SwiftUI iOS Debug & HotReloading in VSCode

Demonstrating vscode development environment using xcodegen + HotReloading.

• Language Server Protocol for Swift with vscode-swift extension.
• Lint Swift with SwiftLint extension.
• Xcode project generating using XcodeGen
• Launch & debugging with lldb iOS Debug
• HotReloading & Injection with HotReloading
• SwiftUI injection property wrapper with Inject

Support HotReloading

One caveat to support HotReloading is to ensure the derivedDataPath passed to xcodebuild matches that when building with Xcode.

Xcode (by default) uses "Unique" build locations for each project: Xcode DerivedData Hashes

Once the xcodegen task has been run the following command can be used to output the $BUILT_PRODUCTS_DIR including the unique location (for this demo):

$xcodebuild -project ./Demo.xcodeproj -scheme Demo -showBuildSettings | grep -m 1 "BUILT_PRODUCTS_DIR" | grep -oEi "\/.*"

Output:

~/Library/Developer/Xcode/DerivedData/Demo-avuzscipzqxczrbltxhlvbnxujdo/Build/Products/Debug-iphoneos

This in turn means the .vscode/launch.json iOS Debug program needs to be updated to resolve to the output *.app ($CODESIGNING_FOLDER_PATH)