[Objective-C] NSString convert to char, char to NSString

📌char to NSString

const char *szTest = "Hello";
NSString *nstrTest = [NSString stringWithUTF8String:szTest];

 

📌NSString to char

NSString *nstrTest = @"Hello";
const char *szTest = [nstrTest UTF8String];

 

objective-c에서 c언어 함수를 호출할 때도 필요할 것 같다.