ios - watchOS3 handle(_ backgroundTasks: Set<WKRefreshBackgroundTask>) on device be called -


i found method called on simulator, on real watch device, never called. both apple's simple code , test.

i want know mistakes or apple's.

my code -

class interfacecontroller: wkinterfacecontroller, wkextensiondelegate {       @iboutlet var textlbl: wkinterfacelabel!      override func awake(withcontext context: any?) {         super.awake(withcontext: context)          wkextension.shared().delegate = self          // configure interface objects here.     }      func handle(_ backgroundtasks: set<wkrefreshbackgroundtask>) {         task : wkrefreshbackgroundtask in backgroundtasks {             if task wksnapshotrefreshbackgroundtask {                 textlbl.settext("hahahah");                 task.settaskcompleted()             }         }     } }

i managed find workaround pointing scheduledcompletion attribute "real" function rather closure e.g.

wkextension.shared().schedulebackgroundrefresh(                   withpreferreddate: nextrefreshtime!,                    userinfo: nil,                    scheduledcompletion: self.backgroundrefreshrunning) ...  private func backgroundrefreshrunning(error: error?) {     if (error != nil) {         print("error running background task: \(error.debugdescription)")     } }

that seems work fine!

my guess there bug in swift 3 compiler. used use inline closure scheduledcompletion value, worked fine until updated code swift 2.3 swift 3


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