How to Update Text of Labels in Collection View in Swift

Discover how to easily `update label text` in a UICollectionView when editing finishes outside the collection view in Swift.
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This video is based on the question https://stackoverflow.com/q/64645339/ asked by the user 'Vladislav Yarmak' ( https://stackoverflow.com/u/11086745/ ) and on the answer https://stackoverflow.com/a/64645562/ provided by the user 'Shivam Parmar' ( https://stackoverflow.com/u/12451658/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Introduction

Do you want to change the text of labels in a collection view when a user modifies a text field and finishes editing? This common scenario in iOS development can enhance user experience by allowing real-time updates to your user interface. In this guide, we’ll explore how to implement this feature using Swift and a UICollectionView.

The Problem

Imagine you have a collection view displaying various labels and a text field where users can enter new text. After users finish editing the text field, you'd want all the labels in the collection view to reflect these changes. If you've tried to make this work but found it challenging, you’re not alone.

In this guide, we will go through the steps needed to achieve this and ensure that your UICollectionView updates dynamically when the text field's editing is done.

The Solution

Key Steps to Update Collection View Labels

To update the label text in your collection view, follow these essential steps:

Add New Values to Your Data Source: Update the array that holds the text for your labels based on the input from the text field.

Reload the Collection View: After updating the text array, call the reloadData() method on your collection view to refresh it and display the updated data.

Updating the Data Source

Let’s modify your existing code to include a function that updates the label text:

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

In this function:

We're directly modifying the text2 array, which contains the text displayed in the labels.

We then call the reloadData() function on the collection view. This tells the collection view to refresh its content and show the new texts.

Triggering the Update

To connect this functionality with your text field and a "Save" button, you’ll need to implement the save() method where the reload function will be called.

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

Make sure to link this “Save” action to a button in your storyboard so that it triggers the reload when clicked.

Final Implementation Example

Here's how your updated ViewController class could look:

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

Conclusion

By following these simple steps, you can seamlessly update the labels in your UICollectionView whenever a user edits the text field and presses the save button. This makes your application more interactive and user-friendly.

Feel free to experiment with the strings you update in the text2 array as needed. With just a few lines of code, you've added a dynamic element to your UICollectionView that enhances user engagement.

If you have any further questions or want to share your implementation, feel free to leave a comment below!