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Скачать или смотреть How to Store TMDB API Data in Swift Without Errors

  • vlogize
  • 2025-05-28
  • 2
How to Store TMDB API Data in Swift Without Errors
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Описание к видео How to Store TMDB API Data in Swift Without Errors

Learn how to solve the common issue of storing TMDB API data in Swift by utilizing proper techniques in struct properties and decoding.
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This video is based on the question https://stackoverflow.com/q/66914178/ asked by the user 'dean miller' ( https://stackoverflow.com/u/15515866/ ) and on the answer https://stackoverflow.com/a/66915720/ provided by the user 'Joakim Danielson' ( https://stackoverflow.com/u/9223839/ ) 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: Store TMDB API data

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.
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How to Store TMDB API Data in Swift Without Errors

When building an app that relies on external APIs, like the TMDB (The Movie Database) API, developers often run into various coding challenges. One common problem is efficiently storing and decoding API data into structured formats. If you’ve encountered the error message "No exact matches in call to subscript," you’re not alone! In this guide, we’ll explore how to properly store TMDB data in a Swift struct and avoid common pitfalls while doing so.

Understanding the TMDB API Data Structure

Before diving into the solution, let’s take a look at how the data you receive from the TMDB API is structured. Typically, you might have a response that looks something like this:

A root object that contains several properties

An array of objects representing individual movies

The existing Swift structs provided in the question accurately represent the expected structure of the TMDB data.

MovieList & Result Structs

Here’s a quick look at the given structure:

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

Problem Diagnosis

You were encountering an error because you were trying to access struct properties using dictionary-style subscriptions (e.g., tmdbData["result"]), which is incorrect for structs. Instead, properties should be accessed using dot notation.

Example of Incorrect Access

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

Correct Access Pattern

The correct approach is to utilize dot notation to extract properties from your struct, just as shown in the examples below.

Implementing the Solution

To properly extract the results property from the tmdbData, you have a couple of options. Since results are stored within an array of MovieList, you can effectively use high-order functions to streamline your data collection.

Using map and compactMap

Using map: You can initially use the map() function to extract results from each MovieList instance in your array.

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

Using compactMap: Since the results array is optional, it's a good idea to filter out any potential nil values. You can do this efficiently with compactMap().

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

Revising the Structs

One additional recommendation is to reconsider your use of optional properties within your structs. While making all properties optional simplifies some aspects, it can also obscure decoding issues and complicate access to the data. Use optionals judiciously to improve your code’s reliability and maintainability.

Conclusion

By introducing proper struct property access and leveraging high-order functions like map and compactMap, you can successfully decode and store TMDB API data in your Swift application without encountering common errors. The key takeaway here is to properly utilize dot notation and be mindful of optionals in your models.

Happy coding! Remember, getting comfortable with Swift's data handling will significantly improve your app's functionality. If you have any questions or experiences to share regarding API integration, feel free to comment below!

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