今天写的XML相关内容：随着上述眼前的小项目（等级类别）由于地图每个级别。因此，让他动态读取XML内容，这样的变化只能看到XML档。

简单的想法：第一次使用UserDefault类写入文件

UserDefault::getInstance()->setStringForKey("ID","2");

	std::string value = UserDefault::getInstance()->getStringForKey("ID");

	log("UserDefault: ID  = %s",value.c_str());

这种话在 \proj.win32\Debug.win32以下生成的 UserDefault.xml 文件里的内容是：

以后仅仅要过关就向这个文件里写入下一关的 ID就能够了，而关卡的信息在以下的 config.xml中，   注意相应的ID

config.xml:

 <Root>

		<Stage ID = "1">

			<name>map01.tmx</name>

			<property1 one = "256" two = "168" three = "visSize.width/4" />

			<property2 one = "480" two = "168" three = "visSize.width/17.1" />

			<property3 one = "704" two = "168" three = "visSize.width/4" />

			<property4 one = "144" two = "294" three = "visSize.width/3.5" />

			<property5 one = "480" two = "294" three = "visSize.width/5.5" />

			<property6 one = "816" two = "296" three = "visSize.width/3.4" />

			<property7 one = "320" two = "424" three = "visSize.width/8" />

			<property8 one = "672" two = "424" three = "visSize.width/8" />

		</Stage>

		<Stage ID = "2">

			<name>map02.tmx</name>

			<property1 one = "256" two = "168" three = "visSize.width/4" />

			<property2 one = "480" two = "168" three = "visSize.width/17.1" />

			<property3 one = "704" two = "168" three = "visSize.width/4" />

			<property4 one = "144" two = "294" three = "visSize.width/3.5" />

			<property5 one = "480" two = "294" three = "visSize.width/5.5" />

			<property5 one = "816" two = "296" three = "visSize.width/3.4" />

			<property5 one = "320" two = "424" three = "visSize.width/8" />

			<property5 one = "672" two = "424" three = "visSize.width/8" />

		</Stage>

		<Stage ID = "3">

			<name>map01.tmx</name>

			<property4 one = "144" two = "294" three = "visSize.width/3.5" />

			<property5 one = "480" two = "294" three = "visSize.width/5.5" />

			<property6 one = "816" two = "296" three = "visSize.width/3.4" />

			<property7 one = "320" two = "424" three = "visSize.width/8" />

			<property8 one = "672" two = "424" three = "visSize.width/8" />

		</Stage>

		<Stage ID = "4">

			<name>map02.tmx</name>

			<property1 one = "256" two = "168" three = "visSize.width/4" />

			<property2 one = "480" two = "168" three = "visSize.width/17.1" />

			<property3 one = "704" two = "168" three = "visSize.width/4" />

		</Stage>

 </Root>

这些数据就是 每关地图的信息，依据须要自己能够配置。

以下我们就依据 UserDefault.xml 中的 ID 来 找到 config.xml 中相应的 关卡信息。！！

新建 一个场景吧。

。

。

.h文件

#pragma once

#include "cocos2d.h"

#include "tinyxml2/tinyxml2.h"

using namespace cocos2d;

using namespace tinyxml2;

class One:public Scene{

public:

	virtual bool init();

	CREATE_FUNC(One);

	static Scene *createScene();

	XMLElement *Stage;

	std::string ID;

	void addGround(int posX,int posY,int width);

};

.cpp文件：

#include "One.h"

#include "Two.h"

Scene *One::createScene(){

	Scene *scene = Scene::create();

	auto layer = One::create();

	scene->addChild(layer);

	return scene;

}

bool One::init(){

	if (!Scene::initWithPhysics())

	{

		return false;

	}

	//可视区的大小

	 Size visSize = Director::getInstance()->getVisibleSize();

	 //显示边框,凝视了就不显示了

	 this->getPhysicsWorld()->setDebugDrawMask(PhysicsWorld::DEBUGDRAW_ALL);

	UserDefault::getInstance()->setStringForKey("ID","2");//这里运行一次就ok了，生成文件就好了

	std::string value = UserDefault::getInstance()->getStringForKey("ID");

	log("UserDefault: ID  = %s",value.c_str());

	//找到文件

	auto xmlFileName = FileUtils::getInstance()->fullPathForFilename("config.xml");//得到文件的位置

	log("%s",xmlFileName.c_str());//验证是否正确  

	//创建解析器

	tinyxml2::XMLDocument doc;

	doc.LoadFile(xmlFileName.c_str());//将文件盒解析器。

。

//获取根节点

	XMLElement *root = doc.RootElement();

	//

	XMLElement *stage = root->FirstChildElement();

	while (stage!=nullptr){

		auto id = stage->Attribute("ID");

		if (id == value){

			ID = id;

			Stage = stage;

		}

		stage = stage->NextSiblingElement();

	}

	//获取名字节点

	XMLElement *name = Stage->FirstChildElement();

	//获取名字节点的内容

	auto content = name->GetText();

	name = name->NextSiblingElement();

	log("%s",content);

	while (name!=nullptr){

		//获取属性节点(位置)

		auto one = name->Attribute("one");

		auto two = name->Attribute("two");

		auto three = name->Attribute("three");

		log("%s,%s,%s",one,two,three);

		//画线

		float _one = atof(one);

		float _two = atof(two);

		float _three = atof(three);

		addGround(_one,_two,200);  //这里的数据自己填写

		name = name->NextSiblingElement();

	}

	return true;

}

void One::addGround(int posX,int posY,int width){		//加入地板

	//加入地板

	auto ground = Sprite::create();//就是一个精灵

	ground->setPhysicsBody(PhysicsBody::createBox(Size(width,3)));

	ground->setTextureRect(Rect(0,0,width,3));//设置纹理的 宽 高

	ground->setPosition(Vec2(posX,posY));//设置地板的 位置

	ground->getPhysicsBody()->setDynamic(false);

	this->addChild(ground);

}

这样就好了，仅仅要你想读取哪一个关卡的信息 就直接在 UserDefault.xml中改动 ID即可了。假设想配置关卡的信息。直接 改动 config.xml文件即可了！感觉这样会略微省事一点，假设哪里不正确请吐槽，一起学习进步，谢谢！

执行界面例如以下：

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