iPhone - At user event create objects in the view

I am new to iPhone programming, so I think part of the problem is that I don't know what I really want to google to find my answer. I am looking for a method that allows a user to draw a line on the screen. There is no guarantee that it will be straight, it can be curved or whatever. I was thinking that I could create some small square image, and then as they draw, place them into a NSset. But I am not really sure how to communicate each new object up to the view. Up to this point, I've just been messing around with objects I put on the view and then assign movement to those, this is my first jump into on-the-fly object creation.

It might be that I just need to jump into a class/object type or even a tutorial, any guidance w开发者_运维技巧ould be great.

Thanks!

Are you asking how to create a 'paint' type application? There's an apple example for that:

http://developer.apple.com/iphone/library/samplecode/GLPaint/Introduction/Intro.html

This question is relevant, but might be too complex when you're just starting out:

Improving Finger Painting Performance

If you're a bit more specific about what problem your app is to solve you might get some more specific answers.