iOS系统语音播报.txt文本

释放双眼,带上耳机,听听看~!

本篇记录一下系统播放文本的功能。主要以代码+注释为展示方式。

 

#import "ViewController.h"
#import <AVFoundation/AVFoundation.h>
@interface ViewController ()<AVSpeechSynthesizerDelegate>
@property (nonatomic, strong) AVSpeechSynthesizer *synthesizer;
@property (nonatomic, strong) UIButton *button1;
@property (nonatomic, strong) UIButton *button2;
@property (nonatomic, strong) UILabel *label;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
self.label = [[UILabel alloc]initWithFrame:CGRectMake(10, 100, 400, 100)];
self.label.numberOfLines = 0;
self.label.textColor = [UIColor redColor];
self.label.backgroundColor = [UIColor lightGrayColor];
[self.view addSubview:self.label];
self.button1 = [UIButton buttonWithType:UIButtonTypeCustom];
[self.button1 addTarget:self action:@selector(startPlay:) forControlEvents:UIControlEventTouchUpInside];
self.button1.backgroundColor = [UIColor redColor];
[self.button1 setTitle:@"开始播放" forState:UIControlStateNormal];
self.button1.frame = CGRectMake(100, 200, 100, 100);
[self.view addSubview:self.button1];
self.button2 = [UIButton buttonWithType:UIButtonTypeCustom];
[self.button2 addTarget:self action:@selector(endPlay:) forControlEvents:UIControlEventTouchUpInside];
self.button2.backgroundColor = [UIColor purpleColor];
[self.button2 setTitle:@"结束播放" forState:UIControlStateNormal];
self.button2.frame = CGRectMake(100, 300, 100, 100);
[self.view addSubview:self.button2];
[self getTxtFileContent];
// Do any additional setup after loading the view.
}

⚠️:下面才是系统播放文本的重点代码

- (NSString *)getTxtFileContent {
// 获取txt文件中的文本内容
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"demo" ofType:@"txt"];
NSString *text = [NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:nil];
return text;
}
- (void)startPlay:(UIButton *)sender {
NSString *text = [self getTxtFileContent];
[self readingContentText:text];
}
- (void)endPlay:(UIButton *)sender {
if ([self.synthesizer isSpeaking]) {
[self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryWord];
}
}
- (void)readingContentText:(NSString *)text {
1.初始化播音器
if (!self.synthesizer) {
self.synthesizer = [[AVSpeechSynthesizer alloc]init];
self.synthesizer.delegate = self;
}
2.将需要朗读的文本合成语音
AVSpeechUtterance *utterance = [[AVSpeechUtterance alloc]initWithString:text];
/*
avspeech支持的语言种类包括:
"th-TH","pt-BR","sk-SK","fr-CA","ro-RO","no-NO","fi-FI","pl-PL","de-DE",
"nl-NL","id-ID","tr-TR","it-IT","pt-PT","fr-FR","ru-RU","es-MX","zh-HK",
中文(香港)粤语"sv-SE","hu-HU","zh-TW",中文(台湾)"es-ES","zh-CN",中文(普通话)
"nl-BE","en-GB",英语(英国)"ar-SA","ko-KR","cs-CZ","en-ZA","en-AU","da-DK",
"en-US",英语(美国)"en-IE","hi-IN","el-GR","ja-JP"
*/
3.播放中文
AVSpeechSynthesisVoice *voiceLanguage = [AVSpeechSynthesisVoice voiceWithLanguage:@"zh-CN"];
utterance.voice = voiceLanguage;
4.语速0.0f - 1.0f
utterance.rate = 0.5f;
5.播放音调 0.5f-2.0f
utterance.pitchMultiplier = 1.0f;
6.播放下一句的时候有 0.2s 延迟时间
utterance.postUtteranceDelay = 0.2f;
7.设置音量大小  0.0f-1.0f
utterance.volume = 0.1f;
8.播放合成语音
[self.synthesizer speakUtterance:utterance];
9.暂停播放合成语音
//    [self.synthesizer pauseSpeakingAtBoundary:AVSpeechBoundaryWord];
}

我们可以根据AVSpeechSynthesizerDelegate坚挺播放状态

#pragma mark - AVSpeechSynthesizerDelegate
// 开始播放
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didStartSpeechUtterance:(AVSpeechUtterance *)utterance {
NSLog(@"开始播放");
}
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didFinishSpeechUtterance:(AVSpeechUtterance *)utterance {
NSLog(@"完成播放");
}
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didPauseSpeechUtterance:(AVSpeechUtterance *)utterance {
NSLog(@"暂停播放");
}
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didContinueSpeechUtterance:(AVSpeechUtterance *)utterance {
NSLog(@"恢复播放");
}
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer didCancelSpeechUtterance:(AVSpeechUtterance *)utterance {
NSLog(@"取消播放");
}
- (void)speechSynthesizer:(AVSpeechSynthesizer *)synthesizer willSpeakRangeOfSpeechString:(NSRange)characterRange utterance:(AVSpeechUtterance *)utterance {
NSLog(@"将要播放某一段语音");
self.label.text = utterance.speechString;
}

这个功能以代码+注释为主。
demo地址:https://github.com/sisios/systemSpeechTextDemo.git

 

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