AVSpeechSynthesizer delegates are not calling in iOS 11

Question

Here is my code for text-to-speech. Everything is working fine below iOS 11. But in iOS 11 delegate methods are not being called.

AVSpeechSynthesizerDelegate is set accurately. (As it is working below iOS 11)

On button tap

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

AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:stringToSpeech];
[utterance setRate:AVSpeechUtteranceDefaultSpeechRate];
[utterance setPitchMultiplier:1];
[utterance setVolume:1];
utterance.voice = [AVSpeechSynthesisVoice voiceWithLanguage:@"en-US"];
[synthesizer speakUtterance:utterance];

These are delegate methods I have implemented.

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

-(void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance{
    NSLog(@"Started");
}

Did someone face this issue? Any help will be greatly appreciated.

I m testing on iOS 11.0.3, with Xcode 9.0

Answer 1

Your synthesizer object must be a property for that to work :).

Either make your AVSpeechSynthesizer instance, which is synthesizer like so:

@property (strong, nonatomic) AVSpeechSynthesizer *synthesizer;

or like this with readwrite.

@property (readwrite, strong, nonatomic) AVSpeechSynthesizer *synthesizer;

Let me know if this works.