[NSString stringWithCString：变量编码：1]中的编码是什么； 或stringWithUTF8String

Question

What does encoding:1 mean and what other values can be passed? Please clarify arguments meaning, thanks.

 - (void)enterInfo {
    NSLog(@"What is the first name?");
    char cstring[40];
    scanf("%s", cstring);

    firstName = [NSString stringWithCString:cstring encoding:1];
}

- (void)printInfo {
   NSLog(@"First name: %@", firstName);
}

Answer 1

1 is NSASCIIStringEncoding and should not be passed as 1 but like:

firstName = [NSString stringWithCString:cstring encoding:NSASCIIStringEncoding];

You can find the full list of encoding in the NSString documentation