char * string nsstring 之间的相互转换

std::string转NSString

std::string _string("hello");NSString *str= [NSString stringWithCString:_string.c_str() encoding:[NSString defaultCStringEncoding]];NSString转std::string

NSString  * nsfaceName=@"HELLO";
const char  *  lpfaceName = [nsfaceName UTF8String];
std::string   strFaceName=  [nsfaceName UTF8String];

//NSString转换char    NSString * str1= @"Test";    const char * c1 =[str1 UTF8String];    //char转换NSString    const char * c2 ="test";    NSString *str2 = [NSString stringWithUTF8String:c2];