我一直致力于在 xamarin iOS Binding 项目中使用 OpenEars v2.03 iOS 框架项目。让我解释一下我到目前为止所做的事情。我是 XCode、Xamarin 和所有这些 Binding 的新手。这将是一个大问题，所以请屏住呼吸……</p>
1) 在 Xcode for Simulator 中构建 OpenEars 框架项目。从Framework/OpenEars.framework/Versions/Current/复制“OpenEars”文件并重命名为“<strong>libOpenEars-i386.a”</p>
同样，通过将设备连接到 Mac 并为我的 iPhone 选择目标，为 iPhone 4s 设备构建相同的库。最后复制生成的OpenEars，重命名为“<strong>libOpenEars-armv7.a”</p>
2) 使用lipo命令将两个文件（libOpenEars-i386.a、libOpenEars-armv7.a）捆绑到一个文件“libOpenEars.a”，使用以下命令。
lipo -create -output libOpenEars.a libOpenEars-i386.a libOpenEars-armv7.a
3) 在 Xamarin Studio 中创建一个 Binding 项目并添加 libOpenEars.a，它会自动生成一个libOpenEars.linkwith.cs。下面是下面的代码，
using System;
using ObjCRuntime;
[assembly: LinkWith ("libOpenEars.a", LinkTarget.ArmV7 | LinkTarget.Simulator, SmartLink = true, ForceLoad = true, Frameworks="AudioToolbox AVFoundation", IsCxx=true, LinkerFlags = "-lstdc++")]
我尝试更改喜欢的标志 LinkerFlags = "-lstdc++ -lc++ -ObjC" 和 SmartLink=false。
4) 我的 ApiDefinition 文件包含了 OpenEars 的所有接口，我这里只添加了一个接口。
[BaseType(typeof(NSObject))]
[Protocol]
interface OEEventsObserver
{
[Wrap ("WeakDelegate")]
OEEventsObserverDelegate Delegate { get; set; }
[Export ("delegate", ArgumentSemantic.Assign), NullAllowed]
NSObject WeakDelegate { get; set; }
}
5) 将 OpenEars.dll 引用到我的 iOS 示例项目中。
6）在Binding库本身中添加语言模型和声学模型。（即使动态语言模型生成不需要它，我使用了这个OpenEars Xamarin git中的旧 OpenEars 示例项目，我没有使用新的 DynamicLanguageModel 生成器，但修改了示例以进行最新更改）。
视图控制器：
public partial class OpenEarsNewApiViewController : UIViewController
{
OEEventsObserver observer;
OEFliteController fliteController;
OEPocketsphinxController pocketSphinxController;
String pathToLanguageModel;
String pathToDictionary;
String pathToAcousticModel;
String firstVoiceToUse;
String secondVoiceToUse;
static bool UserInterfaceIdiomIsPhone {
get { return UIDevice.CurrentDevice.UserInterfaceIdiom == UIUserInterfaceIdiom.Phone; }
}
public void init()
{
try
{
observer = new OEEventsObserver();
observer.Delegate = new OpenEarsEventsObserverDelegate (this);
pocketSphinxController = new OEPocketsphinxController ();
fliteController = new OEFliteController();
firstVoiceToUse = "cmu_us_slt";
secondVoiceToUse = "cmu_us_rms";
pathToLanguageModel = NSBundle.MainBundle.ResourcePath + System.IO.Path.DirectorySeparatorChar + "OpenEars1.languagemodel";
pathToDictionary = NSBundle.MainBundle.ResourcePath + System.IO.Path.DirectorySeparatorChar + "OpenEars1.dic";
pathToAcousticModel = NSBundle.MainBundle.ResourcePath;
}
catch(Exception e) {
Console.WriteLine ("Exception Message :"+e.Message);
Console.WriteLine ("Inner Exception Mesage :"+e.InnerException.Message);
}
}
public OpenEarsNewApiViewController (IntPtr handle) : base (handle)
{
init ();
}
#region Update
public void UpdateStatus (String text)
{
txtStatus.Text = text;
}
public void UpdateText (String text)
{
txtOutput.Text = text;
}
public void UpdateButtonStates (bool hidden1, bool hidden2, bool hidden3, bool hidden4)
{
btnStartListening.Hidden = hidden1;
btnStopListening.Hidden = hidden2;
btnSuspend.Hidden = hidden3;
btnResume.Hidden = hidden4;
}
public void Say (String text)
{
//fliteController.SaywithVoice (text, secondVoiceToUse);
}
public void StartListening ()
{
//pocketSphinxController.RequestMicPermission ();
if (!pocketSphinxController.IsListening) {
//NSString *correctPathToMyLanguageModelFile = [NSString stringWithFormat:@"%@/TheNameIChoseForMyLanguageModelAndDictionaryFile.%@",[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0],@"DMP"];
pocketSphinxController.StartListeningWithLanguageModelAtPath (
pathToLanguageModel,
pathToDictionary,
pathToAcousticModel,
false
);
} else {
new UIAlertView ("Notify !!","Already Listening",null,"OK","Stop").Show();
}
}
public void StopListening ()
{
//pocketSphinxController.StopListening ();
}
public void SuspendRecognition ()
{
pocketSphinxController.SuspendRecognition ();
}
public void ResumeRecognition ()
{
pocketSphinxController.ResumeRecognition ();
}
#endregion
#region Event Handlers
partial void btnStartListening_TouchUpInside (UIButton sender)
{
try
{
StartListening();
//fliteController.Init();
//Console.WriteLine("Speech in Progress :"+fliteController.SpeechInProgress);
//fliteController.Say("Hai", new OEFliteVoice());
UpdateButtonStates (true, false, false, true);
Console.WriteLine("Speech in Progress :"+fliteController.SpeechInProgress);
}
catch(Exception e)
{
Console.WriteLine(e.Message);
}
}
partial void btnStopListening_TouchUpInside (UIButton sender)
{
StopListening ();
UpdateButtonStates (false, true, true, true);
}
partial void btnSuspend_TouchUpInside (UIButton sender)
{
SuspendRecognition ();
UpdateButtonStates (true, false, true, false);
}
partial void btnResume_TouchUpInside (UIButton sender)
{
ResumeRecognition ();
UpdateButtonStates (true, false, false, true);
}
}
<strong>OpenEarsEventsObserverDelegate：
// nothing much here just to check the status and debugging
public class OpenEarsEventsObserverDelegate:OEEventsObserverDelegate
{
OpenEarsNewApiViewController _controller;
public OpenEarsNewApiViewController controller {
get {
return _controller;
}
set {
_controller = value;
}
}
public OpenEarsEventsObserverDelegate (OpenEarsNewApiViewController ctrl)
{
controller = ctrl;
}
public override void PocketsphinxRecognitionLoopDidStart()
{
//base.PocketsphinxRecognitionLoopDidStart();
Console.WriteLine ("Pocketsphinx is starting up");
controller.UpdateStatus ("Pocketsphinx is starting up");
}
public override void PocketsphinxDidReceiveHypothesis (Foundation.NSString hypothesis, Foundation.NSString recognitionScore, Foundation.NSString utteranceID)
{
controller.UpdateText ("Heard: " + hypothesis);
controller.Say ("You said: " + hypothesis);
}
public override void PocketSphinxContinuousSetupDidFail ()
{
}
public override void PocketsphinxDidCompleteCalibration ()
{
Console.WriteLine ("Pocket calibration is complete");
controller.UpdateStatus ("Pocket calibratio is complete");
}
public override void PocketsphinxDidDetectSpeech ()
{
}
public override void PocketsphinxDidStartListening ()
{
Console.WriteLine ("Pocketsphinx is now listening");
controller.UpdateStatus ("Pocketphinx is now listening");
controller.UpdateButtonStates (true, false, false, true);
}
public override void PocketsphinxDidStopListening ()
{
}
public override void PocketsphinxDidStartCalibration ()
{
Console.WriteLine ("Pocketsphinx calibration has started.");
controller.UpdateStatus ("Pocketsphinx calibration has started");
}
public override void PocketsphinxDidResumeRecognition ()
{
}
public override void PocketsphinxDidSuspendRecognition ()
{
}
public override void PocketsphinxDidDetectFinishedSpeech ()
{
}
public override void FliteDidStartSpeaking ()
{
}
public override void FliteDidFinishSpeaking ()
{
}
}
这在 iOS 模拟器上完美运行，但不能在真实设备上运行。
我在设备上运行时收到此错误消息。所有接口都收到相同的消息。
Exception Message :Wrapper type 'OpenEars.OEEventsObserver' is missing its native ObjectiveC class 'OEEventsObserver'.
2015-05-15 12:55:26.996 OpenEarsNewApi[1359:231264] Unhandled managed exception: Exception has been thrown by the target of an invocation. (System.Reflection.TargetInvocationException)
at System.Reflection.MonoCMethod.InternalInvoke (System.Object obj, System.Object[] parameters) [0x00016] in /Developer/MonoTouch/Source/mono/mcs/class/corlib/System.Reflection/MonoMethod.cs:543
我是否缺少与设备绑定相关的任何内容？
我也尝试使用 make 文件构建相同的 .dll，但得到了相同的错误消息。
构建 OpenEars 框架：
xcodebuild -project OpenEars.xcodeproj -target OpenEars -sdk iphonesimulator8.2 -arch i386 -configuration Release clean build
xcodebuild -project OpenEars.xcodeproj -target OpenEars -sdk iphoneos -arch armv7 -configuration Release clean build
生成 OpenEars.dll 的 MAKE 文件
BTOUCH=/Developer/MonoTouch/usr/bin/btouch-native
all: OpenEars.dll
OpenEars.dll: AssemblyInfo.cs OpenEars.cs libOpenEars.a
$(BTOUCH) -unsafe --new-style -out:$@ OpenEars.cs -x=AssemblyInfo.cs --link-with=libOpenEars.a,libOpenEars.a
clean:
-rm -f *.dll
在此处查看完整的 mtouch错误日志
$lipo -info libOpenEars.a
Architectures in the fat file: libOpenEars.a are: i386 armv7
检查 $nm -arch armv7 libOpenEars.a
检查模拟器中存在的 OEEvent (i386)
$ nm -arch i386 libOpenEars.a | grep OEEvent
输出
U _OBJC_CLASS_$_OEEventsObserver
00006aa0 S l_OBJC_LABEL_PROTOCOL_$_OEEventsObserverDelegate
000076f0 S l_OBJC_PROTOCOL_$_OEEventsObserverDelegate
warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: no name list
libOpenEars.a(OEEventsObserver.o):
00002174 S _OBJC_CLASS_$_OEEventsObserver
00002170 S _OBJC_IVAR_$_OEEventsObserver._delegate
00002188 S _OBJC_METACLASS_$_OEEventsObserver
U _OBJC_CLASS_$_OEEventsObserver
00002d90 S l_OBJC_LABEL_PROTOCOL_$_OEEventsObserverDelegate
000035a0 S l_OBJC_PROTOCOL_$_OEEventsObserverDelegate
检查了 OEEvent 存在于 armv7
$nm -arch armv7 libOpenEars.a | grep OEEvent
输出
U _OBJC_CLASS_$_OEEventsObserver
00005680 S l_OBJC_LABEL_PROTOCOL_$_OEEventsObserverDelegate
000062d8 S l_OBJC_PROTOCOL_$_OEEventsObserverDelegate
warning: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/nm: no name list
libOpenEars.a(OEEventsObserver.o):
00001cb4 S _OBJC_CLASS_$_OEEventsObserver
00001cb0 S _OBJC_IVAR_$_OEEventsObserver._delegate
00001cc8 S _OBJC_METACLASS_$_OEEventsObserver
U _OBJC_CLASS_$_OEEventsObserver
00002638 S l_OBJC_LABEL_PROTOCOL_$_OEEventsObserverDelegate
00002e50 S l_OBJC_PROTOCOL_$_OEEventsObserverDelegate
我不确定我错过了什么。是的，有很多语法错误，我感谢您花时间阅读本文。