Question

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 - 工作正常
在TwoViewController上有一个按钮，使用按钮（Listen Button）读取一些文本 - 工作正常
TwoViewController上有Back按钮，可以将你带回oneViewController。

问题：

如果单击“监听”按钮两次并按下“返回”按钮，则视图控制器从“二”变为“一”，但语音仍在后台进行。有人可以帮助阻止演讲吗？

TwoViewController上的代码：

AVSpeechSynthesizer * synth;

-(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“监听”按钮一次，然后单击“后退”按钮，则不会发生此问题。只有在多次单击“监听”按钮并单击“后退”按钮时才会出现问题。

Answer 1

尝试暂停，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];
}

AVSpeechSynthesizer - 使用AVSpeechBoundaryImmediate时不会停止

1 个答案: