在做数据转换时，最好包含以下头文件

• #include <iostream>
• #include<cmath>
• <string>
• <sstream>
• USING_NS_CC;
• using namespacestd;

inta=3;

CCString* ns=CCString::createWithFormat("%d",a);

strings=ns->m_sString;

======================================

string转 CCString
std::string str = "123";

CCString* ns=CCString::createWithFormat("%s",str.c_str());

CCString转 string

std::strings= ns->m_sString;//ns是一个CCString*类型

======================================

char 转 int

char*buf ="1122";

intn =std::atoi(buf);

int 转 char

inta=3;

CCString* ns=CCString::createWithFormat("%d",a);

constchar* s=ns->getCString();

这里额外提一下，IOS在参与跨平台用到的编码格式转换

const char*char_url; const char*char_parameter;

格式刷：

NSString *endstr=[NSString stringWithFormat:@"%@?%@",char_url,char_parameter];

转换编码格式为utf－8

endstr=[endstr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];//解决中文编码

NSString 转 char*

const char *char_gurl = [endstr cStringUsingEncoding:NSUTF8StringEncoding];

char* 转 NSString

const char* gameObject;

NSString *char_gameObject = [[NSString alloc] initWithCString:(const char*)gameObject

encoding:NSUTF8StringEncoding];

char* 转 URL

const char* url;

NSString *char_url = [[NSString alloc] initWithCString:(const char*)url

encoding:NSUTF8StringEncoding];

NSURL* url=[NSURL URLWithString:char_url];

//NSString转char * /const char *

NSString* strPath = [NSStringstringWithUTF8String:filename];

constchar* filePathChar = [filePathUTF8String];