iPhone Loading Screen Question

I am trying to figure out how apps like Convertbot and Appzilla, have loading screens that fad开发者_StackOverflowes away at both ends. I attached a picture because it is hard to explain. Any ideas, suggestion, tutorial. I'd love to implement this into my app.

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It's actually pretty simple. They've got a default graphic (Default.png) that shows the initial screen. Once the application has loaded, the very first view that comes up has the very same graphic, providing a seamless transition between the startup screen and the application. There's a short delay before an animation of some sort within the view opens up the doors and reveals the main navigation.

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There is a wonderful article on Raywenderlich for door opening and closing animation effect like you asked.

The below link explains step by step on how to achieve this.

Click here to see the article.

I hope this helps.