Beginning iOS UI

i ng iO S UI
Beginn plicatio
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ic e iOS a
build a n
How to

Presented by Jack River

Outline
!   What is UI

!   What is different about a mobile device

!   Why is iOS so special

!   Some basic principles

!   UI design in action

What is UI?
!   User Interface

!   User Interface Design

What is UI Design?
!   The process of accomplishing the goals above

!   The act of balancing technical functionality and
visual

!   To create a system that is not only operational
but also usable and adaptable to CHANGING
user needs

Mobile Device vs. PC?
Mobile Device PC
!   Smaller Screen !   Large Screen

!   Touch interfaces !   Mouse & Keyboard

!   Acceleration sensing !   NO Acceleration sensing

!   Orientation awareness !   NO Orientation awareness

!   Pervasive animation !   Almost any animation is possible

!   Simulations of physical behavior !   Few simulations of physical
behavior

iOS?
!   A full design toolkit

!   Inherit & Customize

!   Gesture

!   Different devices:
!   iPhone & iPod Touch
!   iPad
!   …
!   Full animation support and some preset animation

Some Basic Principles
!   MUST be functional

!   KISS

!   Be efficient

!   Focus on the big things

!   Be graphic

!   Show users how to use your app

!   Let users choose whatever they want

Don’t do it!
!   Ignoring performance

!   No interaction

!   No Feedback

!   Massive changes in one move

!   Without consistency

List
!   Screen Size
!   Device Orientation
!   Gesture
!   User Control
!   Animation
!   iPad

Screen Size
!   The comfortable minimum size of tappable UI
elements is 44 x 44 points.

!   The quality of app artwork is very apparent.

!   The user’s focus is on the content.

Screen Size
Device Portrait Landscape
iPhone 4 640 x 960 px 960 x 640 px
iPad 768 x 1024 px 1024 x 768 px
Other devices 320 x 480 px 480 x 320 px

Screen Size
iPhone iPad

A button that has a size of 60 x 60 px

Device Orientation
!   Two orientations:
!   Portrait
!   Landscape
!   Different default orientations of your app:
!   The orientation of Home screen on iPad
!   The portrait orientation on other iOS devices

Gestures
!   Available gestures:
!   Tap
!   Drag
!   Flick
!   Swipe
!   Double tap
!   Pinch
!   Touch and hold
!   Shake

How to Zoom In

Double Tap Zoom Button

Let User Control
!   Two types:
!   Suggest
!   Warn
!   Ways to accomplish:
!   Pop up
!   Defaults can be changed easily

Animation
!   Communicate status

!   Provide useful feedback

!   Enhance the sense of direct manipulation

!   Help people visualize the results of their actions

But
!   Be aware of the performance

!   Be consistent

iPad Consideration
!   Use the screen size wisely

!   Use Split View

!   Use Popover

!   Reduce Full-Screen Transitions

!   Use a segmented control in a toolbar

Popover Full-Screen Transitions

Some iOS Paradigms
!   Controls should look tappable

!   App structure should be clean and easy to
navigate

!   User feedback should be subtle, but clear

Reference
! http://www.ibm.com/developerworks/web/
library/wa-interface/

! http://oleb.net/blog/2011/11/ios5-tech-talk-mark-
kawano-on-ios-user-interface-design/

! http://developer.apple.com/library/ios/
#DOCUMENTATION/UserExperience/
Conceptual/MobileHIG/

The End
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Beginning iOS UI

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