http://eureka.ykyuen.info/2010/06/02/iphone-configuring-the-avaudiosession-and-output-audio-to-iphone-speaker/
I am working on the AVAudioRecorder and AVAudioPlayer.
By default, the output audio is routed to the receiver instead
of the iPhone
speaker. In order to fulfill my requirement, i have to configure the AVAudioSession in
the AppDelegate.
There are 2 ways to route the audio output to speaker.
-
Overriding
the output audio route
-
Changing
the default output audio route (iPhone
OS 3.1 or above)
If
you only overriding the output audio route, the audio output will revert to the receiver instead of the speaker when u plugging in and then unplugging the headset. Therefore, it’d be better to change the default output audio route. but please
note that it only support iPhone
OS 3.1 or above.
Here comes to the codes.
1. Load the AVFoundation and AVToolbox frameworks
into your Xcode project.
2. Import the header file in the AppDelegate.h
1 |
#import
<AVFoundation/AVFoundation.h> |
2 |
#import
<AudioToolbox/AudioToolbox.h> |
3. Add the following code in applicationDidFinishLaunching method
in AppDelegate.m
02 |
NSError *sessionError
= nil ; |
03 |
[[AVAudioSession
sharedInstance] setDelegate: self ]; |
04 |
[[AVAudioSession
sharedInstance] setCategory:AVAudioSessionCategoryPlayAndRecord error:&sessionError]; |
12 |
UInt32
doChangeDefaultRoute = 1; |
13 |
AudioSessionSetProperty(kAudioSessionProperty_OverrideCategoryDefaultToSpeaker, sizeof (doChangeDefaultRoute),
&doChangeDefaultRoute); |
Then u can try the playback with the AVAudioPlayer
Done =)
Reference: Audio
Session Cookbook – Redirecting Output Audio