AVSpeechUtterance最大音量真的很安静，速度真快 [英] AVSpeechUtterance maximum volume really quiet and rate really fast

问题描述

我在为我的应用程序添加语音提示并且正在测试iOS 7中的AVSpeechUtterance，但默认语音速率非常快。最低语速更容易理解。但是最大音量值1太安静了！我在iPhone 4上测试了它，音量一直在变高。有些东西一定是错的，否则怎么可以用呢。

I was toying with adding speech cues to my app and was testing out AVSpeechUtterance in iOS 7, but the default speech rate is REALLY fast. The minimum speech rate is much more understandable. But the maximum volume value of 1 is soooo quiet! I tested it on my iPhone 4 with the volume turned all the way up. Something must be wrong or else how would this be usuable at all.

AVSpeechSynthesizer *synthesizer = [[AVSpeechSynthesizer alloc]init];
            NSString *mystring = [NSString stringWithFormat:@"Talk String Here %@",myObject.name];
            AVSpeechUtterance *utterance = [AVSpeechUtterance speechUtteranceWithString:mystring];
            [utterance setRate:AVSpeechUtteranceMinimumSpeechRate];
            [utterance setVolume:1];
            [synthesizer speakUtterance:utterance];

推荐答案

这对我有用（Swift 3.0）

This worked for me ( Swift 3.0 )

let audioSession = AVAudioSession.sharedInstance()  
do {
  try audioSession.setCategory(AVAudioSessionCategoryPlayAndRecord, with: AVAudioSessionCategoryOptions.defaultToSpeaker)  
} catch {   
  print("audioSession properties weren't set because of an error.")   
}

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