multitasking

So I want to support app switching in my upcoming iPhone app and I've implemented all the proper delegate methods in my application delegate. So when the user resumes the application, I can see their activity in the NSLog and all. However, how can I tell my app has resumed a controller? Is there a method I can put in my controller to tell me the app has resumed in said controller? Reason I ask is because my application handles its own URL schema, and I want to update the view depending on the URL launched. Any help will be greatly appreciated. Thanks in advance You can have you your controller

I have MPMoviePlayerController that should play video's audio in background and should be controlled by the multitasking play/pause controls. After updating .plist file with Required background modes and calling the following: - (void)startBackgroundStreaming { [[UIApplication sharedApplication] beginReceivingRemoteControlEvents]; [self becomeFirstResponder]; NSError *activationError = nil; AVAudioSession *audioSession = [AVAudioSession sharedInstance]; [audioSession setCategory:AVAudioSessionCategoryPlayback error:&activationError]; [audioSession setActive:YES error:&activationError]; } The

I read that Linux kernel is preemptive, which is different from most Unix kernels. So, what does it really mean for a kernal to be preemptive? Some analogies or examples would be better than pure theoretical explanation. ADD 1 -- 11:00 AM 12/7/2018 Preemptive is just one paradigm of multi-tasking. There are others like Cooperative Multi-tasking . A better understanding can be achieved by comparing them. Imagine the simple view of preemptive multi-tasking. We have two user tasks, both of which are running all the time without using any I/O or performing kernel calls. Those two tasks don't have

I'm trying to play sequence of audio files in the background using AVAudioPlayer. When the app is not in the background it plays well, but when the app goes to the background it won't play the second song. Here is my code: -(void)playAudio:(NSString *)path{ NSURL *url = [NSURL fileURLWithPath:path]; NSError *error; AVAudioPlayer *ap = [[AVAudioPlayer alloc] initWithContentsOfURL:url error:&error]; [[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil]; [[AVAudioSession sharedInstance] setActive: YES error: nil]; ap.delegate = self; mainController.audioPlayer =

I want to make an activity that can be opened above ANY app. Normally, even when the activity is set as dialog, when you switch to my app, you see my app, and in the background you see the launcher: BUT, I want the app will go above any app like this: (made in photoshop): I did see this question Creating a system overlay window (always on top) , but in ICS there is no functionallity to the layout. Furthermore, I want to give a dialog box from my app without minimizing the other app... there are plenty of apps that show a floating view on top of everything like : airbrowser , LilyPad , Stick it

I was just wondering if it was possible to make an iOS app that would track your location via GPS while it was in the background. I tried this with the built-in app "Maps", but to no avail. If this is possible, it would be great if you could refer me to some sample code, documentations, or tutorials! (if this is a duplicate, please let me know and I will remove it) This is possible — see this document for multitasking in general and this section of the Location Awareness Programming Guide for "Getting Location Events in the Background" . Of course, all these talk about all of the various ways

In multitasking systems, some abnormal conditions prevent progress of executing processes or threads. I'll refer to both processes and threads simply as "processes". Two of these conditions are called dead-lock and live-lock. The former refers to processes which are blocking each other, thus preventing either from executing. The latter refers to processes which prevent each other from progressing, but do not actually block the execution. For instance, they might continually cause each other to rollback transactions, neither ever being able to finish them. Another condition is known as resource

As per the latest update of Kindle V2.5, it has support of "continue downloading books while the app is in the background on iOS 4 devices". How is it possible to download content in background? As per the iOS multitasking documentation , only audio, voip & location updates are possible in background. And I've also maken sure that NSURLConnection doesn't download new data work while app goes background. Then how's it possible with Kindle app? Edit: I haven't checked Kindle App in iOS4 multitasking enabled device. So if anyone let me (& community) know what exactly Kindle app does to download,

I have an audio application which works great for iPhone 3.1.x versions. I am trying to upgrade it to iOS4.0 to work in multitasking environment. When I try to create a new UIBackgroundModes key in info.plist , it ("Required Background Modes") doesn't show up in drop down list? I also upgraded the Xcode SDK to 3.2.3, Base SDK to 4.0, deployment target to 4.0 but still UIBackgroundModes ("Required Background Modes") won't show up in info.plist drop down list. I also created test project for 4.0, and its info.list drop down list has "Required Background Modes". Did I miss something? You can add