ARTICLE
How to Change Background Color in iPhone and iPad
In this article I will explain the procedure of changing the background color of a window in iPhone or iPad.
Introduction
In this article we change the background color of a UI Window of iPhone via coding in the appdelegate.m class. To better understand use the following procedure.
Step 1
Open XCode by double-clicking on it.

Step 2
Create a New XCode Project by clicking on it.

Step 3
Now select Empty Application and click on Next.

Step 4
Now give your Product Name. Here I give Background and Click on Next.

Step 5
Select the location you want to save your project to and click on Create.

Step 6
Now you will see only two Objective-C Classes which were automatically generated by XCode. In the Empty Application never generate a UIViewController class; if you want, you can create it manually.
1.Appdelegate.h
2.AppDelegate.m
Here we write code....
Appdelegate.h

Appdelegate.m

Here is the code where we change the color:

Step 7
Now select in which Platform you want to see the output.

Output
Output 1 in iPhone:

Output 2 in iPhone:

Output 1 in iPad:

Output 2 in iPad:
