Using Logger in Swift projects

In order to use OCLogger in Swift projects, you can configure your Swift application by following the steps described in this section.

1. Create a native MobileFirst application for iOS that uses Swift. For more information, see Developing native applications for iOS in Xcode.
2. In the Xcode IDE, create a Swift file and name it OCLoggerSwiftExtension.swift.
   Figure 1. New Xcode File

   
   Figure 2. Swift File Type

   
   Figure 3. Name a Swift File

   
3. Add the following code to the file:

   import Foundation
   
   extension OCLogger {
     //Log methods with no metadata
   
     func logTraceWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_TRACE, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     func logDebugWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_DEBUG, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     func logInfoWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_INFO, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     func logWarnWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_WARN, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     func logErrorWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_ERROR, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     func logFatalWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_FATAL, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     func logAnalyticsWithMessages(message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_ANALYTICS, message: message, args:getVaList(args), userInfo:Dictionary<String, String>())
     }
   
     //Log methods with metadata
   
     func logTraceWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_TRACE, message: message, args:getVaList(args), userInfo:userInfo)
     }
   
     func logDebugWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_DEBUG, message: message, args:getVaList(args), userInfo:userInfo)
     }
   
     func logInfoWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_INFO, message: message, args:getVaList(args), userInfo:userInfo)
     }
   
     func logWarnWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_WARN, message: message, args:getVaList(args), userInfo:userInfo)
     }
   
     func logErrorWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_ERROR, message: message, args:getVaList(args), userInfo:userInfo)
     }
   
     func logFatalWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_FATAL, message: message, args:getVaList(args), userInfo:userInfo)
     }
   
     func logAnalyticsWithUserInfo(userInfo:Dictionary<String, String>, message:String, _ args: CVarArgType...) {
       logWithLevel(OCLogger_ANALYTICS, message: message, args:getVaList(args), userInfo:userInfo)
     }
   }

4. Test that the Swift extension is working by using the Logger in Swift with the following code:

   OCLogger.setLevel(OCLogger_TRACE)
   OCLogger.setCapture(true);
   
   let logger : OCLogger = OCLogger.getInstanceWithPackage("MyTestLoggerPackage")
   
   logger.logTraceWithMessages("Hello %@", "Trace");
   logger.logTraceWithMessages("Hello Trace");
   
   OCLoggerDebug("Hello Debug!");
   OCLoggerDebug("Hello %@", package: "SomePackageName", args: "Debug!");

SwiftHelloWorld[7591:4265124] [TRACE] [MyTestLoggerPackage] Hello Trace
SwiftHelloWorld[7591:4265124] [TRACE] [MyTestLoggerPackage] Hello Trace
SwiftHelloWorld[7591:4265124] [DEBUG] [IMF] viewDidLoad() in ViewController.swift:26 :: Hello Debug!
SwiftHelloWorld[7591:4265124] [DEBUG] [SomePackageName] viewDidLoad() in ViewController.swift:27 :: Hello Debug!