Before Getting Started: Make sure you are equipped with the right systems because it is necessary to have a Mac to start designing iOS applications. X Code –Open the Mac App Store app on your Mac, search for Xcode, and click Free to download Xcode. When you download Xcode, the iOS SDK is included which will guide you while designing the app. iOS App Development Tools..

1. iPhone Application
Development Tools
Professionally design an iPhone application

2. Before getting Started!
 Make sure you are equipped with the right systems because
it is necessary to have a Mac to start designing iOS
applications.
 X Code –Open the Mac App Store app on your Mac, search
for Xcode, and click Free to download Xcode. When you
download Xcode, the iOS SDK is included which will guide
you while designing the app.

3. Preparing Graphics
• All iOS applications have 3 possible pixel
densities
o Standard 640 x 960 pixels
o Standard 320 × 480 pixels
o Retina 640 × 1136 pixels
• Use PNG image formats because of its support for
alpha-transparency and its lossless compression.
• Every pair of images that you make will need a
unique and descriptive file name, because they
are all stored in the same directory in the app
bundle.

4. The Xcode
Xcode provides tools to manage your entire development
workflow, from creating your app and designing your user
interface, to testing, optimizing, and forwarding your app to the
App Store.
You can customize Xcode to suit your style of working, Xcode
can be used:
 To test and debug your source code and
 To analyze and improve your app’s performance
 To perform source control operations archive
 To submit your app to the App Store, and more

5. The Language
 Objective-C is an object-oriented language that rules all iOS
apps. It is the main programming language used by
Apple for the OS X and iOS operating systems
 Objective-C is a simple language with syntax and
conventions that are easy to learn. If you’re a C programmer,
your apps will be easier to design and modify once you are
familiar with object-oriented programming and Objective-C
Read also: http://cocoadevcentral.com/d/learn_objectivec/

6. BASICS
 Now that you are familiar with Objective-C, to create an iOS app, you
need to know how to create objects, compare objects, and access
objects in collections such as arrays.
These tasks are common in iOS apps. After you acquire these skills, you
are ready to take on more complicated Objective-C code.

7. FRAMEWORK
An app consists of code that you write and frameworks
provided to you.
 Any app that you develop will link to multiple
frameworks. You can take advantage of a framework
through its application programming interface (API).
The API, published in header files, specifies the
available classes, data structures, and protocols. You
should use frameworks both to save time and effort
and to make sure your code is efficient and secure.
The system frameworks are the only way to access the
underlying hardware.

8. Tip:
Design Pattern Patterns are abstract designs, not code.
When you adopt a design, you adapt the general pattern to your
specific needs.
Understanding the design patterns will help you to use
frameworks more effectively and allows you to write programs
that are more reusable, more extensible, and easier to change.

9. UI – User Interface Design
It’s not enough to create an app that just works.
 iOS apps are expected to be spontaneous, interactive, and
engaging. Think about the user experience as you design every
part of your app, from the features you choose to the way your
app responds.
 users might not be aware of human interface design
principles, but they can tell when apps follow the guidelines and
when they don't.
Follow the principles and conventions to design a superlative user
interface and user experience for your product.

10. Designing the App
Design decisions help you to construct the architecture of your app.
Before you begin writing a line of code, you should make some critical
design decisions,
 Be as specific as possible about your app’s purpose and features.
 Choose the kind of data model your app will use.
 Decide on a user interface style for your app; for example, should it
follow a master-detail pattern or that of a utility app? Do you want
your app to be universal—that is, an app that runs on
iPad, iPhone, and iPod touch?

11. Before you work on the architecture, you
need to be familiar with the Cocoa Touch
frameworks.
Get to know the framework objects that implement
the basic structure of an app, that serve as the
building blocks of your data model.

12. The App Store
Things you must do to publish an app on the App Store:
 To make a great app, you need to test it on actual devices
throughout the development process, not just in Simulator.
 To run an app on iOS-based devices, you need to register
the devices you want to test on, create certificates that
authorize developers to sign an app, and create an app ID to
identify the app.
 After you test and refine your app, you need to submit it
through iTunes Connect. Your app must be approved by App
Store reviewers before it’s published.

13. For Further Guidance have a look at
http://www.makeuseof.com/tag/develop-simple-iphone-app-
submit-itunes/

14. Thank You
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