Xcode 12.5 promises to be very good!- Swift 5.4. Neat architectural improvements that should result in improved code completion and faster incremental builds
- A Playground in an app’s project can now access symbols from the app target.
- Simulator can create animated GIFs from video recordings using the new Record Video feature.
- Implicit member expressions now support chains of member accesses.
`
let milky: UIColor = .white.withAlphaComponent(0.5)
`
- Property wrappers are now supported on local variables.
- Functions, subscripts, and initializers may now have more than one variadic parameter, as long as all parameters that follow variadic parameters are labeled.
- StoreKit Testing in Xcode now supports testing of non-renewing subscriptions.
- Xcode now supports XCTest unit and UI tests for watchOS apps.
https://developer.apple.com/documentation/xcode-release-notes/xcode-12_5-beta-release-notes/#Xcode