我正在使用xcode 4.2并构建一个iphone应用程序,并且有一个视图,当打开时播放音频流。
我试图实现的是让应用程序继续播放,即使它进入后台
我已经尝试了在stackoverflow或其他地方找到的任何可能的解决方案(并且有许多可用的),但无法使其工作。当应用程序进入后台时,音频停止,当我再次打开应用程序时,音频继续。
在我的Info.plist中,我设置了2行:
Required Background Modes -> App plays audio
&
Application does not run in background -> NO
我缺少什么?还有什么需要继续在后台播放音频?
提前谢谢。
编辑: 我在这个问题上看到很多答案,建议使用AVAudio Framework。 MPMoviePlayerController是否有可能无法在后台播放流?我应该换成AVAudio吗?
编辑2:
好吧,似乎对我来说太复杂了。我给出了确切的代码,希望这会有所帮助。
RadioStreamer.h
#import <UIKit/UIKit.h>
#import "MediaPlayer/MediaPlayer.h"
@interface RadioStreamer : UIViewController {
MPMoviePlayerController *player;
IBOutlet UIButton *playButton;
IBOutlet UIButton *pauseButton;
}
@property (nonatomic, retain) MPMoviePlayerController *player;
@property (nonatomic, retain) IBOutlet UIButton *playButton;
@property (nonatomic, retain) IBOutlet UIButton *pauseButton;
- (IBAction)playButtonPressed:(id)button;
- (IBAction)pauseButtonPressed:(id)button;
- (void) playAudio;
- (void) pauseAudio;
@end
RadioStreamer.m
#import "RadioStreamer.h"
#import "tabbartestAppDelegate.h"
@implementation RadioStreamer
@synthesize player;
@synthesize playButton;
@synthesize pauseButton;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
return self;
}
#pragma mark - View lifecycle
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.title=@"";
// Do any additional setup after loading the view from its nib.
if (!self.player) {
player = [[MPMoviePlayerController alloc] initWithContentURL:[NSURL URLWithString:@"http://s6.onweb.gr:8006/listen.pls"]];
player.movieSourceType = MPMovieSourceTypeStreaming;
player.view.frame = CGRectMake(55, 180, 200, 30);
player.backgroundView.backgroundColor = [UIColor clearColor];
player.view.backgroundColor = [UIColor clearColor];
[self.view addSubview:player.view];
[player play];
}
}
- (void) playAudio {
if (player.playbackState != MPMoviePlaybackStatePlaying){
[player play];
}
}
- (void) pauseAudio {
if (player.playbackState == MPMoviePlaybackStatePlaying) {
[player pause];
}
}
- (IBAction)playButtonPressed:(id)button {
[self playAudio];
}
- (IBAction)pauseButtonPressed:(id)button {
[self pauseAudio];
}
- (void)viewDidUnload
{
[super viewDidUnload];
}
- (void)dealloc {
[self.player release];
[self.playButton release];
[self.pauseButton release];
self.player = nil;
self.playButton = nil;
self.pauseButton = nil;
}
@end
答案 0 :(得分:6)
检查您的音频会话设置,因为可能需要额外注意。
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback
error:nil];
[[AVAudioSession sharedInstance] setActive:YES
error:nil];
[[UIApplication sharedApplication] beginReceivingRemoteControlEvents];
答案 1 :(得分:0)
在这个地方如何偶然发现编程教程。 http://mobisoftinfotech.com/integrate-music-player-in-iphone/
这应该在应用内播放音乐,如果你在后台使用你的应用程序也可以继续播放。