NSString to char

[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.