
The iOS camera shutter animation “offsets the user’s perceived time passage.”. The iOS onscreen keyboard doesn’t overlap with buttons or elements on the screen above.
For example, in the Safari browser, the Add Bookmark function is disabled until the page successfully loads. When you can’t or shouldn’t do something, the control becomes unusable.
Can’t place duplicate menus on the home screen, which prevents user confusion. Dynamic effects add “fun factor.” For example, flipping pages in the Notepad app, rising and falling focused brightness on buttons that are tapped to provide visual feedback,. Double-tapping on a segment of something - say, a column on a page in the Safari browser - perfectly sizes that segment for easy reading.
When you press and hold on text in the iOS, a magnifying glass shows an enlarged view, making it easier to move the cursor.