Gestures in iOS
The first 5 seconds of a users interaction with an app are the most important. They are the building blocks and show the user how to use the app.

Simple gestures become second nature like tapping and swiping.

The tap –  gesture is the most common and simplest gesture. The standard area for a simple touch on a screen is a 44 by 44 pixel area.
The drag – is used mainly for scrolling or moving objects like apps.
The flick – is designed for a less direct movement.
The swipe – allows the user to access hidden, touch heavy elements.
The pinch – can be used to scale images or objects.


UI – iOS anatomy
iOS has guidelines or requirements for designing you app. Almost all iOS apps use similar toolkit features in their apps such as navigation bars, tab bars, toolbar buttons, segmented controls, map view and alerts. These features fall into 4 main categories – Bars, Content views, Controls, Temporary views. iOS have different keyboard types depending on the context off the app. Such as for entering a phone number, the numbered keyboard will display, typing an email will prompt the keyboard to have the ‘@’ key accessible without having to dig into menus to find it.


Summary

Knowing the device your developing for is very important. Without knowing common gestures, UI styles and the anatomy of the device, the app your developing will look odd in the chosen device market.

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