Скачать или смотреть Solving NSLocalizedString Issues with Variable Formatting in Swift

Discover how to resolve `NSLocalizedString` formatting errors in Swift when working with countdown variables. Learn the correct format specifiers for different data types.
---
This video is based on the question https://stackoverflow.com/q/62728075/ asked by the user 'karlcess' ( https://stackoverflow.com/u/13462541/ ) and on the answer https://stackoverflow.com/a/62728560/ provided by the user 'vadian' ( https://stackoverflow.com/u/5044042/ ) 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: NSLocalizedString with variables in Swift doesn't work

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.
---
Solving NSLocalizedString Issues with Variable Formatting in Swift

When developing iOS applications, you may encounter issues with localizing strings that include dynamic variables. A common problem arises when using NSLocalizedString with variables, particularly when you are expecting it to format numbers correctly in Swift. Let’s dive into a specific issue and provide a solution to help you avoid runtime errors while localizing your strings.

The Problem

In Swift, when you want to display a countdown that updates dynamically, you might use a variable such as secondiRimanenti, which represents the number of seconds remaining. Here is the snippet of code that might cause confusion:

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

What’s Going Wrong?

Despite the code working as expected in some instances, you may encounter the following error message:

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

This typically indicates an issue related to memory access, which is often caused by improper use of format specifiers when working with localized strings.

Understanding Format Specifiers

In the lines you've tried:

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

or

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

The Issue

The %@ format specifier is intended for object types, like strings or arrays.

Since secondiRimanenti is most likely an Int, you need to use a format specifier suitable for integers.

The Solution

To fix the issue, replace %@ with the correct format specifier for integers. You should use %ld or %d depending on your integer type. Here’s how you can correctly format your localized string:

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

Summary of the Fix:

Use %ld for Int types when creating localized strings.

Avoid using %@ for integers as it will lead to memory access errors, such as EXC_BAD_ACCESS.

Conclusion

Correctly formatting localized strings in Swift is crucial for avoiding errors and ensuring that your app performs as expected. Whenever you are working with localization and dynamic variables, always double-check the format specifiers you are using. By making this small adjustment, you can easily display countdowns without running into issues.

Happy coding!