Cocos2d-x手游技术分享（1）-【天天打蚊子】数据存储与音效篇

前言：

　　手游项目《天天打蚊子》终于上线，特地写几篇技术分享文章，分享一下其中使用到的技术，其中使用cocos2d-x引擎，首选平台iOS，也请有iPhone或者iPad的朋友帮忙下载好评。十分感谢。

目前完美支持iPhone4、iPhone 4S、iPhone 5、iPad所有版本，iOS 5以上开始支持。

　　目前开发团队3个人，本人客户端+服务端，另有1名客户端，1名美术，目前创业刚刚起步，请各位好友支持！

　　《天天打蚊子》下载地址：https://itunes.apple.com/cn/app/id681203794

　　

一、Cocos2d-x中的数据存储。

1、CCUserDefault数据存储

CCUserDefault头文件：

 class CC_DLL CCUserDefault
 {
 public:
     ~CCUserDefault();

     // get value methods

     /**
     @brief Get bool value by key, if the key doesn't exist, a default value will return.
      You can set the default value, or it is false.
     */
     bool    getBoolForKey(const char* pKey);
     bool    getBoolForKey(const char* pKey, bool defaultValue);
     /**
     @brief Get integer value by key, if the key doesn't exist, a default value will return.
      You can set the default value, or it is 0.
     */
     int     getIntegerForKey(const char* pKey);
     int     getIntegerForKey(const char* pKey, int defaultValue);
     /**
     @brief Get float value by key, if the key doesn't exist, a default value will return.
      You can set the default value, or it is 0.0f.
     */
     float    getFloatForKey(const char* pKey);
     float    getFloatForKey(const char* pKey, float defaultValue);
     /**
     @brief Get double value by key, if the key doesn't exist, a default value will return.
      You can set the default value, or it is 0.0.
     */
     double  getDoubleForKey(const char* pKey);
     double  getDoubleForKey(const char* pKey, double defaultValue);
     /**
     @brief Get string value by key, if the key doesn't exist, a default value will return.
     You can set the default value, or it is "".
     */
     std::string getStringForKey(const char* pKey);
     std::string getStringForKey(const char* pKey, const std::string & defaultValue);

     // set value methods

     /**
     @brief Set bool value by key.
     */
     void    setBoolForKey(const char* pKey, bool value);
     /**
     @brief Set integer value by key.
     */
     void    setIntegerForKey(const char* pKey, int value);
     /**
     @brief Set float value by key.
     */
     void    setFloatForKey(const char* pKey, float value);
     /**
     @brief Set double value by key.
     */
     void    setDoubleForKey(const char* pKey, double value);
     /**
     @brief Set string value by key.
     */
     void    setStringForKey(const char* pKey, const std::string & value);
     /**
      @brief Save content to xml file
      */
     void    flush();

     static CCUserDefault* sharedUserDefault();
     static void purgeSharedUserDefault();
     const static std::string& getXMLFilePath();
     static bool isXMLFileExist();

 private:
     CCUserDefault();
     static bool createXMLFile();
     static void initXMLFilePath();

     static CCUserDefault* m_spUserDefault;
     static std::string m_sFilePath;
     static bool m_sbIsFilePathInitialized;
 };

CCUserDefault.h

　　其中包括多种方法（getBoolForKey，getFloatForKey，getIntegerForKey等等），可根据具体需要存储的数据类型进行选择。

具体实现：

　　比如在游戏开发过程中，要实现本地存储新手引导中的某一步是否已经访问过，我可以这样：

 bool DataHelper::getIsVisit(EnumNewUserGuid type)
 {
     const char * key = CCString::createWithFormat("NewUserGuid_%d",type)->getCString();
     return  CCUserDefault::sharedUserDefault()->getBoolForKey(key, false);
 }

 void DataHelper::setVisit(EnumNewUserGuid type)
 {
     const char * key = CCString::createWithFormat("NewUserGuid_%d",type)->getCString();
     CCUserDefault::sharedUserDefault()->setBoolForKey(key, true);
 }

　　其中，EnumNewUserGuid为新手引导的步骤的枚举。

　　下面将使用CCUserDefault实现音效管理。

2、iOS keychain数据存储

　　上篇文章讲到iOS keychain的数据存储方法，本文加上为C++的接口。keychain.h keychain.m文件再贴一次。

 #import <Foundation/Foundation.h>

 @interface Keychain : NSObject
 //keychain
 + (NSMutableDictionary *)getKeychainQuery:(NSString *)service;
 + (void)saveData:(NSString *)service data:(id)data;
 + (id)loadData:(NSString *)service;
 + (void)deleteData:(NSString *)service;
 @end

keychain.h

 #import "Keychain.h"

 @implementation Keychain

 //keychain
 + (NSMutableDictionary *)getKeychainQuery:(NSString *)service
 {
     NSMutableDictionary * dict = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   (id)kSecClassGenericPassword,(id)kSecClass,
                                   service, (id)kSecAttrService,
                                   service, (id)kSecAttrAccount,
                                   (id)kSecAttrAccessibleAfterFirstUnlock,(id)kSecAttrAccessible,
                                   nil];
     return dict;
 }

 + (void)saveData:(NSString *)service data:(id)data
 {
     //Get search dictionary
     NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
     //Delete old item before add new item
     SecItemDelete((CFDictionaryRef)keychainQuery);
     //Add new object to search dictionary(Attention:the data format)
     [keychainQuery setObject:[NSKeyedArchiver archivedDataWithRootObject:data] forKey:(id)kSecValueData];
     //Add item to keychain with the search dictionary
     SecItemAdd((CFDictionaryRef)keychainQuery, NULL);
 }

 + (id)loadData:(NSString *)service
 {
     id ret = nil;
     NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
     //Configure the search setting
     //Since in our simple case we are expecting only a single attribute to be returned (the password) we can set the attribute kSecReturnData to kCFBooleanTrue
     [keychainQuery setObject:(id)kCFBooleanTrue forKey:(id)kSecReturnData];
     [keychainQuery setObject:(id)kSecMatchLimitOne forKey:(id)kSecMatchLimit];
     CFDataRef keyData = NULL;
     if (SecItemCopyMatching((CFDictionaryRef)keychainQuery, (CFTypeRef *)&keyData) == noErr) {
         @try {
             ret = [NSKeyedUnarchiver unarchiveObjectWithData:(NSData *)keyData];
         } @catch (NSException *e) {
             CLog(@"Unarchive of %@ failed: %@", service, e);
         } @finally {
         }
     }
     if (keyData)
         CFRelease(keyData);
     return ret;
 }

 + (void)deleteData:(NSString *)service
 {
     NSMutableDictionary *keychainQuery = [self getKeychainQuery:service];
     SecItemDelete((CFDictionaryRef)keychainQuery);
 }

 @end

keychain.m

　　下面用keychain记录本地账号：

DBInfoAccount.h

 #include "cocos2d.h"

 using namespace cocos2d;

 class DBInfoAccount {

 public:

     int m_iUserID;
     CCString * m_pAccountID;
     CCString * m_pPassword;

     DBInfoAccount();
     static DBInfoAccount * getInstance();
     bool isHasAccount();

     //数据存取
     void loadData();
     static void saveData();
     static void reset();
 };

DBInfoAccount.mm

 #import "Keychain.h"
 #include "DBInfoAccount.h"

 //#define kAccount                @"Account"
 #define kAccountAccountID        @"Account_Account_ID"
 #define kAccountUserID            @"Account_UserID"
 #define kAccountPassword        @"Account_Pwd"

 static DBInfoAccount * s_pDBInfoAccount = NULL;

 DBInfoAccount::DBInfoAccount():
 m_iUserID()
 {
     m_pAccountID = new CCString("");
     m_pPassword = new CCString("");
 }

 DBInfoAccount * DBInfoAccount::getInstance()
 {
     if (s_pDBInfoAccount == NULL) {
         s_pDBInfoAccount -> loadData();
         if (s_pDBInfoAccount == NULL) {
             s_pDBInfoAccount = new DBInfoAccount;
         }
     }

     return s_pDBInfoAccount;
 }

 bool DBInfoAccount::isHasAccount()
 {
     return m_pAccountID!= NULL && m_pAccountID -> length()>;
 }

 void DBInfoAccount::loadData()
 {
     if (s_pDBInfoAccount == NULL) {
         NSString * accountID = [Keychain loadData: kAccountAccountID];
         NSString * userID = [Keychain loadData: kAccountUserID];
         NSString * password = [Keychain loadData: kAccountPassword];
         s_pDBInfoAccount = new DBInfoAccount;
         const char * c_accountID = [accountID cStringUsingEncoding:NSUTF8StringEncoding];
         DWORD c_userID = [userID  intValue];
         const char * c_password = [password cStringUsingEncoding:NSUTF8StringEncoding];

         if (c_accountID != NULL && c_password != NULL) {
             s_pDBInfoAccount -> m_pAccountID -> m_sString = c_accountID;
             s_pDBInfoAccount -> m_iUserID  = c_userID;
             s_pDBInfoAccount -> m_pPassword -> m_sString = c_password;
         }
     }
 }

 void DBInfoAccount::saveData()
 {
     NSString * accountID = [NSString stringWithCString:s_pDBInfoAccount->m_pAccountID->getCString() encoding:NSUTF8StringEncoding];
     NSString * userID = [NSString stringWithFormat:@"%d",s_pDBInfoAccount->m_iUserID];
     NSString * password = [NSString stringWithCString:s_pDBInfoAccount->m_pPassword->getCString() encoding:NSUTF8StringEncoding];
     [Keychain saveData:kAccountAccountID data: accountID];
     [Keychain saveData:kAccountUserID data: userID];
     [Keychain saveData:kAccountPassword data: password];
 }

 void DBInfoAccount::reset()
 {
     [Keychain deleteData:kAccountAccountID];
     [Keychain deleteData:kAccountUserID];
     [Keychain deleteData:kAccountPassword];
 }

　　具体用法一目了然，不再赘述。

二、音效管理。

　　废话不说，直接上代码：

  void DataHelper::initMusicAndEffect()
 {
     bool isEffectEnabel = DataHelper::getEffectEnable();
     CocosDenshion::SimpleAudioEngine::sharedEngine()->setEffectsVolume(isEffectEnabel);

     bool isMusicEnable = DataHelper::getMusicEnable();
     CocosDenshion::SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(isMusicEnable);
 }
  bool DataHelper::getEffectEnable()
 {
     return  CCUserDefault::sharedUserDefault()->getBoolForKey("Effect_Enable", true);
 }
  bool DataHelper::getMusicEnable()
 {
     return  CCUserDefault::sharedUserDefault()->getBoolForKey("Music_Enable", true);
 }
  void DataHelper::setEffectEnable(bool isEnable)
 {
     CCUserDefault::sharedUserDefault()->setBoolForKey("Effect_Enable", isEnable);
     CocosDenshion::SimpleAudioEngine::sharedEngine()->setEffectsVolume(isEnable);
 }
  void DataHelper::setMusicEnable(bool isEnable)
 {
     CCUserDefault::sharedUserDefault()->setBoolForKey("Music_Enable", isEnable);
     CocosDenshion::SimpleAudioEngine::sharedEngine()->setBackgroundMusicVolume(isEnable);
 }

　　其中，CocosDenshion::SimpleAudioEngine::sharedEngine()->setEffectsVolume(isEffectEnabel)，setEffectsVolume为设置的音效大小（0~1）的方法，这里使用false（0）和true（1）直接设置，实现是否设置为静音。

　　至于播放背景音乐和音效，最好使用mp3格式的，iOS和安卓同时支持。

　　具体：

 CocosDenshion::SimpleAudioEngine::sharedEngine()->playBackgroundMusic("bg.mp3", true);//播放背景音乐，第二个参数为是否循环播放

 CocosDenshion::SimpleAudioEngine::sharedEngine()->playEffect("anjian.mp3");//播放音效，比如按键声

《天天打蚊子》下载地址：https://itunes.apple.com/cn/app/id681203794

请各位多多支持，给个好评呀！谢谢！或者扫描二维码下载：

游戏视频：

后续cocos2d-x技术文章陆续放出，敬请关注！！