Best IDEs and Tools for Swift Development: Advanced Level

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Introduction: The Swift Ecosystem for Professionals

Swift is not just a language for iOS/macOS development, but a powerful ecosystem that requires a developer not only to know the syntax but also to be able to choose the right tools. At an advanced level, standard Xcode may not be enough: you need fast linters, advanced profilers, alternative editors, and continuous integration systems. In this article, we will review the best IDEs and tools for a Swift developer who wants to go beyond basic functionality.

1. Revolution in IDEs: Xcode, AppCode, and VSCode

Xcode 15: Configuration for the Advanced User

Xcode remains the primary IDE for Swift, but at an advanced level it needs to be customized.

Build Settings: Use SWIFT_COMPILER_MODE = wholemodule to speed up Release builds.
Behaviors: Configure automatic test execution on build errors.
Code Snippets: Create snippets for MVVM patterns and Combine.

Example of an advanced Run Script for optimization:

if [ "${CONFIGURATION}" = "Release" ]; then  echo "Removing debug symbols..."  strip -S "${DWARF_DSYM_FOLDER_PATH}/${DWARF_DSYM_FILE_NAME}"fi

AppCode: When Xcode is Slow

JetBrains AppCode is an alternative to Xcode with the IntelliJ engine. It offers:

Higher-order refactoring: Extract protocols, replace inheritance with delegation.
Code inspections: Find memory leaks and unused code.
Navigation: Quick jump to protocol implementation (Cmd+Alt+B).

However, AppCode does not support SwiftUI Preview and Storyboard, so it is used in a hybrid way: code is written in AppCode, and UI is designed in Xcode.

Visual Studio Code + Swift Extension

For those who want a lightweight editor with a powerful plugin ecosystem. Install the Swift for Visual Studio Code extension (from Swift.org).

Configure settings.json for advanced autocompletion:

{  "swift.sourcekit-lsp.serverPath": "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/sourcekit-lsp",  "swift.buildArguments": ["-Xswiftc", "-Xfrontend", "-Xswiftc", "-warn-long-function-bodies=100"]}

Drawback: No built-in debugger for SwiftUI Preview.

2. Static Analysis and Linting Tools

SwiftLint: Custom Rules for Your Team

SwiftLint is a mandatory tool for CI. Create a .swiftlint.yml with advanced rules:

disabled_rules:  - trailing_whitespaceopt_in_rules:  - empty_count  - force_unwrapping  - closure_spacingtype_body_length:  warning: 200  error: 350reporter: "xcode" # for Xcode

Run it in the build scheme as a script:

if which swiftlint >/dev/null; then  swiftlint --strictelse  echo "warning: SwiftLint is not installed"fi

Periphery: Finding Dead Code

Periphery analyzes the call graph and finds unused methods, classes, and protocols. Example run:

periphery scan --workspace MyApp.xcworkspace --schemes MyApp --targets MyApp --index-store-path ~/Library/Developer/Xcode/DerivedData/MyApp-abc/Index/DataStore

This tool is especially useful when refactoring large legacy projects.