What's new in XCode. Tips and tricks.

Build

Parallelize build 

Compilation mode «Incremental»

defaults write com.apple.dt.Xcode ShowBuildOperationDuration -bool YES | NO

Product -> Perform action -> Build with timing summary

Tests

• maximum-concurrent-test-simulator-destinations NUMBER : the maximum number of simulator destinations to test on concurrently
• parallel-testing-enabled YES|NO : overrides the per-target setting in the scheme
• parallel-testing-worker-count NUMBER : the exact number of test runners that will be spawned during parallel testing
• maximum-parallel-testing-workers NUMBER : the maximum number of test runners that will be spawned during parallel testing

Shortcuts

• Cmd+Shift+O - open quickly
• Cmd+Shift+J - reveal in project navigator
• Ctrl+0 - select target
• Ctrl+Shift+0 - select device
• Cmd+B - build
• Cmd+R - run
• Cmd+. - stop
• Ctrl+T - open new tab

Actions

Cmd+Click at code for open actions

For classes:

• fold
• create method
• edit in scope
• rename
• etc.

For methods:

• add parameter
• add return type
• callers
• etc.

Source control

Source control states

Multi cursor editing

Ctrl+Shilf+Click

Option+Drag mouse

Code snippets

For create code snippet you select code that you want, click on it with right button and select 'Create Code Snippet'.

<# placeholder text #> - for template code

You can chose:

• platform (iOS, macOS)
• language (Swift, Obj-C)
• completion scope (function, top level)
• completion shortcut

File templates

mkdir -p ~/Library/Developer/Xcode/Templates/File\ Templates/Mine

cp -R /Applications/Xcode.app/Contents/Developer/Library/Xcode/Templates/File\ Templates/Source/Swift\ File.xctemplate/ ~/Library/Developer/Xcode/Templates/File\ Templates/Mine/Protocol\ with\ Extension.xctemplate

Breakpoints

Breakpoint actions:

• activate / disable
• condition
• ignoring n times before stop
• log message (@exp@ - expression, %B - breakpoint name, %H - hit count )
• debugger command like 'po'
• play sound
• automatically continue

References

• WWDC video - WWDC video about new in XCode 10.
• Buildtime - Display build time.
• XCode features - State about new in XCode 10.
• Source control symbols - Source control file symbols.
• Text macroses - Template file macroses.
• File template - Creating custom file template.