Скачать или смотреть How to Make Image View Height and Width Dynamic in Swift 4 or 5

Learn how to dynamically adjust the image view's height and width in Swift, ensuring images maintain their original aspect ratio while using AutoLayout.
---
This video is based on the question https://stackoverflow.com/q/70120323/ asked by the user 'Akash Neeli' ( https://stackoverflow.com/u/12831866/ ) and on the answer https://stackoverflow.com/a/70120623/ provided by the user 'SEUNGHWAN LEE' ( https://stackoverflow.com/u/17304430/ ) 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 to make image View Height and width (Aspect Ratio) dynamic according to the image size in swift 4 or 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 Make Image View Height and Width Dynamic in Swift 4 or 5

When developing an iOS application, one common challenge developers face is how to effectively display images of varying sizes within a user interface. If you're using a UICollectionView to present images, you may have found that statically setting the height and width of the image view can lead to issues displaying the images correctly.

In this guide, we’ll explore how to allow your image view to display images in their original size by creating a dynamic height and width based on the aspect ratio of the images.

The Problem

You've set up a UICollectionView for your app and are populating it with images retrieved from your backend. However, you encounter a problem: the images are not displayed correctly. You had previously set the image view's height to a fixed value of 180, and the width to the screen width, which works fine for some images but not all.

To solve this problem, we need to make our image view capable of adjusting its height and width based on the actual dimensions of the images retrieved.

The Solution

To achieve a dynamically sized image view, follow these steps:

1. Remove Fixed Constraints

Start by removing any fixed height and width constraints that you set on your image view. This allows the image view to resize based on the image’s properties.

2. Set Constraints to Edges

Next, ensure your image view has constraints set to the leading, trailing, top, and bottom of its container to 0. This allows the image to fill the available space according to its size.

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

3. Retrieve Image Size

You can retrieve the actual size of your images using the following code snippet:

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

4. Adjust Cell Size Dynamically

You will need to adjust the size of your cells based on the size of the image. Implement the following method in your UICollectionViewDelegate:

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

Conclusion

By following the steps outlined in this post, your image view will now resize according to the original dimensions of the images, maintaining their aspect ratio. This results in a much more visually appealing user interface and enhances the overall user experience of your iOS application.

If you have further questions on this topic or run into issues implementing these strategies, feel free to leave a comment below!