How to show Calendar in IPhone app source as iCal (.ics)file

I am planning to create an iPhone application which displays tasks in calendar view with sort options Day, Week and Month view.

Thos开发者_如何学JAVAe tasks comes from .ics file which will be in web site (server).

is it, We have to read that .ics file using our code and connect those tasks to calendar or we can directly set .ics file as a source.

Please give me ideas to create this application, thanks