废话不多说说一下现状

网上好多关于扬声器的操作，可是问题多多。SDK7.X 和SDK7.X以上版本号有点诧异

#import <Foundation/Foundation.h>

#import <AudioToolbox/AudioToolbox.h>

#import <AVFoundation/AVFoundation.h>

@interface AudioManager : NSObject

{

AVAudioPlayer *m_audioPlayer;

}

@property (atomic, readonly)BOOL _isSpeakerOn;

@property (atomic, readonly)BOOL _isHeadsetOn;

+(AudioManager*)shared;

// 打开扬声器

- (void)setSpeakerOn;

// 关闭扬声器

- (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 <UIKit/UIKit.h>

#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];

//默认情况下扬声器播放

[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;

}

// 推断麦克风是否实用

- (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(@"<<<RouteChangeReason: %d",(int)routeChangeReason);

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

AudioManager *pMgr = (__bridge AudioManager *)inUserData;

//没有耳机

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, &currentRouteDescriptionDictionary);

//

//    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{

//初始化播放器的时候例如以下设置

UInt32 sessionCategory = kAudioSessionCategory_MediaPlayback;

AudioSessionSetProperty(kAudioSessionProperty_AudioCategory,

sizeof(sessionCategory),

&sessionCategory);

UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;

AudioSessionSetProperty (kAudioSessionProperty_OverrideAudioRoute,

sizeof (audioRouteOverride),

&audioRouteOverride);

AVAudioSession *audioSession = [AVAudioSession sharedInstance];

//默认情况下扬声器播放

[audioSession setCategory:AVAudioSessionCategoryPlayback error:nil];

[audioSession setActive:YES error:nil];

[self handleNotification:YES];

}

#pragma mark - 监听听筒or扬声器

- (void) handleNotification:(BOOL)state

{

[[UIDevice currentDevice] setProximityMonitoringEnabled:state]; //建议在播放之前设置yes。播放结束设置NO，这个功能是开启红外感应

if(state)//加入监听

[[NSNotificationCenter defaultCenter] addObserver:self

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

object:nil];

else//移除监听

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

}

//处理监听触发事件

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

{

//假设此时手机靠近面部放在耳朵旁，那么声音将通过听筒输出，并将屏幕变暗（省电啊）

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