凤凰求蛊
在iOS 8.1中可以。不过，您需要确保在应用程序委托的中重新创建观察者查询application:didFinishLaunchingWithOptions:。8.0中的错误完全阻止了HealthKit的后台通知。编辑：在您的AppDelegate中：- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { //create/get your HKHealthStore instance (called healthStore here) //get permission to read the data types you need. //define type, frequency, and predicate (called type, frequency, and predicate here, appropriately) UIBackgroundTaskIdentifier __block taskID = [application beginBackgroundTaskWithExpirationHandler:^{ if (taskID != UIBackgroundTaskInvalid) { [application endBackgroundTask:taskID]; taskID = UIBackgroundTaskInvalid; } }]; [healthStore enableBackgroundDeliveryForType:type frequency:frequency withCompletion:^(BOOL success, NSError *error) {}]; HKQuery *query = [[HKObserverQuery alloc] initWithSampleType:healthType predicate:predicate updateHandler: ^void(HKObserverQuery *query, HKObserverQueryCompletionHandler completionHandler, NSError *error) { //If we don't call the completion handler right away, Apple gets mad. They'll try sending us the same notification here 3 times on a back-off algorithm. The preferred method is we just call the completion handler. Makes me wonder why they even HAVE a completionHandler if we're expected to just call it right away... if (completionHandler) { completionHandler(); } //HANDLE DATA HERE if (taskID != UIBackgroundTaskInvalid) { [application endBackgroundTask:taskID]; taskID = UIBackgroundTaskInvalid; } }]; [healthStore executeQuery:query];}