cocos2dx读取xml详细解析

From: http://www.jb51.cc/article/p-twvxsamc-dk.html

原文地址：http://blog.csdn.net/comeontom/article/details/7933692】

这些天被cocos2dx如何读取xml困惑着，现在总结总结，如有错误，欢迎指正！

先新建一个cocos2dx的工程

HelloWorldScene.cpp中的代码如下：

[cpp] view plain copy print ?

1. #include"HelloWorldScene.h"
3. usingnamespacecocos2d;
5. CCScene*HelloWorld::scene()
6. {
7. CCScene*scene=NULL;
8. do
9. {
10. //'scene'isanautoreleaseobject
11. scene=CCScene::create();
12. CC_BREAK_IF(!scene);
14. //'layer'isanautoreleaseobject
15. HelloWorld*layer=HelloWorld::create();
16. CC_BREAK_IF(!layer);
18. //addlayerasachildtoscene
19. scene->addChild(layer);
20. }while(0);
22. //returnthescene
23. returnscene;
24. }
26. //on"init"youneedtoinitializeyourinstance
27. boolHelloWorld::init()
28. {
29. boolbRet=false;
30. do
31. {
32. //////////////////////////////////////////////////////////////////////////
33. //superinitfirst
34. //////////////////////////////////////////////////////////////////////////
36. CC_BREAK_IF(!CCLayer::init());
38. //////////////////////////////////////////////////////////////////////////
39. //addyourcodesbelow...
40. //////////////////////////////////////////////////////////////////////////
42. //1.Addamenuitemwith"X"image,whichisclickedtoquittheprogram.
44. //Createa"close"menuitemwithcloseicon,it'sanautoreleaseobject.
45. CCMenuItemImage*pCloseItem=CCMenuItemImage::create(
46. "CloseNormal.png",
47. "CloseSelected.png",
48. this,
49. menu_selector(HelloWorld::menuCloseCallback));
50. CC_BREAK_IF(!pCloseItem);
52. //Placethemenuitembottom-rightconner.
53. pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width-20,20));
55. //Createamenuwiththe"close"menuitem,it'sanautoreleaseobject.
56. CCMenu*pMenu=CCMenu::create(pCloseItem,NULL);
57. pMenu->setPosition(CCPointZero);
58. CC_BREAK_IF(!pMenu);
60. //AddthemenutoHelloWorldlayerasachildlayer.
61. this->addChild(pMenu,1);
63. //2.Addalabelshows"HelloWorld".
65. //Createalabelandinitializewithstring"HelloWorld".
67. //最外面的CCDictionary
68. CCDictionary*pDict=CCDictionary::createWithContentsOfFile("strings.xml");
70. //第二层CCDictionary
71. CCDictionary*pDict_2=newCCDictionary();
72. pDict_2->retain();
73. pDict_2=(CCDictionary*)pDict->objectForKey("special");
74. /*
75. 如果在同一个key下面存在<string>hhhhh</string>
76. <string>comeontom</string>
77. <true></true>
78. 这些关键词，则输出最后一个
79. */
80. CCLOG("pDict_2:%s",((CCString*)pDict_2->valueForKey("special_1"))->getCString());
82. /*第三层下面说的是Array中包含string
83. <key>special_2</key>
84. <array>
85. <string>comeontom1</string>
86. <string>comeontom2</string>
87. <string>comeontom3</string>
88. </array>
89. */
90. CCArray*pArray2=newCCArray();
91. pArray2->retain();
92. pArray2=(CCArray*)pDict_2->objectForKey("special_2");
93. for(inti=0;i<pArray2->count();i++)
94. {
95. CCLOG("pArray2%i:%s",i+1,((CCString*)pArray2->objectAtIndex(i))->getCString());
96. }
98. /*第三层下面说的是Array中包含string
99. <key>special_3</key>
100. <array>
101. <integer>45.0</integer>
102. <integer>3</integer>
103. <integer>43.444</integer>
104. </array>
105. */
106. CCArray*pArray3=newCCArray();
107. pArray3->retain();
108. pArray3=(CCArray*)pDict_2->objectForKey("special_3");
109. for(inti=0;i<pArray3->count();i++)
110. {
111. CCLOG("pArray3%i:%s",((CCString*)pArray3->objectAtIndex(i))->getCString());
112. }
113. /*第三层
114. <key>special_4</key>
115. <real>多媒体</real>
116. */
117. CCLOG("pDict_2:%s",((CCString*)pDict_2->valueForKey("special_4"))->getCString());
118. /*第三层
119. <key>special_5</key>
120. <false></false>
121. */
122. CCLOG("pDict_2:%s",((CCString*)pDict_2->valueForKey("special_5"))->getCString());
126. CCLOG("strings.xmlCounts:%d",pDict->count());
127. CCLOG("pDict:%s",pDict);
128. CCArray*pArray=newCCArray();
129. pArray=pDict->allKeys();//把所有的键值付给pArray
130. for(inti=0;i<pArray->count();i++)
131. {
132. CCLOG("pArray%i:%s",((CCString*)pArray->objectAtIndex(i))->getCString());
133. }
136. CCLabelTTF*pLabel=CCLabelTTF::create(((CCString*)pDict->objectForKey("chinese1"))->getCString(),"Arial",24);
137. /*CCLabelTTF*pLabel=CCLabelTTF::create(((CCString*)pArray->objectAtIndex(3))->getCString(),"Arial",24);*/
139. //CCLabelTTF*pLabel=CCLabelTTF::create("HelloWorld",24);
140. CC_BREAK_IF(!pLabel);
142. //Getwindowsizeandplacethelabelupper.
143. CCSizesize=CCDirector::sharedDirector()->getWinSize();
144. pLabel->setPosition(ccp(size.width/2,size.height-50));
146. //AddthelabeltoHelloWorldlayerasachildlayer.
147. this->addChild(pLabel,1);
149. //3.Addaddasplashscreen,showthecocos2dsplashimage.
150. CCSprite*pSprite=CCSprite::create("HelloWorld.png");
151. CC_BREAK_IF(!pSprite);
153. //Placethespriteonthecenterofthescreen
154. pSprite->setPosition(ccp(size.width/2,size.height/2));
156. //AddthespritetoHelloWorldlayerasachildlayer.
157. this->addChild(pSprite,0);
159. bRet=true;
160. }while(0);
162. returnbRet;
163. }
165. voidHelloWorld::menuCloseCallback(CCObject*pSender)
166. {
167. //"close"menuitemclicked
168. CCDirector::sharedDirector()->end();
169. }

#include "HelloWorldScene.h"

using namespace cocos2d;

CCScene* HelloWorld::scene()
{
    CCScene * scene = NULL;
    do 
    {
        // 'scene' is an autorelease object
        scene = CCScene::create();
        CC_BREAK_IF(! scene);

        // 'layer' is an autorelease object
        HelloWorld *layer = HelloWorld::create();
        CC_BREAK_IF(! layer);

        // add layer as a child to scene
        scene->addChild(layer);
    } while (0);

    // return the scene
    return scene;
}

// on "init" you need to initialize your instance
bool HelloWorld::init()
{
    bool bRet = false;
    do 
    {
        //////////////////////////////////////////////////////////////////////////
        // super init first
        //////////////////////////////////////////////////////////////////////////

        CC_BREAK_IF(! CCLayer::init());

        //////////////////////////////////////////////////////////////////////////
        // add your codes below...
        //////////////////////////////////////////////////////////////////////////

        // 1. Add a menu item with "X" image,which is clicked to quit the program.

        // Create a "close" menu item with close icon,it's an auto release object.
        CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
            "CloseNormal.png","CloseSelected.png",this,menu_selector(HelloWorld::menuCloseCallback));
        CC_BREAK_IF(! pCloseItem);

        // Place the menu item bottom-right conner.
        pCloseItem->setPosition(ccp(CCDirector::sharedDirector()->getWinSize().width - 20,20));

        // Create a menu with the "close" menu item,it's an auto release object.
        CCMenu* pMenu = CCMenu::create(pCloseItem,NULL);
        pMenu->setPosition(CCPointZero);
        CC_BREAK_IF(! pMenu);

        // Add the menu to HelloWorld layer as a child layer.
        this->addChild(pMenu,1);

        // 2. Add a label shows "Hello World".

        // Create a label and initialize with string "Hello World".

		//最外面的 CCDictionary
		CCDictionary* pDict = CCDictionary::createWithContentsOfFile("strings.xml");

		//第二层 CCDictionary
		CCDictionary* pDict_2 = new CCDictionary();
		pDict_2->retain();
		pDict_2 = (CCDictionary*)pDict->objectForKey("special");
		/*
		如果在同一个key下面存在<string>hhhhh</string>
							   <string>comeontom</string>
							   <true></true>
		这些关键词，则输出最后一个
		*/
		CCLOG("pDict_2:%s",((CCString*)pDict_2->valueForKey("special_1"))->getCString());

		/*第三层  下面说的是Array中包含string
		<key>special_2</key>
		<array>
			<string>comeontom1</string>
			<string>comeontom2</string>
			<string>comeontom3</string>
		</array>
		*/
		CCArray* pArray2 = new CCArray();
		pArray2->retain();
		pArray2 = (CCArray*)pDict_2->objectForKey("special_2");
		for (int i = 0;i < pArray2->count();i++)
		{
			CCLOG("pArray2%i:%s",((CCString*)pArray2->objectAtIndex(i))->getCString());
		}

		/*第三层  下面说的是Array中包含string 
		<key>special_3</key>
		<array>
			<integer>45.0</integer>
			<integer>3</integer>
			<integer>43.444</integer>
		</array>
		*/
		CCArray* pArray3 = new CCArray();
		pArray3->retain();
		pArray3 = (CCArray*)pDict_2->objectForKey("special_3");
		for (int i = 0;i < pArray3->count();i++)
		{
			CCLOG("pArray3%i:%s",((CCString*)pArray3->objectAtIndex(i))->getCString());
		}
		/*第三层
		<key>special_4</key>
		<real>多媒体</real>
		*/
		CCLOG("pDict_2:%s",((CCString*)pDict_2->valueForKey("special_4"))->getCString());
		/*第三层
		<key>special_5</key>
		<false></false>
		*/
		CCLOG("pDict_2:%s",((CCString*)pDict_2->valueForKey("special_5"))->getCString());



		CCLOG("strings.xmlCounts:%d",pDict->count());
		CCLOG("pDict:%s",pDict);
		CCArray* pArray = new CCArray();
		pArray = pDict->allKeys();//把所有的键值付给pArray
		for (int i = 0;i < pArray->count();i++)
		{
			CCLOG("pArray%i:%s",((CCString*)pArray->objectAtIndex(i))->getCString());
		}
			
	
		CCLabelTTF* pLabel = CCLabelTTF::create(((CCString*)pDict->objectForKey("chinese1"))->getCString(),24);
		/*CCLabelTTF* pLabel = CCLabelTTF::create(((CCString*)pArray->objectAtIndex(3))->getCString(),24);*/

       // CCLabelTTF* pLabel = CCLabelTTF::create("Hello World",24);
        CC_BREAK_IF(! pLabel);

        // Get window size and place the label upper. 
        CCSize size = CCDirector::sharedDirector()->getWinSize();
        pLabel->setPosition(ccp(size.width / 2,size.height - 50));

        // Add the label to HelloWorld layer as a child layer.
        this->addChild(pLabel,1);

        // 3. Add add a splash screen,show the cocos2d splash image.
        CCSprite* pSprite = CCSprite::create("HelloWorld.png");
        CC_BREAK_IF(! pSprite);

        // Place the sprite on the center of the screen
        pSprite->setPosition(ccp(size.width/2,size.height/2));

        // Add the sprite to HelloWorld layer as a child layer.
        this->addChild(pSprite,0);
		
        bRet = true;
    } while (0);

    return bRet;
}

void HelloWorld::menuCloseCallback(CCObject* pSender)
{
    // "close" menu item clicked
    CCDirector::sharedDirector()->end();
}

strings.xml代码如下：

[html] view plain copy print ?

1. <?xmlversion="1.0"encoding="UTF-8"?>
2. <!DOCTYPEplistPUBLIC"-//Apple//DTDPLIST1.0//EN""http://www.apple.com/DTDs/PropertyList-1.0.dtd">
3. <plistversion="1.0">
4. <dict>
5. <key>special</key>
6. <string>
7. <dict>
8. <key>special_1</key>
9. <string>hhhhh</string>
10. <string>comeontom</string>
11. <true></true>
12. <key>special_2</key>
13. <array>
14. <string>comeontom1</string>
15. <string>comeontom2</string>
16. <string>comeontom3</string>
17. </array>
18. <key>special_3</key>
19. <array>
20. <integer>45.0</integer>
21. <integer>3</integer>
22. <integer>43.444</integer>
23. </array>
24. <key>special_4</key>
25. <real>多媒体</real>
26. <key>special_5</key>
27. <false></false>
28. </dict>
29. </string>
30. <key>chinese1</key>
31. <string>美好的一天</string>
32. <key>japanese</key>
33. <string>良い一日を</string>
34. <key>spanish</key>
35. <string>Buendía</string>
36. </dict>
37. </plist>

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
  <key>special</key>
  <string>
  	<dict>
		<key>special_1</key>
		<string>hhhhh</string>
		<string>comeontom</string>
		<true></true>
		<key>special_2</key>
		<array>
			<string>comeontom1</string>
			<string>comeontom2</string>
			<string>comeontom3</string>
		</array>
		<key>special_3</key>
		<array>
			<integer>45.0</integer>
			<integer>3</integer>
			<integer>43.444</integer>
		</array>
		<key>special_4</key>
		<real>多媒体</real>
		<key>special_5</key>
		<false></false>
	</dict>
  </string>
	<key>chinese1</key>
	<string>美好的一天</string>
	<key>japanese</key>
	<string>良い一日を</string>
	<key>spanish</key>
	<string>Buen día</string>
</dict>
</plist>

最后来个总结：

dict:建立字典
key：字典里面的关键词
integer：整形，其实和string、real的功能差不多，起配对作用
real：和integer、string的功能差不多，起配对作用
true：<true></true>如果这样写，输出的是1
false：<false></false> 输出的是0
string：和integer、real的功能差不多，起配对作用
array：建立数组

当然了，有兴趣看源码的同学，可以看这个文件：CCFileUtilsCommon_cpp.h（位置：cocos2dx\platform）