Managment buttons, Functional buttons, Text/media-view fields
Content views, Bars, Temporary views, Controls
Views, Bars, Controls
It's recommendet to use splash screens
It's recommendet to avoid splash screens
Content- or experience-driven
As much as possible, avoid integration status and other relevant feedback information into your UI
Avoid unnecessary alerts
In a content area, always add a button border or background
Avoid associating different actions with the standard gestures
Avoid creating custom gestures that invoke the same actions as the standard gestures
Text should never be smaller than 11 points, even when the user chooses the extra-small text size. For comparison, the body style uses a font size of 17 points at the large size, which is the default text-size setting.
In general, font size and leading values differ by one point per text-size setting. Exceptions to this are the two caption styles, which use the same font size, leading, and tracking at the extra-small, small, and medium settings
At the smallest three text sizes, tracking values are relatively large; at the largest three text sizes, tracking values are relatively tight.
The headline and body styles use the same font size. To distinguish it from the body style, the headline style uses a heavier weight.
Text in a navigation controller uses the same font size that body style text uses for the large setting (specifically, 17 points).
Text always uses either regular or medium weight; it doesn’t use light or bold.
It is better to use light, pure, clean colors
It is better to use bright, contrasting, poisonous colors
Here's an interesting quiz for you.