For Loop traversal nsstring

Version 1:

    NSString *hello = @"hello world";        for (int i = 0 ; i < hello.length; i ++) {        unichar charactor = [hello characterAtIndex:i];        NSLog(@"%C",charactor);    }

The above method contains some characters such ???? It is not applicable when it is in the string.

 

Available version: rangeofcomposedcharactersequenceatindex: can get the full word range

Nsstring is UTF-16 encoded (? Are you sure you want to?), but some characters must be 2 to 16 characters

    NSRange range;    for (int i = 0; i < hello.length ; i += range.length ) {        unichar chara = [hello characterAtIndex:i];        range = [hello rangeOfComposedCharacterSequenceAtIndex:i];        NSString *subStr = [hello substringWithRange:range];        NSLog(@"%@ %@",subStr,NSStringFromRange(range));    }

 

For Loop traversal nsstring