Ciao a tutti!

Programmando applicazioni iPhone e iPad in Objective-C, una classe che si usa davvero con molta frequenza è 'UIAlertView'.
Oggetti di questo tipo sono rappresentati visivamente dai tipici 'pop-up' informativi che compaiono durante l'esecuzione di una app per comunicare all'utente messaggi di vario tipo (per esempio che è avvenuto un errore, la tipologia di errore, ecc). 

Hello!

Speaking about Objective-C programming for iPhone and iPad apps, I am quite sure that you, at some point, have needed to use some kind of interaction with pins on maps to open, for instance, detail views showing further information about the selected geographical points (galleries of images, descriptions, whatever you like).

Suppose to get some data from external sources (XML, '.plist' files, and so on), or just to have some text managed by Objective-C variables (populated not necessarily with external data).

Moreover, suppose that some of this data has to be visualized in textual areas in the Objective-C application you have been developing.

Quite soon, you realize that one of the first thing you need to master is the 'line breaks' management.
That is, it is very important to know how to have your text in a new line when required. For instance when it comes to create a new paragraph, after the end of a sentence and so on.