Extract pattern substring from NSString

I've created my own UITabBarController.

Additionally I've written a few lines of code to determine the current user.

E.g. if I am the current user do/display this, otherwise do/display this etc...

The format pattern is (firstname Lastnam开发者_开发知识库e).

The Full name of the current user is in "displayName".

This is how I set the title of the tab depending on whether I am looking at 'my' tabs or someone else's tabs.

[activities setTitle:[viewingUser objectForKey:@"displayName"]];

I now want to extract only the firstname and display it like so:

"firstname's".

I do know of substringToIndex and substringWithRange but I just can't seem to work it out myself. I reckon I just need to find the first and extract the part it togehter with that ['s]. Can anybody please point me in the right direction?

Cheers

If first name and last name are separated by a space then simply execute the following statement which returns an NSArray which in your will contain the first and last names.

[displayName componentsSeparatedByString:@" "]

Take a look at the NSScanner documentation and associated sample code. There are simpler ways to do it if that is your only dataset, however, the moment you start getting into even semi-complex sequences, you'll need other, more powerful solutions. This is why I'm recommending NSScanner off the top.