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热更新介绍
什么是热更新？
游戏客户端启动时，主动请求服务端检查版本号，并更新资源到本地。
应用场景：
情况一：游戏客户端已经发布了，但突然发现有个比较严重的bug需要修复。这时需要更新游戏的代码（Lua代码）。
情况二：情人节到了，需要搞个活动，在游戏中营造一个节日氛围。这时，需要更新游戏资源或增加一些功能。
好处：不需要重新打包和提交应用到市场等待审核。
热更新流程
AssetsManager
在Cocos2d-x中已经封装了用于实现热更新功能的类，就是AssetsManager。
api说明：
// 检测是否有版本更新
virtual bool checkUpdate();
// 下载更新的资源包并解压到下载路径
virtual void update();
// 获取当前客户端版本号
std::string getVersion();
// 删除客户端版本号
void deleteVersion();
// 设置下载回调（AssetsManagerDelegateProtocol）
void setDelegate(AssetsManagerDelegateProtocol *delegate);
// 设置连接超时时间（单位：秒）
void setConnectionTimeout(unsigned int timeout);
// 设置从服务端下载资源包的url
void setPackageUrl(const char* packageUrl);
// 设置服务端获取版本号的url
void setVersionFileUrl(const char* versionFileUrl);
// 设置资源保存路径
void setStoragePath(const char* storagePath);
因为AssetsManager使用了pthread库，所以需要在win32工程中需要包含pthread库所在目录。
VS在工程属性——C/C++——常规——附加包含目录中添加：$(ProjectDir)......cocos2dxplatformthird_partywin32pthread
示例工程
该工程使用Cocos2d-x2.1.6和VS2012。【点击下载源码】
把工程放到引擎projects目录下即可。
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#include "UpdateLayer.h"
#include "HelloWorldScene.h"
#if (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32)
#include <dirent.h>
#include <sys/stat.h>
#endif
bool
UpdateLayer
::
init
(){
if
(
CCLayer
::
init
())
{
// 设置资源包下载目录
m_downloadDir
=
CCFileUtils
::
sharedFileUtils
()
->
getWritablePath
();
m_downloadDir
+=
"download"
;
// 添加资源包下载路径到搜索路径，优先搜索更新的资源
std
::
vector
<
std
::
string
>
searchPaths
=
CCFileUtils
::
sharedFileUtils
()
->
getSearchPaths
();
searchPaths
.
insert
(
searchPaths
.
begin
(),
m_downloadDir
);
CCFileUtils
::
sharedFileUtils
()
->
setSearchPaths
(
searchPaths
);
// 提示
m_label
=
CCLabelTTF
::
create
(
""
,
"Arial"
,
18
);
m_label
->
setAnchorPoint
(
ccp
(
1
,
0.5
));
m_label
->
setPosition
(
ccp
(
465
,
20
));
addChild
(
m_label
);
// 菜单
CCMenu
*
menu
=
CCMenu
::
create
();
menu
->
setPosition
(
CCPointZero
);
addChild
(
menu
);
CCSize
visibleSize
=
CCDirector
::
sharedDirector
()
->
getVisibleSize
();
// 重置
CCMenuItemFont
*
itemReset
=
CCMenuItemFont
::
create
(
"reset"
,
this
,
menu_selector
(
UpdateLayer
::
reset
));
itemReset
->
setPosition
(
ccp
(
visibleSize
.
width
/
2
,153)">50
));
menu
->
addChild
(
itemReset
);
// 获取当前版本号
CCMenuItemFont
*
itemGetClientVersion
=
CCMenuItemFont
::
create
(
"getClientVersion"
,
menu_selector
(
UpdateLayer
::
getClientVersion
));
itemGetClientVersion
->
setPosition
(
ccp
(
visibleSize
.
width
/
100
));
menu
->
addChild
(
itemGetClientVersion
);
// 获取服务器最新版本
CCMenuItemFont
*
itemGetServerVersion
=
CCMenuItemFont
::
create
(
"checkUpdate"
,
menu_selector
(
UpdateLayer
::
checkUpdate
));
itemGetServerVersion
->
setPosition
(
ccp
(
visibleSize
.
width
/
150
));
menu
->
addChild
(
itemGetServerVersion
);
// 更新版本
CCMenuItemFont
*
itemUpdateVersion
=
CCMenuItemFont
::
create
(
"updateVersion"
,
menu_selector
(
UpdateLayer
::
update
));
itemUpdateVersion
->
setPosition
(
ccp
(
visibleSize
.
width
/
200
));
menu
->
addChild
(
itemUpdateVersion
);
// 进入场景
CCMenuItemFont
*
itemEnterScene
=
CCMenuItemFont
::
create
(
"enterScene"
,
menu_selector
(
UpdateLayer
::
enterScene
));
itemEnterScene
->
setPosition
(
ccp
(
visibleSize
.
width
/
250
));
menu
->
addChild
(
itemEnterScene
);
return
true
;
}
false
;
}
AssetsManager
*
UpdateLayer
::
getAssetsManager
(){
static
AssetsManager
*
s_assetsManager
=
NULL
;
if
(
s_assetsManager
==
NULL
)
{
s_assetsManager
=
new
AssetsManager
(
"http://is.muni.cz/do/rect/el/ikony/sady/ikonky-128x128-png.zip"
,
"https://coding.net/u/linchaolong/p/Test/git/raw/master/README.md"
,
m_downloadDir
.
c_str
());
s_assetsManager
->
setDelegate
(
this
);
s_assetsManager
->
setConnectionTimeout
(
3
);
}
return
s_assetsManager
;
}
void
UpdateLayer
::
initDownloadDir
(){
// 如果下载目录不存在，则创建下载目录
#if (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32)
DIR
*
pDir
=
NULL
;
pDir
=
opendir
(
m_downloadDir
.
c_str
());
if
(
!
pDir
)
{
mkdir
(
m_downloadDir
.
c_str
(),
S_IRWXU
|
S_IRWXG
|
S_IRWXO
);
}
#else
if
((
GetFileAttributesA
(
m_downloadDir
.
c_str
()))
==
INVALID_FILE_ATTRIBUTES
)
{
CreateDirectoryA
(
m_downloadDir
.
c_str
(),153)">0
);
}
#endif
}
void
UpdateLayer
::
deleteDir
(
std
::
string
dir
){
// Remove downloaded files
#if (CC_TARGET_PLATFORM != CC_PLATFORM_WIN32)
std
::
string
command
=
"rm -r "
;
// Path may include space.
command
+=
"
"
"
+
dir
+
"
;
system
(
command
.
c_str
());
#else
std
::
string
command
=
"rd /s /q "
;
// Path may include space.
command
+=
"
;
system
(
command
.
c_str
());
#endif
}
void
UpdateLayer
::
onError
(
cocos2d
::
extension
::
AssetsManager
::
ErrorCode
errorCode
){
switch
(
errorCode
)
{
case
cocos2d:
:
extension
::
AssetsManager
::
kCreateFile
:
CCLOG
(
"error : create file failure"
);
m_label
->
setString
(
"error : create file failure"
);
break
;
case
cocos2d:
:
extension
::
AssetsManager
::
kNetwork
:
CCLOG
(
"error : no network"
);
m_label
->
setString
(
"error : no network"
);
break
;
case
cocos2d:
:
extension
::
AssetsManager
::
kNoNewVersion
:
CCLOG
(
"error : no new version"
);
m_label
->
setString
(
"error : no new version"
);
break
;
case
cocos2d:
:
extension
::
AssetsManager
::
kUncompress
:
CCLOG
(
"error : uncompress file error"
);
m_label
->
setString
(
"error : uncompress file error"
);
break
;
default:
break
;
}
}
void
UpdateLayer
::
onProgress
(
int
percent
){
char
progress
[
20
];
snprintf
(
progress
,153)">20
,240)">"downloading %d%%"
,
percent
);
CCLOG
(
"%s"
,
progress
);
m_label
->
setString
(
progress
);
}
void
UpdateLayer
::
onSuccess
(){
CCLOG
(
"download success."
);
m_label
->
setString
(
"download success."
);
}
void
UpdateLayer
::
update
(
CCObject
*
pSender
){
// 初始化下载目录
initDownloadDir
();
// 下载更新包
getAssetsManager
()
->
update
();
}
void
UpdateLayer
::
reset
(
CCObject
*
pSender
){
if
(
""
!=
m_downloadDir
)
{
// 删除下载目录
deleteDir
(
m_downloadDir
);
}
// 删除版本号
getAssetsManager
()
->
deleteVersion
();
}
void
UpdateLayer
::
getClientVersion
(
CCObject
*
pSender
){
CCString
*
msg
=
CCString
::
createWithFormat
(
"current client version : %s"
,
getAssetsManager
()
->
getVersion
().
c_str
());
CCLOG
(
msg
->
getCString
());
m_label
->
setString
(
msg
->
getCString
());
}
void
UpdateLayer
::
checkUpdate
(
CCObject
*
pSender
){
if
(
getAssetsManager
()
->
checkUpdate
())
{
CCLOG
(
"has new version"
);
m_label
->
setString
(
"has new version"
);
}
else
{
CCLOG
(
"has not new version"
);
m_label
->
setString
(
"has not new version"
);
}
}
void
UpdateLayer
::
enterScene
(
CCObject
*
pSender
){
CCDirector
::
sharedDirector
()
->
replaceScene
(
HelloWorld
::
scene
());
}
|
来自CODE的代码片
UpdateLayer.cpp
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#ifndef __HOTUPDATER_H__
#define __HOTUPDATER_H__
#include "cocos2d.h"
USING_NS_CC
;
#include "cocos-ext.h"
USING_NS_CC_EXT
;
#include "AssetsManager/AssetsManager.h"
// 热更新实现示例
class
UpdateLayer
:
public
CCLayer
,
public
AssetsManagerDelegateProtocol
{
public:
static
CCScene
*
scene
(){
CCScene
*
scene
=
CCScene
::
create
();
scene
->
addChild
(
UpdateLayer
::
create
());
return
scene
;
};
static
UpdateLayer
*
create
(){
UpdateLayer
*
pLayer
=
new
UpdateLayer
;
if
(
pLayer
&&
pLayer
->
init
())
{
pLayer
->
autorelease
();
return
pLayer
;
}
delete
pLayer
;
NULL
;
};
// 初始化
bool
init
();
// 下载回调函数
virtual
void
onError
(
cocos2d
::
extension
::
AssetsManager
::
ErrorCode
errorCode
);
onProgress
(
int
percent
);
onSuccess
();
// 菜单回调函数
reset
(
CCObject
*
pSender
);
// 重置版本
getClientVersion
(
CCObject
*
pSender
);
// 获取当前客户端版本号
checkUpdate
(
CCObject
*
pSender
);
// 检查是否有版本更新
update
(
CCObject
*
pSender
);
// 更新版本
enterScene
(
CCObject
*
pSender
);
// 进入场景，如果未更新屏幕中间会显示叹号的图片，更新后会显示另一张图片
protected:
// 初始化下载目录
initDownloadDir
();
// 删除目录
deleteDir
(
std
::
string
dir
);
private:
CCLabelTTF
*
m_label
;
std
::
string
m_downloadDir
;
AssetsManager
*
getAssetsManager
();
};
#endif
|
