廢話不多說說一下現狀

網上好多關於揚聲器的操作，但是問題多多，SDK7.X 和SDK7.X以上版本有點詫異





#import

#import

#import



@interface AudioManager : NSObject

{

AVAudioPlayer *m_audioPlayer;

}



@property (atomic, readonly)BOOL _isSpeakerOn;

@property (atomic, readonly)BOOL _isHeadsetOn;



+(AudioManager*)shared;

// 打開揚聲器

- (void)setSpeakerOn;

// 關閉揚聲器

- (void)setSpeakerOff;

@end













//

// AudioManager.m

// AvconNetAndCallDemo

//

// Created by zjq on 14-7-21.

// Copyright (c) 2014年 zjq. All rights reserved.

//



#import AudioManager.h

#import

#define IOSVersion [[UIDevice currentDevice].systemVersion floatValue]



@implementation AudioManager

@synthesize _isSpeakerOn;

@synthesize _isHeadsetOn;



- (id)init

{

self = [super init];

if (self) {

_isSpeakerOn = NO;



AVAudioSession *audioSession = [AVAudioSession sharedInstance];

//默認情況下揚聲器播放

[audioSession setCategory:AVAudioSessionCategoryPlayback withOptions:AVAudioSessionCategoryOptionMixWithOthers error:nil];

[audioSession setActive:YES error:nil];



UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;

AudioSessionSetProperty(kAudioSessionProperty_AudioCategory,

sizeof(sessionCategory),

&sessionCategory);





UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;

AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,

sizeof (audioRouteOverride),

&audioRouteOverride);



AudioSessionAddPropertyListener (kAudioSessionProperty_AudioRouteChange,

audioRouteChangeListenerCallback, (__bridge void *)(self));



}

return self;

}





static AudioManager *_audioManager = NULL;

+(AudioManager*)shared

{

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{

_audioManager = [[AudioManager alloc] init];

});

return _audioManager;

}



- (void)setSpeakerOn

{

NSLog(@setSpeakerOn:%d,[NSThread isMainThread]);

UInt32 doChangeDefaultRoute = kAudioSessionOverrideAudioRoute_Speaker;



AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryDefaultToSpeaker,

sizeof (doChangeDefaultRoute),

&doChangeDefaultRoute

);



_isSpeakerOn = [self checkSpeakerOn];

_isHeadsetOn = NO;



//[self resetOutputTarget];



}



- (void)setSpeakerOff

{



UInt32 doChangeDefaultRoute = kAudioSessionOverrideAudioRoute_None;



AudioSessionSetProperty (kAudioSessionProperty_OverrideCategoryDefaultToSpeaker,

sizeof (doChangeDefaultRoute),

&doChangeDefaultRoute

);



_isSpeakerOn = [self checkSpeakerOn];

}



- (BOOL)checkSpeakerOn

{

CFStringRef route;

UInt32 propertySize = sizeof(CFStringRef);

AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &propertySize, &route);



if((route == NULL) || (CFStringGetLength(route) == 0))

{

// Silent Mode

NSLog(@AudioRoute: SILENT, do nothing!);

}

else

{

NSString* routeStr = (__bridge NSString*)route;

NSRange speakerRange = [routeStr rangeOfString : @Speaker];

if (speakerRange.location != NSNotFound)

return YES;

}



return NO;

}



- (BOOL)hasHeadset

{

CFStringRef route;

UInt32 propertySize = sizeof(CFStringRef);

AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &propertySize, &route);



if((route == NULL) || (CFStringGetLength(route) == 0))

{

// Silent Mode

NSLog(@AudioRoute: SILENT, do nothing!);

}

else

{

NSString* routeStr = (__bridge NSString*)route;

NSLog(@AudioRoute: %@, routeStr);

if ([routeStr isEqualToString:@ReceiverAndMicrophone]) {

// static dispatch_once_t onceToken;

// dispatch_once(&onceToken, ^{

// [self setSpeakerOn];

// });

[self setSpeakerOn];

}



NSRange headphoneRange = [routeStr rangeOfString : @Headphone];

NSRange headsetRange = [routeStr rangeOfString : @Headset];

if (headphoneRange.location != NSNotFound)

{

return YES;

} else if(headsetRange.location != NSNotFound)

{

return YES;

}

}

return NO;

}

// 判斷麥克風是否有用

- (BOOL)hasMicphone

{

return [[AVAudioSession sharedInstance] isInputAvailable];

}



- (void)erjiOutPutTarget

{

BOOL hasHeadset = [self hasHeadset];



if (hasHeadset) {

_isHeadsetOn = YES;

}

NSLog (@Will Set output target is_headset = %@ ., hasHeadset?@YES:@NO);

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_None;

AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);

}



- (void)resetOutputTarget

{

BOOL hasHeadset = [self hasHeadset];

NSLog (@Will Set output target is_headset = %@ ., hasHeadset?@YES:@NO);

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;

AudioSessionSetProperty(kAudioSessionProperty_OverrideAudioRoute, sizeof(audioRouteOverride), &audioRouteOverride);

_isHeadsetOn = NO;

}



void audioRouteChangeListenerCallback (void *inUserData, AudioSessionPropertyID inPropertyID, UInt32 inPropertyValueS, const void *inPropertyValue)

{

if (inPropertyID != kAudioSessionProperty_AudioRouteChange)

return;



// Determines the reason for the route change, to ensure that it is not

// because of a category change.

CFDictionaryRef routeChangeDictionary = (CFDictionaryRef)inPropertyValue;



CFNumberRef routeChangeReasonRef = (CFNumberRef)CFDictionaryGetValue (routeChangeDictionary, CFSTR (kAudioSession_AudioRouteChangeKey_Reason));



SInt32 routeChangeReason;



CFNumberGetValue (routeChangeReasonRef, kCFNumberSInt32Type, &routeChangeReason);

NSLog(@<<

NSLog(@[=======%@,inUserData);



AudioManager *pMgr = (__bridge AudioManager *)inUserData;

//沒有耳機

if (routeChangeReason == kAudioSessionRouteChangeReason_OldDeviceUnavailable)

{

[pMgr setSpeakerOn];

[pMgr resetOutputTarget];

}

else if (routeChangeReason == kAudioSessionRouteChangeReason_NewDeviceAvailable)

{

[pMgr erjiOutPutTarget];

}else if (routeChangeReason == kAudioSessionRouteChangeReason_Override){

[pMgr setSpeakerOn];

[pMgr resetOutputTarget];

}

NSLog(@-------->%f,IOSVersion);

//if (IOSVersion >= 8.0) {

if (routeChangeReason==8) {

[pMgr hasHeadset];

}

//}

}



//- (BOOL)isAirplayActived

//{

// CFDictionaryRef currentRouteDescriptionDictionary = nil;

// UInt32 dataSize = sizeof(currentRouteDescriptionDictionary);

// AudioSessionGetProperty(kAudioSessionProperty_AudioRouteDescription, &dataSize, ¤tRouteDescriptionDictionary);

//

// BOOL airplayActived = NO;

// if (currentRouteDescriptionDictionary)

// {

// CFArrayRef outputs = CFDictionaryGetValue(currentRouteDescriptionDictionary, kAudioSession_AudioRouteKey_Outputs);

// if(outputs != NULL && CFArrayGetCount(outputs) > 0)

// {

// CFDictionaryRef currentOutput = CFArrayGetValueAtIndex(outputs, 0);

// //Get the output type (will show airplay / hdmi etc

// CFStringRef outputType = CFDictionaryGetValue(currentOutput, kAudioSession_AudioRouteKey_Type);

//

// airplayActived = (CFStringCompare(outputType, kAudioSessionOutputRoute_AirPlay, 0) == kCFCompareEqualTo);

// }

// CFRelease(currentRouteDescriptionDictionary);

// }

// return airplayActived;

//}



/*

- (void)openloudspeaker{

//初始化播放器的時候如下設置

UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;

AudioSessionSetProperty(kAudioSessionProperty_AudioCategory,

sizeof(sessionCategory),

&sessionCategory);



UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;

AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,

sizeof (audioRouteOverride),

&audioRouteOverride);



AVAudioSession *audioSession = [AVAudioSession sharedInstance];

//默認情況下揚聲器播放

[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

[audioSession setActive:YES error:nil];

[self handleNotification:YES];



}

#pragma mark - 監聽聽筒or揚聲器

- (void) handleNotification:(BOOL)state

{

[[UIDevice currentDevice] setProximityMonitoringEnabled:state]; //建議在播放之前設置yes，播放結束設置NO，這個功能是開啟紅外感應



if(state)//添加監聽

[[NSNotificationCenter defaultCenter] addObserver:self

selector:@selector(sensorStateChange:) name:@UIDeviceProximityStateDidChangeNotification

object:nil];

else//移除監聽

[[NSNotificationCenter defaultCenter] removeObserver:self name:@UIDeviceProximityStateDidChangeNotification object:nil];

}



//處理監聽觸發事件

-(void)sensorStateChange:(NSNotificationCenter *)notification;

{

//如果此時手機靠近面部放在耳朵旁，那麼聲音將通過聽筒輸出，並將屏幕變暗（省電啊）

if ([[UIDevice currentDevice] proximityState] == YES)

{

NSLog(@Device is close to user);

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];

}

else

{

NSLog(@Device is not close to user);

[[AVAudioSession sharedInstance] setCategory:AVAudioSessionCategoryPlayback error:nil];

}

}

*/

@end