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在我的iPhone應用程序中，我使用AVAudioPlayer播放音樂。當我的應用程序在後臺運行，當時還正在運行的THT我在AppDelegate中寫了這個代碼iPhone應用程序：在AVAudio播放器中不恢復音頻會話
上 - 應用程序didFinishLaunchingWithOptions
audioManager= [[AudioManager alloc] init];
audioManager.delegate=self;
audioManager.soundFile=[[[NSBundle mainBundle] pathForResource:@"mysong" ofType:@"wav"] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
[audioManager setFileForPlay];
[audioManager.player setNumberOfLoops:-1];
[audioManager.player setVolume:.5];
[audioManager play];
-(void) playerBeginInterruption:(AVAudioPlayer *)p{
[usdef setValue:@"START" forKey:@"LOCATIONMANAGER"];
[locationManager startUpdatingLocation];
[p pause];
// audioManager=nil;
}
-(void) playerBeginInterruptionInBackground:(AVAudioPlayer *)p{
[usdef setValue:@"START" forKey:@"LOCATIONMANAGER"];
[locationManager startUpdatingLocation];
[p pause];
//audioManager=nil;
}
-(void) playerEndInterruption:(AVAudioPlayer *)p{
NSLog(@"Inteerpt END");
[p prepareToPlay];
[p play];
[usdef setValue:@"STOP" forKey:@"LOCATIONMANAGER"];
}
-(void) playerEndInterruptionInBackgroud:(AVAudioPlayer *)p{
NSLog(@"Inteerpt END BG");
// [self performSelector:@selector(allocaudioManager)];
[p prepareToPlay];
[p play];
[usdef setValue:@"STOP" forKey:@"LOCATIONMANAGER"];
// [locationManager stopUpdatingLocation];
}
現在我已經創造了saperate類音頻管理器，它HANDELS委託在.m文件方法
在.h文件中
#import <Foundation/Foundation.h>
#import <AudioToolbox/AudioToolbox.h>
#import <AVFoundation/AVFoundation.h>
@protocol AudioManagerDelegate;
@interface AudioManager : NSObject <AVAudioPlayerDelegate> {
AVAudioPlayer *player;
NSString *soundFile;
BOOL inBackground;
id<AudioManagerDelegate> delegate;
}
@property (nonatomic, assign) id<AudioManagerDelegate>delegate;
@property (nonatomic, retain) NSString *soundFile;
@property (nonatomic, assign) AVAudioPlayer *player;
@property (nonatomic, assign) BOOL inBackground;
- (void)play;
- (void)pause;
- (void)stop;
- (void)registerForBackgroundNotifications;
-(void) setFileForPlay;
@end
@protocol AudioManagerDelegate <NSObject>
@optional
- (void)playerDidFinishPlayingInBackground:(AVAudioPlayer*)p;
- (void)playerDidFinishPlaying:(AVAudioPlayer*)p;
- (void)playerBeginInterruption:(AVAudioPlayer*)p;
- (void)playerBeginInterruptionInBackground:(AVAudioPlayer*)p;
- (void)playerEndInterruption:(AVAudioPlayer *)p;
- (void)playerEndInterruptionInBackgroud:(AVAudioPlayer *)p;
@end
@implementation AudioManager
@synthesize delegate;
@synthesize player;
@synthesize inBackground;
@synthesize soundFile;
void RouteChangeListener(void *inClientData, AudioSessionPropertyID inID,UInt32 inDataSize, const void *inData);
-(id) init
{
if((self=[super init]))
{
OSStatus result = AudioSessionInitialize(NULL, NULL, NULL, NULL);
if (result)
NSLog(@"Error initializing audio session! %ld", result);
[[AVAudioSession sharedInstance] setDelegate: self];
NSError *setCategoryError = nil;
[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayback error: &setCategoryError];
if (setCategoryError)
NSLog(@"Error setting category! %@", setCategoryError);
result = AudioSessionAddPropertyListener (kAudioSessionProperty_AudioRouteChange, RouteChangeListener, self);
if (result)
NSLog(@"Could not add property listener! %ld", result);
return self;
}
return nil;
}
-(void) setFileForPlay{
self.player=nil;
player = [[AVAudioPlayer alloc] initWithData:[NSData dataWithContentsOfFile:self.soundFile] error:nil];//initWithContentsOfURL:[NSURL URLWithString:self.soundFile] error:nil];
if (self.player)
{
player.delegate = self;
}
}
-(void) play{
[self.player play];
}
-(void)pause{
[self.player pause];
NSLog(@"in Pause");
}
-(void)stop{
[self.player stop];
NSLog(@"in stop");
}
void RouteChangeListener(void *inClientData, AudioSessionPropertyID inID,UInt32 inDataSize, const void *inData){
AudioManager* This = (AudioManager*)inClientData;
if (inID == kAudioSessionProperty_AudioRouteChange) {
CFDictionaryRef routeDict = (CFDictionaryRef)inData;
NSNumber* reasonValue = (NSNumber*)CFDictionaryGetValue(routeDict, CFSTR(kAudioSession_AudioRouteChangeKey_Reason));
int reason = [reasonValue intValue];
if (reason == kAudioSessionRouteChangeReason_OldDeviceUnavailable) {
[This stop];
}
}
}
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)p successfully:(BOOL)flag
{
if (flag == NO)
NSLog(@"Playback finished unsuccessfully");
[p setCurrentTime:0.];
if (inBackground)
{
[delegate playerDidFinishPlayingInBackground:p];
}
else
{
[delegate playerDidFinishPlaying:p];
}
}
- (void)playerDecodeErrorDidOccur:(AVAudioPlayer *)p error:(NSError *)error
{
NSLog(@"ERROR IN DECODE: %@\n", error);
}
// we will only get these notifications if playback was interrupted
- (void)audioPlayerBeginInterruption:(AVAudioPlayer *)p
{
NSLog(@"Interruption begin ");
// the object has already been paused, we just need to update UI
if (inBackground)
{
[delegate playerBeginInterruptionInBackground:p];
}
else
{
[delegate playerBeginInterruption:p];
}
}
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)p withFlags:(NSUInteger)flags
{
if(inBackground)
{
[delegate playerEndInterruptionInBackgroud:p];
}
else
{
[delegate playerEndInterruption:p];
}
NSLog(@"Interruption ended. Resuming playback");
}
- (void)registerForBackgroundNotifications
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(setInBackgroundFlag)
name:UIApplicationWillResignActiveNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(clearInBackgroundFlag)
name:UIApplicationWillEnterForegroundNotification
object:nil];
}
- (void)setInBackgroundFlag
{
inBackground = true;
}
- (void)clearInBackgroundFlag
{
inBackground = false;
}
@end
現在的問題是，如果我打任何歌曲形成的iPod圖書館和停止樂曲和關閉的iPod庫，我原來avaudioplayer這是開始的IPO庫之前打不恢復意味着它不會被再次playong歌
什麼可能是錯的？
是否有任何演示項目或示例代碼可以幫助我？
請幫助和建議。
你是說，在你的應用程序，你有一個AVAudioPlayer玩一些音樂文件添加到您的項目。然後，當你離開應用程序並打開iPod播放器並播放歌曲，然後重新打開你的應用程序，它不會恢復原始歌曲，而是恢復到你的iPod庫？ – Eric
不，它不是從iPod庫它是音頻文件，我已經包含到我的項目 – ios
在這種情況下，我總是使用方法applicationWillResignActive和applicationDidBecomeActive在您的應用程序委託來暫停並啓動您的AVAudioPlayer。 – Eric