Convert a NSString to a char pointer

NSString+Char.h

#import <Foundation/Foundation.h>

@interface NSString (Char)
-(char *)toChar;
@end

NSString+Char.m

#import "NSString+Char.h"

@implementation NSString (Char)

/*
 * Convert a NSString to a char pointer
*/
-(char *)toChar{
  const char* strUtf8 = [self UTF8String];
  size_t len          = strlen(strUtf8) + 1;
  char *toChar        = malloc(len);
  memcpy(toChar, strUtf8, len);
  return toChar;
}

@end