Background Upload

I am looking for a direction on a background image upload on the iPhone, background meaning in my app while other interface items are processing and views are changing.

I was thinking that there would be a way in the appDelegate to spawn a process to upload the file, then开发者_如何转开发 have a delegate return the status.

Has anyone seen an example of this?

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I plan on using ASIHTTPRequest in my app to handle communications to web servers in the background.