一、首先到科大讯飞官网注册账号(http://open.voicecloud.cn/),并创建应用获取appid,下载sdk文件

二、代码实现api调用
1.先用xcode(我这里使用的是xcode 5.1)新建好一个项目,然后在项目添加要用的类库。其中有一个是讯飞语音的类库iflyMSC,在下载的sdk文件里有,导入就行了。导入的时候要注意把iflyMSC类库拷贝到你的工程目录里,不然后果很严重!

2.导完类库之后,在建好的工程里添加好要用的头文件。
MainViewController.h
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#import <UIKit/UIKit.h>#import "iflyMSC/IFlySpeechSynthesizerDelegate.h" | 
MainViewController.m
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#import "MainViewController.h"#import <QuartzCore/QuartzCore.h>#import <AVFoundation/AVAudioSession.h>#import <AudioToolbox/AudioSession.h>#import "iflyMSC/IFlySpeechConstant.h"#import "iflyMSC/IFlySpeechUtility.h"#import "iflyMSC/IFlySpeechSynthesizer.h" | 
3.完成这些准备工作之后,接下来就是堆代码的工作了。为了方便,笔者只用了两个控件:一个UITextField、一个UIButton,然后给这两个控件分别做一个Outlet和Action连接。
MainViewController.h
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#import <UIKit/UIKit.h>#import "iflyMSC/IFlySpeechSynthesizerDelegate.h"//引入语音合成类@class IFlySpeechSynthesizer;@class IFlyDataUploader;//注意要添加语音合成代理@interface MainViewController : UIViewController<IFlySpeechSynthesizerDelegate>//声明语音合成的对象@property (nonatomic, strong) IFlySpeechSynthesizer *iFlySpeechSynthesizer;@property (strong, nonatomic) IBOutlet UITextField *content;- (IBAction)Start:(id)sender;@end | 
MainViewController.m
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#import "MainViewController.h"#import <QuartzCore/QuartzCore.h>#import <AVFoundation/AVAudioSession.h>#import <AudioToolbox/AudioSession.h>#import "iflyMSC/IFlySpeechConstant.h"#import "iflyMSC/IFlySpeechUtility.h"#import "iflyMSC/IFlySpeechSynthesizer.h"@interface MainViewController ()@end@implementation MainViewController- (void)viewDidLoad{    [super viewDidLoad];    //通过appid连接讯飞语音服务器,把@"53b5560a"换成你申请的appid    NSString *initString = [[NSString alloc] initWithFormat:@"appid=%@,timeout=%@",@"53b5560a",@"20000"];    //所有服务启动前,需要确保执行createUtility    [IFlySpeechUtility createUtility:initString];         //创建合成对象,为单例模式    _iFlySpeechSynthesizer = [IFlySpeechSynthesizer sharedInstance];    _iFlySpeechSynthesizer.delegate = self;    //设置语音合成的参数    //合成的语速,取值范围 0~100    [_iFlySpeechSynthesizer setParameter:@"50" forKey:[IFlySpeechConstant SPEED]];    //合成的音量;取值范围 0~100    [_iFlySpeechSynthesizer setParameter:@"50" forKey:[IFlySpeechConstant VOLUME]];    //发音人,默认为”xiaoyan”;可以设置的参数列表可参考个性化发音人列表    [_iFlySpeechSynthesizer setParameter:@"xiaoyan" forKey:[IFlySpeechConstant VOICE_NAME]];    //音频采样率,目前支持的采样率有 16000 和 8000    [_iFlySpeechSynthesizer setParameter:@"8000" forKey:[IFlySpeechConstant SAMPLE_RATE]];    ////asr_audio_path保存录音文件路径,如不再需要,设置value为nil表示取消,默认目录是documents    [_iFlySpeechSynthesizer setParameter:"tts.pcm" forKey:[IFlySpeechConstant TTS_AUDIO_PATH]];    //隐藏键盘,点击空白处    UITapGestureRecognizer *tapGr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTapped:)];    tapGr.cancelsTouchesInView = NO;    [self.view addGestureRecognizer:tapGr];  }-(void)viewTapped:(UITapGestureRecognizer*)tapGr{    [self.content resignFirstResponder];}- (void)didReceiveMemoryWarning{    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}- (IBAction)Start:(id)sender {    //启动合成会话    [_iFlySpeechSynthesizer startSpeaking:self.content.text];}#pragma mark - IFlySpeechSynthesizerDelegate//开始播放- (void) onSpeakBegin{     }//缓冲进度- (void) onBufferProgress:(int) progress message:(NSString *)msg{    NSLog(@"bufferProgress:%d,message:%@",progress,msg);}//播放进度- (void) onSpeakProgress:(int) progress{    NSLog(@"play progress:%d",progress);} //暂停播放- (void) onSpeakPaused{     }//恢复播放- (void) onSpeakResumed{     }//结束回调- (void) onCompleted:(IFlySpeechError *) error{     }@end | 
原文:http://www.cnblogs.com/jx66/p/5166536.html