我想从ipod Library中选择歌曲并使用avplayer播放我希望音乐继续播放,即使应用程序进入后台我是iOS编程新手也可以帮助我…
谢谢
解决方法
要允许用户从其音乐库中选择一首歌曲(或多首歌曲),请使用MPMediaPickerController类.
-(void) pickSong {
// Create picker view
MPMediaPickerController* picker = [[MPMediaPickerController alloc] init];
picker.delegate = self;
// Check how to display
if ([UIDevice currentDevice].userInterfaceIdiom == UIUserInterfaceIdiomPad) {
// Show in popover
[popover dismissPopoverAnimated:YES];
popover = [[UIPopoverController alloc] initWithContentViewController:picker];
[popover presentPopoverFromBarButtonItem:self.navigationItem.rightBarButtonItem permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
} else {
// Present modally
[self presentViewController:picker animated:YES completion:nil];
}
}
如果您没有从标题栏右侧的按钮显示,请更改self.navigationItem.rightBarButtonItem.
然后你需要通过实现委托来监听结果：
-(void) mediaPickerDidCancel:(MPMediaPickerController *)mediaPicker {
// Dismiss selection view
[self dismissViewControllerAnimated:YES completion:nil];
[popover dismissPopoverAnimated:YES];
popover = nil;
}
-(void) mediaPicker:(MPMediaPickerController *)mediaPicker didPickMediaItems:(MPMediaItemCollection *)mediaItemCollection {
// Dismiss selection view
[self dismissViewControllerAnimated:YES completion:nil];
[popover dismissPopoverAnimated:YES];
popover = nil;
// Get AVAsset
NSURL* assetUrl = [mediaItemCollection.representativeItem valueForProperty:MPMediaItemPropertyAssetURL];
AVURLAsset* asset = [AVURLAsset URLAssetWithURL:assetUrl options:nil];
// Create player item
AVPlayerItem* playerItem = [AVPlayerItem playerItemWithAsset:asset];
// Play it
AVPlayer* myPlayer = [AVPlayer playerWithPlayerItem:playerItem];
[myPlayer play];
}
你需要一个UIPopoverController * popover;在你的班.h文件中.你也应该在某处保留myPlayer …