cocoa touch - Media Callbacks with Embedded YouTube Videos on iOS

Question

I’m embedding YouTube videos in a UIWebView for an iOS app. I’m using “Method 2” at this YouTube blog post to embed the video. This works great, except that because iOS manages the media player, I can’t determine whether the video is playing or is done. I don’t want to swap that view out with another one while the video is playing, but I don’t see a good way to determine that. Any ideas? If there’s a way to get a JavaScript callback, that will work, or if there’s a way to embed YouTube videos using the HTML5 <video> tag, that will work as well (I’ve tried that and not gotten success).

Answer 1

Just add observer for MPAVControllerPlaybackStateChangedNotification.

[[NSNotificationCenter defaultCenter] addObserver:self
                                             selector:@selector(playbackStateDidChange:)
                                                 name:@"MPAVControllerPlaybackStateChangedNotification"
                                               object:nil];

then start listening:

- (void)playbackStateDidChange:(NSNotification *)note
{
    NSLog(@"note.name=%@ state=%d", note.name, [[note.userInfo objectForKey:@"MPAVControllerNewStateParameter"] intValue]);
    int playbackState = [[note.userInfo objectForKey:@"MPAVControllerNewStateParameter"] intValue];
    switch (playbackState) {
        case 1: //end
            ;
            break;
        case 2: //start
            ;
            break;    
        default:
            break;
    }
}

Explore other states if you're curious. Additionally everyone interested in bunch of other notifications can register to see all:

CFNotificationCenterAddObserver(CFNotificationCenterGetLocalCenter(), 
                                    NULL, 
                                    noteCallbackFunction, 
                                    NULL, 
                                    NULL,  
                                    CFNotificationSuspensionBehaviorDeliverImmediately);

then check what's coming on:

void noteCallbackFunction (CFNotificationCenterRef center,
                 void *observer,
                 CFStringRef name,
                 const void *object,
                 CFDictionaryRef userInfo)
{
    NSLog(@"notification name: %@", name);
    NSLog(@"notification info: %@", userInfo);
}

Have fun!