Скачать или смотреть How to Effectively Change UILabel Attributes in Swift 5 Programmatically

Discover how to easily change attributes of a UILabel within a UIStackView in Swift 5 with this comprehensive guide.
---
This video is based on the question https://stackoverflow.com/q/63322791/ asked by the user 'Aptyxx' ( https://stackoverflow.com/u/8653359/ ) and on the answer https://stackoverflow.com/a/63322909/ provided by the user 'Sweeper' ( https://stackoverflow.com/u/5133585/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: How do I change the attributes of a UILabel with a custom programmatic UIView [Swift 5]

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Effectively Change UILabel Attributes in Swift 5 Programmatically

Are you working on a Swift 5 project and trying to customize your UI elements programmatically? One common challenge is modifying the attributes of a UILabel that is embedded within a UIStackView. If you've found yourself wondering how to access and update UILabel properties when it's defined inside another view like a UIStackView, you're not alone! In this guide, I’ll walk you through an effective solution to this problem.

Understanding the Problem

When designing a user interface programmatically in Swift, you might start by creating a UIStackView and adding a UILabel as one of its subviews. However, if the UILabel is defined inside the stack view's initialization closure, accessing it later can pose a challenge. For example, if you create the UILabel inside a closure, it won't be accessible to other functions or parts of your code, making updates tricky.

Example of the Initial Setup

In this initial setup, the UILabel is created and assigned a default text:

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

The Challenge

The issue arises when you want to change the text of lbl, as shown in the function below:

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

Since lbl was declared locally within the closure for viewLeft1, it is not accessible in updateLabel1() or elsewhere in your code.

The Solution: Define UILabel as a Property

To solve this issue, we can take a straightforward approach by defining UILabel as a class property. This way, lbl can be referenced later from any function within the same class.

Step-by-Step Implementation

Declare UILabel as a Property: Declare your UILabel as a property of the class instead of within a setup closure.

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

Add UILabel to UIStackView: Next, create your UIStackView and add the label to this stack view within your initializer where you are setting up your views.

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

In your initializer:

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

Update the Label: Now that label is a property of your class, you can update it whenever you need. For instance:

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

This way, label can be accessed anywhere within your class, making it easy to update its text or other attributes as needed.

Conclusion

By defining your UILabel as a property of your class, you can easily manage and update its attributes without running into accessibility issues. This method keeps your code organized and simplifies the process of managing UI components in Swift 5.

Feel free to reach out if you have any questions or need further clarification on programmatically building UIs in Swift! Happy coding!