton is its style. By default, the UIButton style may not properly support single-line text truncation. Here’s how to set it up correctly:

Change the UIButton's style from plain to default to ensure it supports the required configurations.

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Configure Title Properties

lineBreakMode: Set your UIButton’s title label’s line break mode to .byTruncatingTail if you want truncation to occur at the end of the title, which adds an ellipsis when the text is too lengthy.

numberOfLines: Use 1 to ensure that only a single line is allowed for the button’s title.

textAlignment: Make sure that your title’s text is centered or aligned as per your design needs.

Example Code Implementation

Here’s a concise code snippet putting it all together:

[[See Video to Reveal this Text or Code Snippet]]

Summary

By applying the changes outlined above, you can effectively force your UIButton to display a single line of text. This not only enhances the aesthetics of your app’s UI but also ensures a better user experience by maintaining a consistent layout. Remember, effectively communicating information through your UI elements is essential for usability.

Now your UIButton will look and behave just as you intended, displaying a single line of text and adding an ellipsis where needed. Happy coding!

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