环信集成指南

iOS如何实现语音转文字功能?

1.项目中添加权限

Privacy - Speech Recognition Usage Description : 需要语音识别权限才能实现语音转文字功能

2.添加头文件

#import <AVFoundation/AVFoundation.h>

#import<Speech/Speech.h>

3.实现语音转文字逻辑:

3.1 根据wav语音文件创建请求

    SFSpeechURLRecognitionRequest *recognitionRequest

    = [[SFSpeechURLRecognitionRequest alloc] initWithURL:[NSURL fileURLWithPath:wavFilePath]];

3.2 创建语言配置

    SFSpeechRecognizer *recongnizer



    = [[SFSpeechRecognizer alloc] initWithLocale:[[NSLocale alloc] initWithLocaleIdentifier:@"zh_CN"]];

3.2 根据请求和语言配置创建任务,同时设置代理<SFSpeechRecognitionTaskDelegate>对象为自己

    SFSpeechRecognitionTask *task =



    = [recongnizer recognitionTaskWithRequest:recognitionRequest delegate:self];

3.3 取消方法:

    [task cancel];

3.4 代理方法:

// Called for all recognitions, including non-final hypothesis

- (void)speechRecognitionTask:(SFSpeechRecognitionTask *)task didHypothesizeTranscription:(SFTranscription *)transcription{

    NSLog(@"转换中...");

}



// Called when recognition of all requested utterances is finished.

// If successfully is false, the error property of the task will contain error information

- (void)speechRecognitionTask:(SFSpeechRecognitionTask *)task didFinishSuccessfully:(BOOL)successfully{

    NSLog(@"转换完成 是否成功:%d",successfully);



}