C/C++和Objective-C混合编程时一些有用的代码片段

NSString和std::string的相互转换

• std::string to NSString

std::string str = testStr();
NSString* ns = [NSString stringWithCString:str.c_str()  encoding:NSUTF8StringEncoding];

• NSString to std::string

NSString *str = @"it is nsstring";  
std::string str = std::string([str UTF8String]);