How to iterate through the characters of an NSString

Question

NSString *myStrings = @\"abcdefghijklmnopqrstuvwxyz\";

How could I iterate each of the letters (a, b, c, d, e, etc..) in an Objective-C for

Answer 1

Enumerate substrings of NSString characters with a block

NSString *characters = @"abcdefghijklmnopqrstuvwxyz";
[characters enumerateSubstringsInRange:NSMakeRange(0, characters.length) options:NSStringEnumerationByComposedCharacterSequences usingBlock:^(NSString * _Nullable substring, NSRange substringRange, NSRange enclosingRange, BOOL * _Nonnull stop) {

     NSLog(@"substring: %@ substringRange: %@, enclosingRange %@", substring, NSStringFromRange(substringRange), NSStringFromRange(enclosingRange));

 }];