How to convert ASCII value to a character in Objective-C?
This is how you can work with ASCII values and NSString. Note that since NSString is working with unichars, there could be unexpected results for a non ASCII string.
// NSString to ASCII
NSString *string = @"A";
int asciiCode = [string characterAtIndex:0]; // 65
// ASCII to NSString
int asciiCode = 65;
NSString *string = [NSString stringWithFormat:@"%c", asciiCode]; // A
//char to int ASCII-code
char c = 'a';
int ascii_code = (int)c;
//int to char
int i = 65; // A
c = (char)i;