ios AVSpeechSynthesizer 插件 phonegap pauseSpeakingAtBoundary 不工作

Question

我为 phonegap 制作了一个插件，允许用户使用 AVSpeechSynthesizer 听到一段文本，但我似乎无法让 pauseSpeakingAtBoundary 工作。

出于测试目的，它目前接收要合成的文本字符串或表示“PAUSE”的字符串，并仅检查 if (![echo isEqual:@'PAUSE']) 以确定它是否应该尝试暂停话语。说话开始并在收到“暂停”时记录，但合成器继续说话。

我对此完全陌生，所以我不确定是我犯了错误还是 pauseSpeakingAtBoudary 有问题。 我的代码如下。谢谢。

重申一下，我无法开始工作的原因是 pauseSpeakingAtBoundary。根据 phonegaps 文档，语音合成是通过 javascript exec 进行的。

//
//  Echo.h
//  Plugin
//
//
//
//

#import <Cordova/CDVPlugin.h>
#import <AVFoundation/AVFoundation.h>


@interface Echo : CDVPlugin <AVSpeechSynthesizerDelegate>


@property (strong, nonatomic) AVSpeechSynthesizer *synthesizer;

- (void) echo:(NSMutableArray*)arguments;



@end


//
//  Echo.m
//  Plugin
//
//
//
//

#import "Echo.h"

@implementation Echo



- (void)echo:(CDVInvokedUrlCommand*)command
{


    CDVPluginResult* pluginResult = nil;
    NSString* echo = [command.arguments objectAtIndex:0];

    AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc] init];

    synthesizer.delegate = self;

    if (echo != nil && [echo length] > 0 ) {

    pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:echo];

    if( ![echo  isEqual:@"PAUSE"]) {

        AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:echo];
        utterance.rate = 0.20;
        utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"en-gb"];
        [synthesizer speakUtterance:utterance];

    } else {


        NSLog(@"Pausing");

        [synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];


    }





} else {
    pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];
}

[self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
}


@end

Answer 1

我设法通过将 pauseSpeaking... 和 continueSpeaking 分成不同的函数并从 javascript exec 执行它们来让它工作。 Echo.m 应该是这样的:

//
//  Echo.m
//  Plugin
//
//
//
//

#import "Echo.h"

@implementation Echo





- (void)echo:(CDVInvokedUrlCommand*)command
{

self.synthesizer = [[AVSpeechSynthesizer alloc] init];
self.synthesizer.delegate = self;

CDVPluginResult* pluginResult = nil;
NSString* echo = [command.arguments objectAtIndex:0];


if (echo != nil && [echo length] > 0 ) {

    pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_OK messageAsString:echo];


        AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc] initWithString:echo];
        utterance.rate = 0.20;
        utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"en-gb"];
        [self.synthesizer speakUtterance:utterance];     


} else {
    pluginResult = [CDVPluginResult resultWithStatus:CDVCommandStatus_ERROR];
}

[self.commandDelegate sendPluginResult:pluginResult callbackId:command.callbackId];
}

-(void)speechSynthesizerPause:(AVSpeechSynthesizer *)synthesizer {

[self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];
NSLog(@"Pausing");

}

-(void)speechSynthesizerContinue:(AVSpeechSynthesizer *)synthesizer {

   [self.synthesizer continueSpeaking];
    NSLog(@"Continue");

}


-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance {
NSLog(@"Playback finished");
}


@end