How To Check Your Swift Code

How To Articles

Have you ever needed to check your Swift code and make sure it’s error-free? As a developer myself, I understand the importance of ensuring the quality of your code. In this article, I will guide you through the process of checking your Swift code and provide my personal insights and commentary along the way.

1. Use a Linter

One of the best ways to check your Swift code is by using a linter. A linter is a tool that analyzes your code for potential errors, style violations, and other issues. One popular linter for Swift is SwiftLint.

Installing SwiftLint is straightforward. You can use a package manager like CocoaPods or Homebrew, or you can download the executable from the GitHub repository. Once installed, you can run SwiftLint using the command line, specifying the path to your Swift code.

Here’s an example:

$ swiftlint lint path/to/your/code.swift

SwiftLint will analyze your code and provide a detailed report with any violations found. It will also suggest fixes for some of the issues. It’s a great tool to ensure that your code follows the Swift community’s best practices.

2. Use Xcode’s Built-in Code Analyzer

If you’re using Xcode as your development environment, you have access to a powerful built-in code analyzer. The code analyzer automatically checks your code for potential issues and displays warnings and errors directly in the Xcode editor.

To use the code analyzer, simply build your project in Xcode. Any issues will be highlighted with markers in the code editor, and you can click on them to view more details and suggested fixes.

The code analyzer checks for a wide range of issues, including memory leaks, unused variables, and potential crashes. It’s a valuable tool to help you catch errors early in the development process.

3. Manual Code Review

In addition to using automated tools like linters and code analyzers, conducting a manual code review is always a good practice. Going through your code line by line can help you spot potential issues that automated tools might miss.

When reviewing your code, pay attention to readability, maintainability, and adherence to best practices. Look for any code that could be simplified or optimized. Consider the overall structure and organization of your code. Are there any areas that could be refactored or improved?

Don’t forget to test your code thoroughly, especially the edge cases. Make sure to include unit tests and run them to verify that your code behaves as expected in different scenarios.


Checking your Swift code is an essential step in ensuring its quality and reliability. In this article, we explored three different approaches to checking your code: using a linter like SwiftLint, leveraging Xcode’s built-in code analyzer, and conducting a manual code review.

By utilizing these techniques, you can catch potential issues early in the development process and ensure that your code follows best practices. Remember, code quality is crucial for a successful and maintainable project.