I wanted to add a background task for iOS13, to replace a setMinimumBackgroundFetchInterval for earlier iOS versions since Fire kindly pointed out it was obsolete :wink: So, I added the BackgroundTasks reference and started with the BGTaskScheduler.shared.register as per BGTaskScheduler | Apple Dev…

In vNext, including todays build, you can add <Reference Include="BackgroundTasks"> <Weak>True</Weak> </Reference> to force weak-linking. I’ll see if we can automatically detect this, longer term.

[image] jeremy: So, I added the BackgroundTasks reference and started with the BGTaskScheduler.shared.register as per BGTaskScheduler | Apple Developer Documentation but Fire says there is no such static member (.shared) and certainly there’s no code completion so am I missing something or is it…

[image] mh: Hmm, curious. that framework should be weekly linked. @ck , do you remember ow that worked? iirc that should be automatic, no? ( update : yeah our docs agree that this should happen automatically: Deployment Targets ) Yes it should. Any chance of a testcase that shows this? (I’m not…

[image] mh: if you scroll down further, it shows the actual ObjC names, what you want is probably Ah, I see (and I notice a lot Apple seem to ignore ObjC a lot in their docs). That is right, and I see the issue with CC. If I type if available("iOS 13.0") then begin BGTaskScheduler. Not…

[image] ck: Yes it should. Any chance of a testcase that shows this? (I’m not very familiar with this stuff) Here you go. Just try it on a 12.2 simulator, and it doesn’t run. Note I didn’t add any code (apart from the info.plist stuff that’s needed), all I did was add the backgroundtasks refe…

Just to make sure it isn’t a simulator thing, I just found an iPad with 12.4 on and it fails on that as well.

[image] jeremy: If I type if available("iOS 13.0") then begin BGTaskScheduler. Nothing comes up, but if I remove the first line then CC does indeed work, and sure enough there is the sharedScheduler.registerForTaskWithIdentifier that I was looking for. Curious,. you happen to have a qui…

[image] mh: Curious,. you happen to have a quick test case for that handy that reproduces this? (else I can try create one myself) Just use the one above, then paste that into AppDelegate (didFinishLaunchingWithOptions)

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iOS Background tasks compile issue

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