Скачать или смотреть How to Update TableView Items at Specific Positions in Swift

A detailed guide on how to effectively update specific items in a TableView in Swift, including practical examples and solutions.
---
This video is based on the question https://stackoverflow.com/q/62928187/ asked by the user 'Andrew' ( https://stackoverflow.com/u/9363441/ ) and on the answer https://stackoverflow.com/a/62928283/ provided by the user 'Shehata Gamal' ( https://stackoverflow.com/u/5820010/ ) 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 I can update item of tableview on certain position swift?

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.
---
Updating TableView Items at Specific Positions in Swift

When developing an iOS application using Swift, you might encounter scenarios where you need to update specific items displayed in a UITableView. This could be especially true in cases where a user navigates away to a detail view and then returns to the main list. In this guide, we’ll explore how to effectively update item values at certain positions within a UITableView in Swift.

Understanding the Challenge

Imagine you have a list displayed in a UITableView, and based on user actions in a detail view, you need to change certain properties of the items in that list. A typical implementation involves the following steps:

The user taps on an item in the list, which triggers navigation to a detail view.

Upon returning to the list, you may want to update the item's properties based on interactions in the detail view.

However, the issue arises when you try to update a specific item and get lost in the details of indexing and cell updating. Let's break down the solution to this problem into manageable segments.

Step-by-Step Solution

1. Storing the Selected Index Path

First, ensure that you remember the position of the item that the user selected before navigating to the detail view. To do this, declare a variable to hold the selected index path.

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

2. Protocol for Communications

You would typically use a protocol to communicate back from the detail view to the main list. In your detail view, make sure you have a protocol like this:

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

3. Updating the Data Model in Detail View

In the detail view, when you're ready to return to the main list, you can call the delegate method to pass back any changes. You can modify the structure to send any relevant information, especially if you need to update properties based on user interactions.

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

4. Processing the Update in the Main List

In your main list's extension, implement the protocol method where you can handle the update. Instead of using a static index path, use the stored lastIndex to update the right cell.

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

Conclusion

By following these steps, you can effectively update specific items in your UITableView. Remember the core points: store the selected index path, utilize protocols for communication, and dynamically update the cell based on your interactions. This approach not only helps you manage your data effectively but also keeps your user interface responsive and intuitive.

Now you can confidently handle updates in your UITableView, providing a seamless experience for your users! Happy coding!