Debugging in Swift

Better Printing

While debugging, it can be easy to get overloaded with irrelevant and poorly formatted logs in the console. Here are some strategies that can help.

Custom Type Summaries

From: (25:07) WWDC24: Run, Break, Inspect: Explore effective debugging in LLDB | Apple - YouTube

Annotate your types with the @DebugDescription macro (after Swift 6).¹

@DebugDescription
 
struct WatchLaterItem {
	let video: Video
	let name: String
 
	let addedOn: Date
	var debugDescription: String {
		"\ (name) - \(addedOn)"
	}
}

See also

• Debugging in Xcode
• Debugging in Swift
• LLDB

Footnotes

Footnotes

1. This strategy makes it so you no longer need to use the LLDB command po and can instead use p consistently everywhere. ↩