ios - AVSpeechSynthesizer-使用AVSpeechBoundaryImmediate时不会停止

我有两个视图控制器。一和二。

在oneViewController上，有一个使用Storyboard调用TwoViewController的按钮-可以正常工作

在TwoViewController上有一个按钮，可以使用按钮(“监听”按钮)读取一些文本-可以正常工作

在TwoViewController上有Back按钮，可将您带回到oneViewController。

问题:

如果单击两次“收听”按钮并按下“返回”按钮，则视图控制器将从“二”变为“一”，但是语音仍在后台进行。有人可以帮忙停止讲话吗？

在TwoViewController上的代码:

AVSpeechSynthesizer *合成器；

-(IBAction) Back:(id)sender
{
    [_synth stopSpeakingAtBoundary: AVSpeechBoundaryImmediate]; --not working
    [self dismissViewControllerAnimated:YES completion:nil]; - working fine.
}

-(void) viewDidDisappear:(BOOL)animated
{
    [_synth stopSpeakingAtBoundary:AVSpeechBoundaryImmediate]; --not working
    [self dismissViewControllerAnimated:YES completion:nil];
}

-(IBAction)listenButton:(id)sender
{
    AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:@"I am running a test."];
    [utterance setRate:0.18f];
    _synth=[[AVSpeechSynthesizer alloc] init];
    [_synth speakUtterance:utterance];

}

注意:如果单击一次“监听”按钮，然后单击“返回”按钮，则不会发生此问题。仅当多次单击“侦听”按钮然后单击“后退”按钮时，才会发生问题。

最佳答案

尝试此以暂停，恢复和停止选项

-(void)stopSpeechReading
{
    if([synthesize isSpeaking]) {
        NSLog(@"Reading has been stopped");
        [synthesize stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];
        AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:@""];
        [synthesize speakUtterance:utterance];
        [synthesize stopSpeakingAtBoundary:AVSpeechBoundaryImmediate];
    }
}

-(void)pauseSpeechReading
{
    if([synthesize isSpeaking]) {
        NSLog(@"Reading paused");
        [synthesize pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];
        AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:@""];
        [synthesize speakUtterance:utterance];
        [synthesize pauseSpeakingAtBoundary:AVSpeechBoundaryImmediate];
    }
}

-(void)resumeSpeechReading
{
     NSLog(@"Reading resumed");
    [synthesize continueSpeaking];
}

关于ios - AVSpeechSynthesizer-使用AVSpeechBoundaryImmediate时不会停止，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/25457297/