creating iphone app for existing site. need advice about the data I'm downloading

I'm building an iPhone app for existing site (a local news site)

Main page with articles headers, when click on them you move to the article page. Simple.

This is the first time I'm building such type of app.

I have 3 general questions, just to make sure :

1. For the iphone, Do we need to re-create the website开发者_运维知识库 article's pictures for the iphone ? or there is some programming tool that on the fly make the files looks better on the iphone ? or maybe, there is some technique that creates one artice picture that looks right both for the server and the iphone ?
2. Usually, Do you need to create special data channels from the iPhone webservice ? or programmers just use the existing rss channels of the webserver ?
3. If someone know nice artice about this stuff, It will help a lot. just see what other are doing.

thanks.

You can see the intent Media apps, these apps are working like what you want your app to.

1) You're better off creating mobile versions of the images. You can do image processing on the iPhone, but you'll have to have the original and that makes the whole thing pointless (ie. you have to download the whole thing.) Generate a mobile thumbnail when those are uploaded on the server.

2) RSS will do. There's a very good tutorial at cocoadevblog.com about approaching such a task (I guess this covers 75% of the work you have to do)

3) Check 2) ;-)

if your download image is bigger the the thumbnail you are trying to display, then the problem is in your code that change the image size. check carefully what are you doing to the image after downloading it.

I would recommend to create square thumbnails of your pictures at the server level. This will allow you to easily position in the iPhone screen, plus you will not need to download the whole image from the server.

nnahum