下面内容自己看,官网上弄出来的。
Apple LLVM Compiler
Resolved Issues
Fixed an issue where valid C++ code involving a nested struct, enum, or lambda would fail to compile in C++1z mode. (31385254)
Build System
Resolved Issues
Xcode no longer produces an Update Signing report for targets that use manual signing. (31276851)
Debugging
Resolved Issues
Fixed an issue preventing output without newlines from being printed in the Xcode Debug Console until there is more output. This issue prevented interactive programs from working with the Xcode Debug console, causing prompts to appear only after a user entered text with a newline. (31465525)
Interface Builder
Resolved Issues
Interface Builder documents for iOS that contain a color based on an image pattern no longer result in a compiler error. Image pattern colors are not supported, and are now always converted to black when compiled. (31342191)
Fixed an issue that caused text to be hidden in Interface Builder documents that use a System size font. (31503323)
Playgrounds
Resolved Issues
Fixed an issue preventing user interaction events being sent from inside the live view of an iOS playground that is running on a device with a non-Retina display, or on a device with a connected non-Retina display. (31445684)
Signing
Resolved Issues
Resolves an issue where variables in entitlements files were always expanded using the Debug build configuration instead of the active build configuration. (31456053)
Swift Compiler
Resolved Issues
Xcode now schedules Swift whole-module optimization jobs in parallel, enabling better utilization of multiple cores for building projects. (31478013)
Swift Migrator
Resolved Issues
Fixed an issue where the Swift 3 Migrator would not apply compiler fix-it items. (30984612)
等待更新完成尝试重启,重启之后看看还在更新吗卸载Xcode,重新安装一下装两个或两个版本的Xcode,更新的话,也只会有一个在更新,依然不会影响你的使用