![]() on a property is ignored if the property is redeclared in a protocol that inherits from another protocol. This allows using blocks in new places like std::optional. The std::is_scalar trait is now true for Block types. (68252534)Ĭlang now warns about incorrect format strings that are specified in an NSLocalizedString macro. (64037686)įixed an issue in Xcode 12 build 12A7208 which could cause build failures for iOS or tvOS apps using StoreKit or Authentication Services with SwiftUI, when targeting simulated devices or using SwiftUI Previews. (56087948, 58010475)Ĭompilable code completions for SwiftUI APIs now correctly handle overloaded methods. Completions are also more accurate and up to 15 times faster in Xcode 12. ![]() (56423420)Ĭode completions have a new, focused user interface, making it easier to find a completion. The new Librar圜ontentProvider protocol gives you the ability to show your views and modifiers in Xcode’s library. For more seamless live previewing on device, Xcode installs the new Xcode Previews app for iOS 14 and iPadOS 14. Xcode now supports previewing widgets, App Clips, and content in Swift packages. The tab bar appears when you have more than one document open, or you choose View > Always Show Tab Bar. Option-click or double-click to open a document in a tab. General New Featuresĭocuments can now be opened in their own tab, making it easy to quickly switch between files while maintaining the rest of Xcode’s configuration. Xcode 12 requires an Intel-based Mac running macOS Catalina 10.15.4 or later. The Xcode 12 release supports on-device debugging for iOS 9 and later, tvOS 9 and later, and watchOS 2 and later. Xcode 12 includes SDKs for iOS 14, iPadOS 14, tvOS 14, watchOS 7, and macOS Catalina 10.15.6. Update your apps to use new features, and test your apps against API changes.
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