iOS语音

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<span style="white-space:pre">    </span>语音技术近来可是出遍了风头，从iphone4s的siri，到微信的语音聊天等等，极大地方便了人们的社交生活，也体现了当今移动科技发展的迅猛。当然，作为一位移动开发的从业人员怎能落伍呢！今天我们就来简单的实现一下语音聊天的功能。

<span style="white-space:pre">    </span>这次Demo使用的是Speex对录制的声音进行语音压缩，并且进行ogg的封装。由于本人水平有限，尝试了几次对ogg库的编译都不成功，于是终于在Code4App上找到了一个Demo,把它的speex和封装好的ogg拿了过来，如果大家对ios支持的语音格式不太了解的话可以看一下这篇文章：http://www.csdn.net/article/2012-03-16/313194

首先上图，聊天界面：

源码如下：

聊天界面头文件：

#import <UIKit/UIKit.h>
#import "RecorderManager.h"
#import "PlayerManager.h"

@interface MainViewController : UIViewController<UITableViewDataSource, UITableViewDelegate, RecordingDelegate, PlayingDelegate, UIGestureRecognizerDelegate>

- (IBAction)talk:(id)sender;

@property (strong, nonatomic) IBOutlet UITableView *vTableView;

@property (strong, nonatomic) IBOutlet UIButton *speekBtb;

@property (assign) BOOL isSpeak;

@property (strong, nonatomic) NSMutableArray *voiceArray;

@property (strong, nonatomic) NSString *fileName;

@property (assign) BOOL isPlaying;

@end

实现：

#import "MainViewController.h"

@interface MainViewController()

@end

@implementation MainViewController
@synthesize isSpeak = _isSpeak;
@synthesize voiceArray = _voiceArray;
@synthesize fileName = _fileName;
@synthesize isPlaying = _isPlaying;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.

    self.vTableView.delegate = self;
    self.voiceArray = [[NSMutableArray alloc] init];

    UILongPressGestureRecognizer *guesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handSpeakBtnPressed:)];
    guesture.delegate = self;
    guesture.minimumPressDuration = 0.01f;

    //录音按钮添加手势操作
    [_speekBtb addGestureRecognizer:guesture];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark tableView+++++++++++++++++++++++++++++++++++++++
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
    return 1;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];

    //cell选中属性修改为无
    [cell setSelectionStyle:UITableViewCellSelectionStyleNone];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    static NSString *identifid = @"simpleCell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifid];
    if(!cell){
        cell = [[UITableViewCell alloc] init];
    }

    NSMutableDictionary *dic = [self.voiceArray objectAtIndex:indexPath.row];

    //加载聊天内容
    UIButton *chatView = [dic objectForKey:@"view"];
    if([[dic objectForKey:@"from"] isEqualToString:@"SELF"]){
        //添加录音时长显示
        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(120, 25, 30, 30)];
        int time = [[dic objectForKey:@"time"] intValue];
        [label setText:[NSString stringWithFormat:@"%d'", time]];
        [cell addSubview:label];

        //添加头像
        float offset = (chatView.frame.size.height - 48)>0?(chatView.frame.size.height - 48)/2:10;
        UIImageView *headIcon = [[UIImageView alloc] initWithFrame:CGRectMake(self.view.frame.size.width - 48 -5, offset, 48, 48)];
        [headIcon setImage:[UIImage imageNamed:@"h2.jpg"]];
        [cell addSubview:headIcon];
        [chatView setTitle:@"点击播放" forState:UIControlStateNormal];

        chatView.tag = 100 + indexPath.row;
        [chatView addTarget:self action:@selector(playVoice:) forControlEvents:UIControlEventTouchUpInside];

    }else if([[dic objectForKey:@"from"] isEqualToString:@"OTHER"]){
        //系统自动回复部分
        float offset = (chatView.frame.size.height - 48)>0?(chatView.frame.size.height - 48)/2:10;
        UIImageView *headIcon = [[UIImageView alloc] initWithFrame:CGRectMake(5, offset, 48, 48)];
        [headIcon setImage:[UIImage imageNamed:@"h1.jpg"]];
        [cell addSubview:headIcon];
        [chatView setTitle:@"hello world" forState:UIControlStateNormal];
    }

    [cell addSubview:chatView];

    return cell;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return [_voiceArray count];
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    UIView *chatView = [[_voiceArray objectAtIndex:[indexPath row]] objectForKey:@"view"];
    return chatView.frame.size.height+30;
}

//添加手势操作，长按按钮
- (void)handSpeakBtnPressed:(UILongPressGestureRecognizer *)gestureRecognizer {
    if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
        NSLog(@"UIGestureRecognizerStateBegan");

        [self.speekBtb setTitle:@"松开结束" forState:UIControlStateNormal];
        [self talk:nil];
    }
    if (gestureRecognizer.state == UIGestureRecognizerStateChanged) {
        NSLog(@"UIGestureRecognizerStateChanged");
    }

    if (gestureRecognizer.state == UIGestureRecognizerStateEnded) {
        NSLog(@"UIGestureRecognizerStateEnded");

        [self.speekBtb setTitle:@"按住说话" forState:UIControlStateNormal];
        [self stopRecordVoice];
    }
}

//开始录音
- (IBAction)talk:(id)sender {
    //若正在播放则立即返回
    if(self.isPlaying){
        return;
    }

    if(!self.isSpeak){
        self.isSpeak = YES;
        [RecorderManager sharedManager].delegate = self;
        [[RecorderManager sharedManager] startRecording];
    }
}

//结束录音
- (void)stopRecordVoice{
    self.isSpeak = NO;
    [[RecorderManager sharedManager] stopRecording];
}

//播放录音
- (void)playVoice:(id)sender{
    if(self.isSpeak){
        return;
    }

    if(!self.isPlaying){
        UIButton *btn = (UIButton *)sender;
        NSInteger index = btn.tag;

        NSMutableDictionary *dic = [_voiceArray objectAtIndex:(index - 100)];
        self.fileName = [dic objectForKey:@"voice"];

        [PlayerManager sharedManager].delegate = nil;

        self.isPlaying = YES;
        [[PlayerManager sharedManager] playAudioWithFileName:self.fileName delegate:self];
    }else{
        self.isPlaying = NO;
        [[PlayerManager sharedManager] stopPlaying];
    }
}

- (void)recordingFinishedWithFileName:(NSString *)filePath time:(NSTimeInterval)interval{
    //录音保存的文件地址
    self.fileName = filePath;
    UIButton *view = [self bubbleView:@"点击播放" from:YES];
    //时长
    NSNumber *num = [[NSNumber alloc] initWithDouble:interval];

    NSMutableDictionary *dic = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"SELF", @"from", view, @"view", self.fileName, @"voice", num, @"time", nil nil];
    [self.voiceArray addObject:dic];

    //系统默认回复消息
    UIButton *otherView = [self bubbleView:@"你好!" from:NO];
    NSMutableDictionary *m_dic = [[NSMutableDictionary alloc]initWithObjectsAndKeys:@"OTHER", @"from", otherView, @"view", @"", @"voice", 0, @"time",nil];

    [self.voiceArray addObject:m_dic];

    [_vTableView reloadData];
}

//超时操作
- (void)recordingTimeout{
    self.isSpeak = NO;
}

//录音机停止采集声音
- (void)recordingStopped{
    self.isSpeak = NO;
}

//录制失败操作
- (void)recordingFailed:(NSString *)failureInfoString{
    self.isSpeak = NO;
}

//播放停止
- (void)playingStoped{
    self.isPlaying = NO;
}

//聊天气泡按钮生成
- (UIButton*)bubbleView:(NSString *)message from:(BOOL)isFromSelf
{
    UIView *returnView = [self assembleMessageAtIndex:message from:isFromSelf];
    UIButton *cellView = [[UIButton alloc] initWithFrame:CGRectZero];
    cellView.backgroundColor = [UIColor clearColor];
    [returnView setBackgroundColor:[UIColor clearColor]];

    NSString *picName = [NSString stringWithFormat:@"%@.png", isFromSelf?@"bubble2":@"bubble1"];
    UIImage *bubble = [UIImage imageNamed:picName];

    UIImageView *bubbleView = [[UIImageView alloc] initWithImage:[bubble stretchableImageWithLeftCapWidth:35 topCapHeight:3]];
    if(isFromSelf)
    {
        returnView.frame = CGRectMake(9.0f, 20.0f, returnView.frame.size.width, returnView.frame.size.height);
        bubbleView.frame = CGRectMake(0.0f, 14.0f, returnView.frame.size.width+45.0f, returnView.frame.size.height + 20.0f);
        cellView.frame = CGRectMake(self.view.frame.size.width - bubbleView.frame.size.width - 60, 20.0f, bubbleView.frame.size.width, bubbleView.frame.size.height + 20.0f);
    }
    else
    {
        returnView.frame = CGRectMake(88.0f, 20.0f, returnView.frame.size.width, returnView.frame.size.height);
        bubbleView.frame = CGRectMake(55.0f, 14.0f, returnView.frame.size.width + 45.0f, returnView.frame.size.height + 20.0f);
        cellView.frame = CGRectMake(50.0f, 20.0f, bubbleView.frame.size.width + 50.0f, bubbleView.frame.size.height + 20.0f);
    }

    [cellView setBackgroundImage:bubble forState:UIControlStateNormal];
    [cellView setFont:[UIFont systemFontOfSize:13.0f]];
    return cellView;
}

#pragma mark -
#pragma mark assemble message at index
#define BUBBLEWIDTH 18
#define BUBBLEHEIGHT 18
#define MAX_WIDTH 140
- (UIView *)assembleMessageAtIndex:(NSString *)message from:(BOOL)fromself
{
    NSMutableArray  *array = [[NSMutableArray alloc] init];
    [self getImageRange:message _array:array];

    UIView *returnView = [[UIView alloc] initWithFrame:CGRectZero];
    CGFloat upX = 0;
    CGFloat upY = 0;
    CGFloat x = 0;
    CGFloat y = 0;

    if(array)
    {
        for(int i = 0; i < [array count]; i++)
        {
            NSString *msg = [array objectAtIndex:i];

            for (int index = 0; index < msg.length; index++)
            {
                NSString *m_ch = [msg substringWithRange:NSMakeRange(index, 1)];
                if(upX >= MAX_WIDTH)
                {
                    upY = upY + BUBBLEHEIGHT;
                    upX = 0;
                    x = 140;
                    y = upY;
                }

                UIFont *font = [UIFont systemFontOfSize:13.0f];
                CGSize m_size = [m_ch sizeWithFont:font constrainedToSize:CGSizeMake(140, 40)];
                UILabel *m_label = [[UILabel alloc] initWithFrame:CGRectMake(upX, upY, m_size.width, m_size.height)];
                [returnView addSubview:m_label];
                m_label.font = font;
                m_label.text = m_ch;
                m_label.backgroundColor = [UIColor clearColor];
                upX = upX+m_size.width;
                if(x < 140)
                {
                    x = upX;
                }
            }
        }
    }

    returnView.frame = CGRectMake(15.0f, 1.0f, x, y);
    return returnView;
}

- (void) getImageRange:(NSString *)message _array:(NSMutableArray *)array
{
    if(message != nil)
    {
        [array addObject: message];
    }
}


- (void)dealloc{

    [self removeObserver:self forKeyPath:@"isSpeak"];
    self.fileName = nil;
}

@end

好了一个简单的语音聊天程序就好了，是不是很简单，其中最重要的就是 RecorderManager以及PlayerManager两个类了，一个负责录音，一个负责播放，这两个类我准备放到下一篇博客中讲解一下，大家不妨通过去下载我的Demo自己动手试一试，下载地址：http://download.csdn.net/detail/shenjie12345678/8021263。

注意点：

1.在将Demo程序中的Classes以及Libs文件加入到工程中去的时候，请将echo_diagnostic.m文件以及以test开头的文件删掉，否则工程会报错。

2.在工程中将Preprocessor Macros选项中的内容删除。