[swift-users] How to optionally link swift framework into another framework

[Rien]

You need conditional compilation.

Called “Active Compilation Conditions” in the build settings.

For example define a ACC of “USE_LOGGING”

Then in your code:

#if USE_LOGGING

import Logging

#else

struct Logging {
	func debug(message: string) {}
}

#endif




Regards,
Rien

Site: http://balancingrock.nl
Blog: http://swiftrien.blogspot.com
Github: http://github.com/Balancingrock
Project: http://swiftfire.nl





> On 06 Mar 2017, at 17:26, Jakub Bednář via swift-users <swift-users at swift.org> wrote:
> 
> Hello everyone,
> 
> I am trying to add optional logging into my framework, but for sake of this question, lets assume I want to add optional logging into an app. I have created an example with following setup:
> 
> 1. Logging.framework declares
> 
> 	public protocol Logging {
> 		func debug(message: String)
> 	}
> 
> 	and I have build the framework for the app to see it.
> 
> 2. Application has 
> 
> 	import Logging
> 	
> 	public class Engine {
> 
> 		let logger: Logging?
> 
> 		public init(withLogger logger: Logging? = nil) {
> 			self.logger = logger 
> 		}
> 
> 		public work() {
> 			self.logger?.debug(“Working”)
> 		}
> 	} 
> 
> Now I don’t have the Logging.framework in Embed Binaries nor Link Frameworks lists. My app builds ok, but then fails to start telling me that Logging.framework was not loaded. I checked the binary using otool -L and Logging.framework is still referenced by the binary. Is there any way how to achieve my goal? This would be trivial with Objective-C and I still can’t figure it out in Swift.
> 
> Thanks a lot,
> 
> J.
> 
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