ball.json 数据如下：

1. {
2. "entities":[
3. {
4. "entity":{
5. "TapOpposite":0,
6. "Interval":0.95,
7. "BallNum":1
8. }
9. },248)"> {
10. "entity":{
11. "TapOpposite":0,108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> "Interval":0.91,248)"> "BallNum":2
12. }
13. },108); list-style:decimal-leading-zero outside; color:inherit; line-height:18px; margin:0px!important; padding:0px 3px 0px 10px!important"> "BallNum":3
14. ]
15. }

在cocos2dx中json的读取是用的rapidjson,包含在cocostudio工程中。所以我们要先引入#include "cocostudio/CocoStudio.h"

voidGameWorld::readJson()
1. //json文档
2. rapidjson::Document_doc;
3. boolbRet=false;
4. ssize_tsize=0;
5. unsignedchar*pBytes=NULL;
6. do{
7. pBytes=cocos2d::CCFileUtils::sharedFileUtils()->getFileData("ball.json","r",&size);
8. CC_BREAK_IF(pBytes==NULL||strcmp((char*)pBytes,"")==0);
9. std::stringload_str((const CC_SAFE_DELETE_ARRAY(pBytes);
10. _doc.Parse<0>(load_str.c_str());
11. CC_BREAK_IF(_doc.HasParseError());
12. //生成json文档对像
14. if(!_doc.IsObject())
15. return;
17. //是否有此成员
18. if(!_doc.HasMember("entities"))
19. //通过[]取成员值,再根据需要转为array,int,double,string
20. constrapidjson::Value&pArray=_doc["entities"];
21. //是否是数组
22. if(!pArray.IsArray())
23. return;
24. for(rapidjson::SizeTypei=0;i<pArray.Size();i++)
25. constrapidjson::Value&p=pArray[i];
26. if(p.HasMember("entity"))
27. constrapidjson::Value&valueEnt=p["entity"];
28. if(valueEnt.HasMember("TapOpposite")&&valueEnt.HasMember("Interval")&&valueEnt.HasMember("BallNum"))
29. constrapidjson::Value&tapOpposite=valueEnt["TapOpposite"];
30. inttapOp=tapOpposite.GetInt();//得到int值
31. constrapidjson::Value&interval=valueEnt["Interval"];
32. floatinter=interval.GetDouble();//得到float,double值
33. constrapidjson::Value&ballNum=valueEnt["BallNum"];
34. intball=ballNum.GetInt(); ballParamparam;
35. param.tapOp=tapOp;
36. param.inter=inter;
37. param.ballIndex=ball;
38. m_ballParamVec.push_back(param);
39. else
40. bRet=true;
41. }while(0);
42. }