special characters [second time]

You can insert any Unicode character you want. Under the "Edit" menu while in Xcode or IB (or just about any app on the Mac) select "Special Characters". Find what you need and insert it into the label's text.

A follow up: how about superscript or subscript in a label or UITextView? Would like to avoid having to turn to a webview. Thanks

There's no way to format the text in a UILabel or UITextView, but note that there are superscript and subscript numbers available as special characters in Unicode, if that's what you're looking to do.

What subscripts or superscripts? Some can be found as Unicode characters such as the '2' for squared.

But for general text drawn as a super/subscript you could use multiple labels setting the right position and font for each. Depending on what you are doing that may be easier than using a web view.

Am seeking a solution for something like footnotes or chemical names. I believe the unicode characters do not include all digits. Additional labels would not be as practical for dealing with instances in larger blocks of text, so I guess it will have to be html for now. A shame...

Thanks

Open a program that has an edit menu, like TextEdit. Click Edit -> Special Characters. Make sure at the top you have "View: All Characters" and "by Category" tab selected. Look in the left panel under "Symbols" then "Numbers and Number Symbols". Scroll down to find super- and sub-script digits (0-9). Hover your mouse over one to find the UTF8 code. For example, subscript-0 is "E2 82 80".

To use it in code, do something like this:

NSString *sub0 = @"₀";

Another note: do not put UTF8 characters directly into your code. Always use an escaped string like I wrote above.

You can also store a single character (as unicode) like this:

unichar sub2 = 0x2082;

Can you explain your statement. I've inserted some special characters (like the Trademark symbol) into a string in an iPhone app. It's in the store right now and works fine. It is a lot easier to read:

"Easy String™" than it is to read "Easy String\xE2\x84\xA2"

I'm simply referencing the Apple documentation:
Strings and Non-ASCII Characters

"It is not safe to include high-bit characters in your source code"

I think it's probably to avoid problems when editing code on multiple machines or different editors. ASCII is universal, but multibyte chars have the potential to be corrupted if they are directly in your code and you use an editor that doesn't support them.

Fair enough. Good caution.

Thanks, that was exactly what I needed.