Hello everyone!
I'm having a problem with background tasks running in the foreground.
When a user enters the app, a background task is triggered. I've written some code to check if the app is in the foreground and to prevent the task from running, but it doesn't always work. Sometimes the task runs in the background as expected, but other times it runs in the foreground, as I mentioned earlier.
Could it be that I'm doing something wrong? Any suggestions would be appreciated.
here is code:
class BackgroundTaskService {
@Environment(\.scenePhase) var scenePhase
static let shared = BackgroundTaskService()
private init() {}
// MARK: - create task
func createCheckTask() {
let identifier = TaskIdentifier.check
BGTaskScheduler.shared.getPendingTaskRequests { requests in
if requests.contains(where: { $0.identifier == identifier.rawValue }) {
return
}
self.createByInterval(identifier: identifier.rawValue, interval: identifier.interval)
}
}
private func createByInterval(identifier: String, interval: TimeInterval) {
let request = BGProcessingTaskRequest(identifier: identifier)
request.earliestBeginDate = Date(timeIntervalSinceNow: interval)
scheduleTask(request: request)
}
// MARK: submit task
private func scheduleTask(request: BGProcessingTaskRequest) {
do {
try BGTaskScheduler.shared.submit(request)
} catch {
// some actions with error
}
}
// MARK: background actions
func checkTask(task: BGProcessingTask) {
let today = Calendar.current.startOfDay(for: Date())
let lastExecutionDate = UserDefaults.standard.object(forKey: "lastCheckExecutionDate") as? Date ?? Date.distantPast
let notRunnedToday = !Calendar.current.isDate(today, inSameDayAs: lastExecutionDate)
guard notRunnedToday else {
task.setTaskCompleted(success: true)
createCheckTask()
return
}
if scenePhase == .background {
TaskActionStore.shared.getAction(for: task.identifier)?()
}
task.setTaskCompleted(success: true)
UserDefaults.standard.set(today, forKey: "lastCheckExecutionDate")
createCheckTask()
}
}
And in AppDelegate:
BGTaskScheduler.shared.register(forTaskWithIdentifier: "check", using: nil) { task in
guard let task = task as? BGProcessingTask else { return }
BackgroundTaskService.shared.checkNodeTask(task: task)
}
BackgroundTaskService.shared.createCheckTask()
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