How to launch an iPhone application

I know launch an applica开发者_开发问答tion may via touch ico on the desktop. And is it start by its plistfile? Is there any other way to launch app?

Register a "protocol" for your application and the iPhone OS will automatically execute your application when a link with that protocol is clicked. For instance all links with "http://" (http protocol) at the start of the link will execute the Safari browser. Links starting with "fb://" will start the Facebook application etc.

Use your own custom URL scheme:

Guide

It's located in the .plist file (if the application has it)

There is no public API to launch arbitrary applications. You can launch applications that have registered for a custom URL scheme like explained in another answer.