Deference · Fluid motion and a crisp, beautiful interface help people understand and interact with content while never competing with it. Content typically fills the entire screen, while translucency and blurring often hint at more.
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Depth · Distinct visual layers and realistic motion convey hierarchy, impart vitality, and facilitate understanding. Touch and discoverability heighten delight and enable access to functionality and additional content without losing context. Transitions provide a sense of depth as you navigate through content.
Direct Manipulation · The direct manipulation of onscreen content engages people and facilitates understanding. Users experience direct manipulation when they rotate the device or use gestures to affect onscreen content. Through direct manipulation, they can see the immediate, visible results of their actions.
User Control · Throughout iOS, people—not apps—are in control. An app can suggest a course of action or warn about dangerous consequences, but it’s usually a mistake for the app to take over the decision-making. The best apps find the correct balance between enabling users and avoiding unwanted outcomes.
Since I was a little girl, I have witnessed the strength and courage that energized my mother, who left every sorrow and pain in the past, who would work unyieldingly to obtain her goals, who was the great warrior from whom I learned all the values that are today fundamental pillars of my every day.
When Jennifer Roberson and Kate Elliott and I were noodling up 'The Golden Key,' we had pages upon pages upon pages of notes about everything to do with our little universe. Much of this material was used; the rest was there if we needed it. But it all had to be consistent within itself and adhere to its own logic.