20190726 Background App Refresh Taskがやってきた

Transcript

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13. λεΫͷొ࿥
    BGTaskScheduler.shared.register(forTaskWithIdentifier: "XXX",
    using: nil) { task in
    self.handleAppRefresh(task: task as! BGAppRefreshTask)
    }
    

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14. λεΫͷ౤ೖ
    func applicationDidEnterBackground(_ application: UIApplication) {
    scheduleAppRefresh()
    }
    func scheduleAppRefresh() {
    let request = BGAppRefreshTaskRequest(identifier: "XXX")
    request.earliestBeginDate = Date(timeIntervalSinceNow: 15 * 60)
    do {
    try BGTaskScheduler.shared.submit(request)
    } catch {
    print("Could not schedule app refresh: \(error)")
    }
    }
    

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15. λεΫͷ࣮ߦ
    func handleAppRefresh(task: BGAppRefreshTask) {
    // ඞཁ͕͋Ε͹࠶౤ೖ
    scheduleAppRefresh()
    task.expirationHandler = {
    // ࣮ߦظݶ͕੾Εͨͱ͖ͷΩϟϯηϧॲཧ
    }
    // do something
    // λεΫ׬ྃ
    task.setTaskCompleted(success: true)
    }
    

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