Swift-log is a logging framework for Swift that provides a simple API for logging. It includes features like log levels, custom metadata, and integrations with other logging frameworks like Willow. The summary demonstrates how to create a Logger, set its log level, and log messages. It also shows how to integrate with Willow by creating a WillowLogHandler that implements the LogHandler protocol.

1. swift-log
(@mike_neck)

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• twitter: @mike_neck
• GitHub: mike-neck
• L is B Java
• Swift
• Swift

3. direct

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•swift-log
•swift-log x Willow

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• / (struct)/ /
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9. Swift
•NSLog/print
•SwiftyBeaver/SwiftyBeaver
•Nike/Willow
•IBM-Swift/LoggerAPI +
HeliumLogger

10. NSLog/print
(NSLog)
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SwiftyBeaver ☓
Willow ☓
HeliumLogger
LoggingAPI
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11. swift-log

12. What’s swift-log
• swift-log apple API
• API
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• CocoaPods/Carthage support issue
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13. Logging API?
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• Logging API

14. Logging API?
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15. Logging API?
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Logging API
• Logging API
protocol
Adapter

16. swift-log
x
Willow

17. sift-log

18. demo 1
swift-log
swift-log

19. Logger
var logger = Logger(label: "com.example.MyApp")
logger.info("Now it works!")
logger.error("Error help me!")
logger.logLevel = .info
logger.info("Now it works!") //
logger.debug("This is debug!") //

20. demo 2
swift-log x Willow
swift-log

21. LogHandler
struct WillowLogHandler: LogHandler {
var metadata: Logger.Metadata
var logLevel: Logger.Level
subscript(metadataKey _: String) -> Logger.Metadata.Value?
func log( //
level: Logger.Level,
message: Logger.Message,
metadata: Logger.Metadata?,
file: String,
function: String,
line: UInt)
}

22. LoggingSystem
LoggingSystem.bootstrap { label in
WillowLogHandler()
} // LoggingSystem.bootstrap LoggerHandler
// WillowHandler LogHandler
var logger = Logger(label: "com.example.MyApp")
logger.info("Now it works!")
logger.error("Error help me!")

23. • swift-log Logging API
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LogHandler
• swift-log …
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