ios 如何在不使用 AudioSessionSetProperty 的情况下将音频路由到扬声器？
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How Do I Route Audio to Speaker without using AudioSessionSetProperty?
提问by Jim Hankins
As AudioSessionSetPropertymay become deprecated, I'm trying to find an code example of how to route audio to the speakerusing other means.
作为AudioSessionSetProperty有可能成为deprecated，我试图找到如何将音频路由到一个代码示例speaker使用其他手段。
Previously I did the following:
以前我做了以下事情：
-(void)setSpeakerEnabled
{
debugLog(@"%s",__FUNCTION__);
UInt32 audioRouteOverride = kAudioSessionOverrideAudioRoute_Speaker;
AudioSessionSetProperty (
kAudioSessionProperty_OverrideAudioRoute,
sizeof (audioRouteOverride),
&audioRouteOverride
);
}
Trying to get same result but without callto AudioSessionSetProperty.
试图获得相同的结果，但without call要AudioSessionSetProperty.
回答by foundry
On each release of iOS, more of the audioSession properties are migrated to AVFoundation, so you should use those in preference whenever available.
在 iOS 的每个版本中，更多的 audioSession 属性都迁移到了 AVFoundation，因此您应该在可用时优先使用这些属性。
Since iOS 6 kAudioSessionProperty_OverrideAudioRouteis represented in AVAudioSession by the method
由于 iOS 6kAudioSessionProperty_OverrideAudioRoute在 AVAudioSession 中由方法表示
- (BOOL)overrideOutputAudioPort:error:
Available values are AVAudioSessionPortOverrideNoneand AVAudioSessionPortOverrideSpeaker
可用值是AVAudioSessionPortOverrideNone和AVAudioSessionPortOverrideSpeaker
Here is an example audio session configured entirely via AVFoundation:
这是一个完全通过 AVFoundation 配置的音频会话示例：
- (void)configureAVAudioSession
{
// Get your app's audioSession singleton object
AVAudioSession *session = [AVAudioSession sharedInstance];
// Error handling
BOOL success;
NSError *error;
// set the audioSession category.
// Needs to be Record or PlayAndRecord to use audioRouteOverride:
success = [session setCategory:AVAudioSessionCategoryPlayAndRecord
error:&error];
if (!success) {
NSLog(@"AVAudioSession error setting category:%@",error);
}
// Set the audioSession override
success = [session overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker
error:&error];
if (!success) {
NSLog(@"AVAudioSession error overrideOutputAudioPort:%@",error);
}
// Activate the audio session
success = [session setActive:YES error:&error];
if (!success) {
NSLog(@"AVAudioSession error activating: %@",error);
}
else {
NSLog(@"AudioSession active");
}
}
UPDATE
更新
Since iOS 7.0, the Audio Session Services C API is now fully deprecated in favour of AVAudioSession.
自 iOS 7.0 起，Audio Session Services C API 现在已完全弃用，取而代之的是 AVAudioSession。
UPDATE 2
更新 2
- (BOOL)overrideOutputAudioPort:error:
is a method, not a property, and it sets an underlying write-onlyUInt32 value. You can't get the current value, and you should treat the method as setting a temporary state. If the audio route changes or is interrupted, the property resets to its default (AVAudioSessionPortOverrideNone). You can get interruption notifications via AVAudioSessionDelegate.
是一个方法，而不是一个属性，它设置了一个底层只写UInt32 值。您无法获取当前值，您应该将该方法视为设置临时状态。如果音频路由更改或中断，该属性将重置为其默认值 ( AVAudioSessionPortOverrideNone)。您可以通过 获取中断通知AVAudioSessionDelegate。
回答by Yunus Nedim Mehel
NSError *error;
[[AVAudioSession sharedInstance] overrideOutputAudioPort:AVAudioSessionPortOverrideSpeaker
error:&error];
if(error)
{
NSLog(@"Error: AudioSession cannot use speakers");
}
回答by Mirac Bektas
let audioSession = AVAudioSession.sharedInstance()
do {
try audioSession.setCategory(AVAudioSession.Category.playAndRecord, mode: .spokenAudio, options: .defaultToSpeaker)
try audioSession.setActive(true, options: .notifyOthersOnDeactivation)
} catch {
print("error.")
}
// paste this code in your viewLoad region
// 将此代码粘贴到您的 viewLoad 区域中
回答by Greg
Foundry's solution together with this blogby Mario Diana has also allowed me to upgrade audio session set up code deprecated in iOS 7. My old code was based on AudioBufferPlayerby Matthijs Hollemans. Remember to add the AVFoundation.framework.
Foundry 的解决方案以及Mario Diana 的这篇博客也让我能够升级 iOS 7 中弃用的音频会话设置代码。我的旧代码基于 Matthijs Hollemans 的AudioBufferPlayer。记得添加 AVFoundation.framework。
