IOS开发之使用Speex格式实现简单的语音聊天功能（一）

<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];
[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。