Tho*_*ard 3 objective-c avfoundation audio-streaming avplayer
我正在尝试做一个非常简单的应用程序,目的是监听音频流(AAC 64 kbps).为此,我使用AVPlayer了Apple AVFoundation以下内容:
ViewController.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
@synthesize playerItem, player;
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (void) viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
playerItem = [AVPlayerItem playerItemWithURL:[NSURL URLWithString:@"http://stream.myjungly.fr/MYJUNGLY2"]];
[playerItem addObserver:self forKeyPath:@"timedMetadata" options:NSKeyValueObservingOptionNew context:nil];
player = [AVPlayer playerWithPlayerItem:playerItem];
[player play];
NSLog(@"player item error : %@", playerItem.error.description);
NSLog(@"player error : %@", player.error.description);
}
- (void) observeValueForKeyPath:(NSString*)keyPath ofObject:(id)object
change:(NSDictionary*)change context:(void*)context {
if ([keyPath isEqualToString:@"timedMetadata"])
{
AVPlayerItem* _playerItem = object;
for (AVMetadataItem* metadata in _playerItem.timedMetadata)
{
NSLog(@"\nkey: %@\nkeySpace: %@\ncommonKey: %@\nvalue: %@", [metadata.key description], metadata.keySpace, metadata.commonKey, metadata.stringValue);
}
}
}
@end
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我的目标player,并playerItem有强大的性能:
ViewController.h
@interface ViewController : UIViewController
@property (nonatomic, strong) AVPlayerItem* playerItem;
@property (nonatomic, strong) AVPlayer* player;
@end
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Key Value Observer工作得很好,这是我的日志:
2013-05-14 11:18:03.725 MusicAvPlayer[6494:907] player item error : (null)
2013-05-14 11:18:03.728 MusicAvPlayer[6494:907] player error : (null)
2013-05-14 11:18:08.140 MusicAvPlayer[6494:907]
key: title
keySpace: comn
commonKey: title
value: Alabama Shakes - Be Mine
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但音频没有播放,我没有声音!知道为什么吗?
编辑:我已经看过这个问题了:
这就是为什么我使用强大的属性,所以我猜我的问题不是ARC相关的
我发现问题:iphone处于静音模式......因此扬声器上没有声音,当我使用头戴式耳机时播放声音.
但我现在有了一个新问题:当手机处于静音模式时,你怎么能在扬声器上播放声音?(像官方音乐应用程序)
编辑:...答案就在那里: 即使在静音模式下也能在iPhone上播放声音
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