avspeechsynthesized 文字播放声音

#import "THSpeechController.h"
#import <AVFoundation/AVFoundation.h>

@interface THSpeechController ()
@property (strong, nonatomic) AVSpeechSynthesizer *synthesizer;
@property (strong, nonatomic) NSArray *voices;
@property (strong, nonatomic) NSArray *speechStrings;
@end

@implementation THSpeechController

+ (instancetype)speechController {
    return [[self alloc] init];
}

- (id)init {
    self = [super init];
    if (self) {
        _synthesizer = [[AVSpeechSynthesizer alloc] init];

        _voices = @[[AVSpeechSynthesisVoice voiceWithLanguage:@"en-US"],
                    [AVSpeechSynthesisVoice voiceWithLanguage:@"en-GB"]];

        _speechStrings = [self buildSpeechStrings];
    }
    return self;
}

- (NSArray *)buildSpeechStrings {
    return @[@"Hello AV Foundation. How are you?",
             @"I'm well! Thanks for asking.",
             @"Are you excited about the book?",
             @"Very! I have always felt so misunderstood.",
             @"What's your favorite feature?",
             @"Oh, they're all my babies.  I couldn't possibly choose.",
             @"It was great to speak with you!",
             @"The pleasure was all mine!  Have fun!"];
}

- (void)beginConversation {
    for (NSUInteger i = 0; i < self.speechStrings.count; i++) {
        AVSpeechUtterance *utterance =
            [[AVSpeechUtterance alloc] initWithString:self.speechStrings[i]];
        utterance.voice = self.voices[i % 2];
        utterance.rate = 0.5f;
        utterance.pitchMultiplier = 0.8f;
        utterance.postUtteranceDelay = 0.1f;
        [self.synthesizer speakUtterance:utterance];
    }
}

@end

avaudioplayer   auaudiosession  

avaudiorecoder auaudiosettings