[_iflyRecognizerView setParameter: @"iat" forKey:[IFlySpeechConstant IFLY_DOMAIN]];

    [_iflyRecognizerView setParameter: @"0" forKey:[IFlySpeechConstant ASR_PTT]];

    //设置结果数据格式，可设置为json，xml，plain，默认为json。

    [_iflyRecognizerView setParameter:@"plain" forKey:[IFlySpeechConstant RESULT_TYPE]];

    [_iflyRecognizerView start];