ios - 后台定时任务iOS

Question

我正在开发一个应用程序，我想在其中每小时进行一次网络调用(同步目的)。即使应用程序处于终止状态。我怎样才能做到这一点？

不涉及任何地方的 UI 更新，我只需要更新本地数据库和云存储文件。

Answer 1

developer apple BackgroundExecution

-(void)applicationDidEnterBackground:(UIApplication *)application
{
    bgTask = [application beginBackgroundTaskWithName:@"MyTask" expirationHandler:^{
        // Clean up any unfinished task business by marking where you
        // stopped or ending the task outright.
        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    }];

    // Start the long-running task and return immediately.
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        // Do the work associated with the task, preferably in chunks.

        [application endBackgroundTask:bgTask];
        bgTask = UIBackgroundTaskInvalid;
    });
}