![\"Cover\"](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-blog@2x.png\"\/)
<\/p>\nPlease welcome our special, performance-focused update \u2013 AppCode 2019.3!<\/p>\n
<\/p>\n
<\/i>Download AppCode 2019.3<\/a><\/p>\n <\/p>\n We promised to dedicate this release to performance improvements, and here they are:<\/p>\n Some major improvements started during this release are still in progress and scheduled for the next release. We\u2019re staying on course and our main focus areas for 2020.1 are, again, performance boosts and language support. <\/p>\n AppCode 2019.3 brings support for the following Swift 5.1 features:<\/p>\n A whole heap of new Swift intentions are here to boost your productivity:<\/p>\n We\u2019ve added two new options to help you generate Swift code: New useful code formatting options are here:<\/p>\n Are you working with the Swift Tensorflow<\/a> toolchain or another custom Swift toolchain? Now we correctly load all the code constructs for custom Swift toolchains and use them for building, running, debugging, and testing. <\/p>\n We\u2019ve fixed dozens of UX issues by reworking the Messages<\/strong> tree, which now shows the same information as Xcode does:<\/p>\n The build progress bar now shows accurately how long it\u2019s going to take to compile your application: <\/p>\n The message filter is simplified and now offers the same options as Xcode does: All Issues<\/em>, Errors and Warnings<\/em>, and Errors Only<\/em>.<\/p>\n Code assistance, build, run, and debugging now work for Mac Catalyst projects.<\/p>\n That\u2019s it! Explore all the new features in detail on our website<\/a> and start your free 30-day evaluation to try them in action!<\/p>\nSwift<\/h2>\n
Performance<\/h3>\n
\n
Language Support<\/h3>\n
\n
New Intentions<\/h3>\n
\n
![\"Split](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-split_decl_assignment@2x.png\"\/)
<\/li>\n![\"Split](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-split_multiple.png\"\/)
<\/li>\nif<\/code>\/else<\/code> statements:![\"Split](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-merge_if@2x.png\"\/)
<\/li>\n![\"Flip](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-flip@2x.png\"\/)
<\/li>\nif<\/code> condition:
\n![\"Invert](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-invert@2x.png\"\/)
<\/li>\n
\n![\"Split](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-merge_conditions@2x.png\"\/)
<\/li>\n
\n![\"De](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-demorgan@2x.png\"\/)
<\/li>\n<\/ul>\nCode Generation<\/h3>\n
Prefer Void over ()<\/code> and Prefer explicit return<\/code>. Find them in Editor | Code Style | Swift | Code Generation | General<\/code>.<\/p>\nCode Formatting<\/h3>\n
\n
willSet<\/code>\/didSet<\/code> on one line (Preferences | Editor | Code Style | Swift | Wrapping and Braces | Keep when reformatting | Methods and functions in one line<\/code>).<\/li>\nPreferences | Editor | Code Style | Swift | Wrapping and Braces | Keep when reformatting | Empty type declarations in one line<\/code>).<\/li>\n<\/ul>\nAlternative Swift Toolchains<\/h3>\n
Build Messages<\/h2>\n
![\"Build](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-build_messages@2x.png\"\/)
<\/p>\n![\"Build](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-build_messages_progress@2x.png\"\/)
<\/p>\n![\"Build](\"https:\/\/blog.jetbrains.com\/wp-content\/uploads\/2019\/11\/objc-build_messages_filter@2x.png\"\/)
<\/p>\nMac Catalyst Support<\/h2>\n