Quick now: How do you correctly find the length of a string containing odd characters like emoji? And how can you be certain you’re comparing strings with combining characters for visible equivalence correctly? If the answers don’t spring to mind, check out NSString and Unicode.
How do you correctly, i.e. locale-aware, join a list of items for text display? That’s one of the many tidbits in Working with Strings.
No doubt you know how to use localized .strings … but did you know in iOS 7+ you can do locale-aware plurals with .stringdict files? And do you know how to correctly display a localized file name? See String Localization.
Need to validate your input? Or have a full expression grammar? Check out String Parsing.
Finally, know how to calculate bounding rects for attributed strings in the new non-deprecated iOS 7 way? And how to lay out hanging indents for lists and decimal-aligned number tables with Text Kit? If not, here’s String Rendering to get you up to speed.
Haven’t seen a developer periodical this consistently high quality through issue #9 since … well, ever, actually … so we strongly encourage you all to subscribe with their app to keep the goodies coming!
Extending “strings” to include “text” — Open Source Library And Editor Tool For Easily Formatting Text Within Your Apps