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POiOS media picker does not show up
 

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  1. POiOS media picker does not show up
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    <p>I am currently working on an audio application on iPhone. It is based on apple's SpeakHere sample code with a user-defined input file from iPod library. </p> <p>Here is the event raised by the button:</p> <pre><code>- (IBAction) btn_PickSong_Clicked:(id)sender{ [self showMediaPicker]; //code importing tracks from library } </code></pre> <p>And in showMediaPicker method:</p> <pre><code>//Yup the program does reach this method but the picker does not show up - (void)showMediaPicker { MPMediaPickerController* mediaPicker = [[[MPMediaPickerController alloc] initWithMediaTypes:MPMediaTypeMusic] autorelease]; mediaPicker.delegate = self; [self presentModalViewController:mediaPicker animated:YES]; } </code></pre> <p>The problems are: </p> <ol> <li><p>The library import feature works fine in a separate program, but the media picker does not show up anymore when I put the code into <code>SpeakHereController.mm</code>. </p></li> <li><p>Also if I place the showMediaPicker method in another class and call it, it does not work either.</p></li> </ol> <p>Something I find it might be relevant: </p> <ol> <li><p>The original code is in an obj-C file (xxx.m), and now it's transferred into an obj-C++ file (xxx.mm). </p></li> <li><p>I have also modified the base class of <code>SpeakHereController.h</code> from <code>NSObject</code> to <code>UIViewController&lt;MPMediaPickerControllerDelegate&gt;</code> otherwise it will throw a warning that the base class does not contain the required delegate. But in the interface builder it is still displayed as an object (Please refer to SpeakHere sample code).</p></li> <li><p>It seems that it's illegal to convert the built-in <code>xxxViewController.m</code> file to obj-C++ file (.mm extension). In this case a lot of errors will show up if I attempt to do so. Is it true? If so, how to include C++ code in a pure obj-C file?</p></li> </ol> <p>=============</p> <p>So how can I make the media picker show up in this case? Any insight will be appreciated. </p> <p>Thank you very much!</p> <p>Cheers,</p> <p>Manca</p>
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    1. COWhich specific c++ features do you require in your controller, and why?
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      1. USPeter DeWeese
    2. CO@Peter DeWeese it is the CAStreamDescription.cpp, which is provided by apple's iPublicUtility. Every time I try to import it in my view controller a lot of errors occur at their inline methods. I guess it could be where the problem lies.
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