Feedback · It acknowledges actions and shows results to keep people informed. The built-in iOS apps provide perceptible feedback in response to every user action.
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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.
You look at what One Direction has done and just say, 'That is just lucky;' it is not. It is happening because they are talented boys, good looking lads; and yes, their songs might not be the typical songs that lots of radios want to play, but they are great songs, pop records, that are massive across the world selling in huge numbers.
I think the Brexit vote in Great Britain informing this populist movement of nationalism is kind of a global thing, and I think it's no particular political party's fault. People have been left behind, and in America, we're used to going forward. It's always like we're going to be better; the next generation's going to be better.