> On Jul 1, 2015, at 16:51 , Stephen J. Butler <[email protected]> wrote: > > You're focusing on the wrong part :) Which element of your code has a type of > "NSGraphicsContext"? It's cocoaCTX! The compiler error is suggesting you do > one of these: > > cocoaCTX?.graphicsPort > cocoaCTX!.graphicsPort
Yeah, I finally figured that out <chagrin>. I keep doing that! > > > On Wed, Jul 1, 2015 at 6:28 PM, Rick Mann <[email protected]> wrote: > I'm trying to do this: > > class > Context > { > init() > throws > { > let cocoaCTX = NSGraphicsContext.currentContext() > guard let sysCTX = cocoaCTX.graphicsPort as! CGContextRef else { > throw Errors.InvalidContext } > CGContext = sysCTX; > } > > var CGContext : CGContextRef > } > > > But I'm getting > > error: value of optional type 'NSGraphicsContext?' not unwrapped; did you > mean to use '!' or '?'? > guard let sysCTX = cocoaCTX.graphicsPort as! CGContextRef > else { throw Errors.InvalidContext } > ^ > ! > In the typical if-let, you don't add the ?. If I do add the ?, I get: > > error: '_??' is not convertible to '_??' > guard let sysCTX = cocoaCTX.graphicsPort? as! CGContextRef > else { throw Errors.InvalidContext } > ~~~~~~~~~~~~~~~~~~~~~^ > > Errors is an enum I created in a different file. > > I always seem to trip up on the conditional optional unwrapping. Not sure > what I'm doing wrong here. Help is much appreciated. Thanks! > > -- > Rick Mann > [email protected] > > > > _______________________________________________ > > Cocoa-dev mailing list ([email protected]) > > Please do not post admin requests or moderator comments to the list. > Contact the moderators at cocoa-dev-admins(at)lists.apple.com > > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/cocoa-dev/stephen.butler%40gmail.com > > This email sent to [email protected] > -- Rick Mann [email protected] _______________________________________________ Cocoa-dev mailing list ([email protected]) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to [email protected]
