IOS SDK 4.0.0 Release

Version 4.0.0 is a major update to the Castle iOS SDK. This release includes several improvements detailed below. Please review the breaking changes below before upgrading.

What's new

• Expanded device signals: Additional device signals collected for broader detection coverage.
• SDK protection: Added obfuscation to protect SDK internals from reverse engineering.
• Swift-native: Legacy Objective C parts of the SDK have been rewritten in Swift for improved stability and performance.
• Async configuration: New async variant of configure (configureAsync) that can be safely called from any thread or Swift Task.

Breaking changes

• import Castle has changed to import CastleSDK
• Castle.configure() now throws instead of asserting on invalid configuration
• New Castle.configureAsync() for async configuration call
• createRequestToken() returns nil instead of an empty string when the SDK is not initialized
• Minimum supported iOS version is now iOS 13

Resources

• GitHub Release
• iOS SDK v4 Migration Guide
• The release package includes Jazzy-generated API documentation with detailed technical reference for all public APIs.