ios - 如何在文本到语音合成过程中停止语音？

Question

我使用以下代码使用按钮初始化文本到语音合成。但有时用户可能希望在讲话中途停止语音。我可以知道是否有任何代码可以做到这一点。

谢谢

这是我的代码

@interface RMDemoStepViewController ()

@end

@implementation RMDemoStepViewController
- (void)viewDidLoad
{
    [super viewDidLoad];
    //Add Border to TextBox


    //Instantiate the object that will allow us to use text to speech
    self.speechSynthesizer = [[AVSpeechSynthesizer alloc] init];
    [self.speechSynthesizer setDelegate:self];

}
- (IBAction)speakButtonWasPressed:(id)sender{

    [self speakText:[self.textView text]];

}

- (void)speakText:(NSString *)toBeSpoken{

    AVSpeechUtterance *utt = [AVSpeechUtterance speechUtteranceWithString:toBeSpoken];
    utt.rate = [self.speedSlider value];
    [self.speechSynthesizer speakUtterance:utt];

}

- (IBAction)speechSpeedShouldChange:(id)sender
{
    UISlider *slider = (UISlider *)sender;
    NSInteger val = lround(slider.value);
    NSLog(@"%@",[NSString stringWithFormat:@"%ld",(long)val]);
}
@end

Answer 1

But sometimes users may want to stop the voice in the middle of the speech.

要停止语音，请向语音合成器发送 -stopSpeakingAtBoundary:留言:

[self.speechSynthesizer stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];

如果您希望语音继续到当前单词的末尾而不是立即停止，请使用 AVSpeechBoundaryWord 而不是 AVSpeechBoundaryImmediate。

您也可以pause speech而不是完全停止它。