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How to check if MPMediaLibrary did change ?

Gi-loGi-lo Posts: 28Registered Users
in iPhone SDK Development
Hey folks ;),

I am building a music application and therefore I cache some data which I grab from the users iPod library first. I need to recreate the cache whenever the iPod library changes so I took a look at MPMediaLibrary.

Actually I found 2 interesting things:

lastModificationDate ->
Due to some googling, I know that this also gets called when the user creates a new playlist or such. Even worse, in my case it shows up the same date all the time.

NSLog(@\"%@\", [[MPMediaLibrary defaultMediaLibrary] lastModifiedDate]); // Always the same date


beginGeneratingLibraryChangeNotifications ->
The problem I have with this, is that after the notification is sent the MPMediaQuery is still the same. After around 5 seconds it changes. I dont want to let my users wait 5 seconds ... :/

[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(_handle_MediaLibraryDidChangeNotification)
                                                 name:MPMediaLibraryDidChangeNotification
                                               object:[MPMediaLibrary defaultMediaLibrary]];
    [[MPMediaLibrary defaultMediaLibrary] beginGeneratingLibraryChangeNotifications];


All in all I am pretty frustrated now. Is there no way to check if the iPod library did change?
Post edited by Gi-lo on
Please follow me on Twitter and take a look at my website.

Feel free to add me on AIM (GiloMTTM) to ask me whatever you want <img src="http://www.
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Replies

  • iSDKiSDK Posts: 1,353Tutorial Authors, Registered Users
    Might help, iphone - Load songs from iPod Library right after sync - Stack Overflow

    Max.
    Gi-lo;358355 said:
    Hey folks ;),

    I am building a music application and therefore I cache some data which I grab from the users iPod library first. I need to recreate the cache whenever the iPod library changes so I took a look at MPMediaLibrary.

    Actually I found 2 interesting things:

    lastModificationDate ->
    Due to some googling, I know that this also gets called when the user creates a new playlist or such. Even worse, in my case it shows up the same date all the time.

    NSLog(@\"%@\", [[MPMediaLibrary defaultMediaLibrary] lastModifiedDate]); // Always the same date


    beginGeneratingLibraryChangeNotifications ->
    The problem I have with this, is that after the notification is sent the MPMediaQuery is still the same. After around 5 seconds it changes. I dont want to let my users wait 5 seconds ... :/

    [[NSNotificationCenter defaultCenter] addObserver:self
                                                 selector:@selector(_handle_MediaLibraryDidChangeNotification)
                                                     name:MPMediaLibraryDidChangeNotification
                                                   object:[MPMediaLibrary defaultMediaLibrary]];
        [[MPMediaLibrary defaultMediaLibrary] beginGeneratingLibraryChangeNotifications];


    All in all I am pretty frustrated now. Is there no way to check if the iPod library did change?
    Flag • Off Topic Insightful Disagree Dislike Like Awesome
  • Gi-loGi-lo Posts: 28Registered Users
    iSDK;358362 said:
    Might help, iphone - Load songs from iPod Library right after sync - Stack Overflow

    Max.
    Thanks for the tip but initializing an instance of MPMediaPicker is always not nil for me. Also I cannot listen for "lastModificationDate" changes, as in my case it is never changing :/
    Please follow me on Twitter and take a look at my website.

    Feel free to add me on AIM (GiloMTTM) to ask me whatever you want <img src="http://www.
    Flag • Off Topic Insightful Disagree Dislike Like Awesome
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