我不知道问题的原因是什么，当播放器尝试播放测试音频文件时它崩溃了，但仅在模拟器中。在真实设备上运行良好。如果你想看一下，我已经粘贴了下面的代码，包括它给我的一些调试信息......在设备本身上？
这个 isa -> 未知类可能是问题吗？
[p play]它在这种方法中崩溃：
-(void)startPlaybackForPlayer:(AVAudioPlayer*)p
{
if ([p play])
{
[self updateViewForPlayerState:p];
}
else
NSLog(@"Could not play %@\n", p.url);
}
-
#import "AudioPlayerViewController.h"
@interface AudioPlayerViewController ()
{
//AVAudioPlayer *player;
}
@property (nonatomic,strong) AVAudioPlayer *player;
@end
@implementation AudioPlayerViewController
-(void)updateCurrentTimeForPlayer:(AVAudioPlayer *)p
{
self.currentTime.text = [NSString stringWithFormat:@"%d:%02d", (int)p.currentTime / 60, (int)p.currentTime % 60, nil];
self.progressBar.value = p.currentTime;
}
- (void)updateCurrentTime
{
[self updateCurrentTimeForPlayer:self.player];
}
- (void)updateViewForPlayerState:(AVAudioPlayer *)p
{
[self updateCurrentTimeForPlayer:p];
if (self.updateTimer)
[self.updateTimer invalidate];
if (p.playing)
{
[self.playButton setImage:((p.playing == YES) ? pauseBtnBG : playBtnBG) forState:UIControlStateNormal];
//[lvlMeter_in setPlayer:p];
self.updateTimer = [NSTimer scheduledTimerWithTimeInterval:.01 target:self selector:@selector(updateCurrentTime) userInfo:p repeats:YES];
}
else
{
[self.playButton setImage:((p.playing == YES) ? pauseBtnBG : playBtnBG) forState:UIControlStateNormal];
//[lvlMeter_in setPlayer:nil];
self.updateTimer = nil;
}
}
- (void)updateViewForPlayerStateInBackground:(AVAudioPlayer *)p
{
[self updateCurrentTimeForPlayer:p];
if (p.playing)
{
[self.playButton setImage:((p.playing == YES) ? pauseBtnBG : playBtnBG) forState:UIControlStateNormal];
}
else
{
[self.playButton setImage:((p.playing == YES) ? pauseBtnBG : playBtnBG) forState:UIControlStateNormal];
}
}
-(void)updateViewForPlayerInfo:(AVAudioPlayer*)p
{
self.duration.text = [NSString stringWithFormat:@"%d:%02d", (int)p.duration / 60, (int)p.duration % 60, nil];
self.progressBar.maximumValue = p.duration;
self.volumeSlider.value = p.volume;
}
- (void)rewind
{
//AVAudioPlayer *p = rewTimer.userInfo;
//p.currentTime-= SKIP_TIME;
//[self updateCurrentTimeForPlayer:p];
}
- (void)ffwd
{
//AVAudioPlayer *p = ffwTimer.userInfo;
//p.currentTime+= SKIP_TIME;
//[self updateCurrentTimeForPlayer:p];
}
- (void)viewDidLoad
{
[super viewDidLoad];
NSLog(@"### AudioPlayerViewController Initiallized");
playBtnBG = [UIImage imageNamed:@"play.png"]; // Retain, maybe make strong
pauseBtnBG = [UIImage imageNamed:@"pause.png"];
[self.playButton setImage:playBtnBG forState:UIControlStateNormal];
[self registerForBackgroundNotifications];
self.updateTimer = nil;
//rewTimer = nil;
//ffwTimer = nil;
self.duration.adjustsFontSizeToFitWidth = YES;
self.currentTime.adjustsFontSizeToFitWidth = YES;
self.progressBar.minimumValue = 0.0;
// Load the the sample file, use mono or stero sample
#warning samplefile does not exist
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: [[NSBundle mainBundle] pathForResource:@"bubbles" ofType:@"m4a"]];
//NSURL *fileURL = [[NSURL alloc] initFileURLWithPath: [[NSBundle mainBundle] pathForResource:@"sample2ch" ofType:@"m4a"]];
self.player = [[AVAudioPlayer alloc] initWithContentsOfURL:fileURL error:nil];
if (self.player)
{
self.fileName.text = [NSString stringWithFormat: @"%@ (%d ch.)", [[self.player.url relativePath] lastPathComponent], self.player.numberOfChannels, nil];
[self updateViewForPlayerInfo:self.player];
[self updateViewForPlayerState:self.player];
self.player.numberOfLoops = 1;
self.player.delegate = self;
}
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);
#warning did change here - migth cause bug
//result = AudioSessionAddPropertyListener (kAudioSessionProperty_AudioRouteChange, RouteChangeListener, (__bridge void *)(self));
if (result)
NSLog(@"Could not add property listener! %ld", result);
/*
[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];
[[AVAudioSession sharedInstance] setActive: YES error: nil];
self.player.delegate = self;
[self.player prepareToPlay];
[self playAudio];
*/
}
-(void)pausePlaybackForPlayer:(AVAudioPlayer*)p
{
[p pause];
[self updateViewForPlayerState:p];
}
-(void)startPlaybackForPlayer:(AVAudioPlayer*)p
{
if ([p play])
{
[self updateViewForPlayerState:p];
}
else
NSLog(@"Could not play %@\n", p.url);
}
- (IBAction)playButtonPressed:(UIButton *)sender
{
if (self.player.playing == YES)
[self pausePlaybackForPlayer: self.player];
else
[self startPlaybackForPlayer: self.player];
}
- (IBAction)rewButtonPressed:(UIButton *)sender
{
/*
if (rewTimer) [rewTimer invalidate];
rewTimer = [NSTimer scheduledTimerWithTimeInterval:SKIP_INTERVAL target:self selector:@selector(rewind) userInfo:player repeats:YES];
*/
}
- (IBAction)rewButtonReleased:(UIButton *)sender
{
/*
if (rewTimer) [rewTimer invalidate];
rewTimer = nil;
*/
}
- (IBAction)ffwButtonPressed:(UIButton *)sender
{
/*
if (ffwTimer) [ffwTimer invalidate];
ffwTimer = [NSTimer scheduledTimerWithTimeInterval:SKIP_INTERVAL target:self selector:@selector(ffwd) userInfo:player repeats:YES];
*/
}
- (IBAction)ffwButtonReleased:(UIButton *)sender
{
/*
if (ffwTimer) [ffwTimer invalidate];
ffwTimer = nil;
*/
}
- (IBAction)volumeSliderMoved:(UISlider *)sender
{
self.player.volume = [sender value];
}
- (IBAction)progressSliderMoved:(UISlider *)sender
{
self.player.currentTime = sender.value;
[self updateCurrentTimeForPlayer:self.player];
}
#pragma mark AudioSession handlers
/**
void RouteChangeListener( void * inClientData,
AudioSessionPropertyID inID,
UInt32 inDataSize,
const void * inData)
{
avTouchController* This = (avTouchController*)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 pausePlaybackForPlayer:This.player];
}
}
}*/
#pragma mark AVAudioPlayer delegate methods
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)p successfully:(BOOL)flag
{
if (flag == NO)
NSLog(@"Playback finished unsuccessfully");
[p setCurrentTime:0.];
if (self.inBackground)
{
[self updateViewForPlayerStateInBackground:p];
}
else
{
[self updateViewForPlayerState: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. Updating UI for new state");
// the object has already been paused, we just need to update UI
if (self.inBackground)
{
[self updateViewForPlayerStateInBackground:p];
}
else
{
[self updateViewForPlayerState:p];
}
}
- (void)audioPlayerEndInterruption:(AVAudioPlayer *)p
{
NSLog(@"Interruption ended. Resuming playback");
[self startPlaybackForPlayer:p];
}
#pragma mark background notifications
- (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
{
self.inBackground = true;
}
- (void)clearInBackgroundFlag
{
self.inBackground = false;
}
- (void)playAudio
{
// Move operation to new thread
dispatch_queue_t playAudiofile = dispatch_queue_create("play audiofile", NULL);
dispatch_async(playAudiofile, ^{
NSLog(@"Playing audiofile in new thread: %@", self.audiofile);
NSAssert(![self.audiofile isEqualToString:@""], @"audiofile must be specified.");
NSError *audioError;
NSString *soundFilePath = [[NSBundle mainBundle]pathForResource:self.audiofile ofType:@"mp3"];
NSAssert(soundFilePath != NULL, @"Sound File Not found");
NSURL *soundFileURL = [NSURL URLWithString:soundFilePath];
self.player = [[AVAudioPlayer alloc]initWithContentsOfURL:soundFileURL error:&audioError];
[self.player play];
});
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
frame #0: 0x020b4b54 libc++abi.dylib`__cxa_throw
frame #1: 0x0e215a41 AudioCodecs`ACBaseCodec::GetProperty(unsigned long, unsigned long&, void*) + 757
frame #2: 0x0e237618 AudioCodecs`ACMP4AACBaseDecoder::GetProperty(unsigned long, unsigned long&, void*) + 2458
frame #3: 0x0e235b83 AudioCodecs`ACMP4AACLowComplexityDecoder::GetProperty(unsigned long, unsigned long&, void*) + 565
frame #4: 0x0e28d4b4 AudioCodecs`GetProperty(void*, unsigned long, unsigned long*, void*) + 47
frame #5: 0x001347a8 AudioToolbox`AudioCodecGetProperty + 88
frame #6: 0x000392db AudioToolbox`CodecConverter::CheckInitialize(void const*, unsigned long) + 523
frame #7: 0x00038f34 AudioToolbox`CodecConverter::CodecConverter(OpaqueAudioComponent*&, OpaqueAudioComponentInstance*, StreamDescPair const&, StreamDescPair const&, bool, AudioConverterPrimeInfo const&) + 676
frame #8: 0x00038c7e AudioToolbox`CodecConverter::CodecConverter(OpaqueAudioComponent*&, OpaqueAudioComponentInstance*, StreamDescPair const&, StreamDescPair const&, bool, AudioConverterPrimeInfo const&) + 62
frame #9: 0x0003ddf7 AudioToolbox`CodecDecoderFactory::BuildCodecConverterChain(StreamDescPair const&, ChainBuildSettings const&, AudioConverterChain*, PCMConverterFactory*) + 631
frame #10: 0x0002647c AudioToolbox`ConverterRegistry::CreateConverter(StreamDescPair const&, AudioConverterChain**, unsigned long, AudioClassDescription const*) + 204
frame #11: 0x00019ba0 AudioToolbox`_AudioConverterNewInternal + 352
frame #12: 0x00060a00 AudioToolbox`AudioQueueObject::ConverterConnection::BuildConverter() + 416
frame #13: 0x000607e2 AudioToolbox`AudioQueueObject::ConverterConnection::ConverterConnection(AudioQueueObject&, long&) + 130
frame #14: 0x000620bc AudioToolbox`AudioQueueObject::IONodeConnection::GetConverterConnection_Init(long&) + 60
frame #15: 0x00065803 AudioToolbox`AudioQueueObject::SetProperty(unsigned long, CADeserializer&) + 1123
frame #16: 0x0008c44a AudioToolbox`AQServer_SetProperty + 106
frame #17: 0x00092276 AudioToolbox`AudioQueueSetProperty + 374
frame #18: 0x004c1d2b AVFoundation`AVAudioPlayerCpp::allocAudioQueue() + 683
frame #19: 0x004c13be AVFoundation`AVAudioPlayerCpp::prepareToPlayQueue() + 26
frame #20: 0x004bfebe AVFoundation`AVAudioPlayerCpp::prepareToPlay() + 84
frame #21: 0x004129f7 AVFoundation`-[AVAudioPlayer prepareToPlay] + 59
frame #22: 0x00006b7e SteinerAudio`-[AudioPlayerViewController viewDidLoad](self=0x07ad3cf0, _cmd=0x00b98a77) + 3694 at AudioPlayerViewController.mm:160
frame #23: 0x006c71c7 UIKit`-[UIViewController loadViewIfRequired] + 536
frame #24: 0x006c7232 UIKit`-[UIViewController view] + 33
frame #25: 0x006c74da UIKit`-[UIViewController contentScrollView] + 36
frame #26: 0x006de8e5 UIKit`-[UINavigationController _computeAndApplyScrollContentInsetDeltaForViewController:] + 36
frame #27: 0x006de9cb UIKit`-[UINavigationController _layoutViewController:] + 43
frame #28: 0x006dec76 UIKit`-[UINavigationController _updateScrollViewFromViewController:toViewController:] + 254
frame #29: 0x006ded71 UIKit`-[UINavigationController _startTransition:fromViewController:toViewController:] + 72
frame #30: 0x006df89b UIKit`-[UINavigationController _startDeferredTransitionIfNeeded:] + 386
frame #31: 0x006dfe93 UIKit`-[UINavigationController pushViewController:transition:forceImmediate:] + 1030
frame #32: 0x006dfa88 UIKit`-[UINavigationController pushViewController:animated:] + 62
frame #33: 0x00a3be63 UIKit`-[UIStoryboardPushSegue perform] + 1111
frame #34: 0x00a2db99 UIKit`-[UIStoryboardSegueTemplate _perform:] + 174
frame #35: 0x00a2dc14 UIKit`-[UIStoryboardSegueTemplate perform:] + 115
frame #36: 0x00695249 UIKit`-[UITableView _selectRowAtIndexPath:animated:scrollPosition:notifyDelegate:] + 1134
frame #37: 0x006954ed UIKit`-[UITableView _userSelectRowAtPendingSelectionIndexPath:] + 201
frame #38: 0x0109f5b3 Foundation`__NSFireDelayedPerform + 380
frame #39: 0x0199f376 CoreFoundation`__CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 22
frame #40: 0x0199ee06 CoreFoundation`__CFRunLoopDoTimer + 534
frame #41: 0x01986a82 CoreFoundation`__CFRunLoopRun + 1810
frame #42: 0x01985f44 CoreFoundation`CFRunLoopRunSpecific + 276
frame #43: 0x01985e1b CoreFoundation`CFRunLoopRunInMode + 123
frame #44: 0x028557e3 GraphicsServices`GSEventRunModal + 88
frame #45: 0x02855668 GraphicsServices`GSEventRun + 104
frame #46: 0x005e5ffc UIKit`UIApplicationMain + 1211
frame #47: 0x0000237d SteinerAudio`main(argc=1, argv=0xbffff3a0) + 141 at main.m:16