标签：style io color os ar for sp div on
在ios6以前，我们有如下的方法：
#import<AVFoundation/AVFoundation.h>
[[AVAudioSession sharedInstance] setDelegate:self];
AudioSessionAddPropertyListener(kAudioSessionProperty_AudioRouteChange,audioRouteChangeListenerCallback, self);
然后实现该回调：//音频监控回调函数
static void audioRouteChangeListenerCallback (void *inUserData,
AudioSessionPropertyID inPropertyID,
UInt32 inPropertyValueSize,
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 = inPropertyValue;
CFNumberRef routeChangeReasonRef = CFDictionaryGetValue (routeChangeDictionary, CFSTR (kAudioSession_AudioRouteChangeKey_Reason));
SInt32 routeChangeReason;
CFNumberGetValue (routeChangeReasonRef, kCFNumberSInt32Type, &routeChangeReason);
// do your handling here
}
请注意[[AVAudioSession sharedInstance] setDelegate:self]一定不要遗漏，否则该回调应该无法触发。[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(outputDeviceChanged:) name:AVAudioSessionRouteChangeNotification object:[AVAudioSession sharedInstance]];
- (void)outputDeviceChanged:(NSNotification *)aNotification
{
// do your jobs here
}
请注意，addobserver的参数填写：其中的object必须是[AVAudioSession sharedInstance]，而不是我们通常很多情况下填写的nil，此处若为nil，通知也不会触发。ios监听输出设备变化（监听耳机插拔，蓝牙设备连接断开等）的实现
标签：style io color os ar for sp div on
原文地址：http://blog.csdn.net/openglnewbee/article/details/40619813
