Apple has made available to all developers iBooks of its iOS human interface Guidelines format, which can be used on both OS X Mavericks and iPad, the guideline developed for Apple iOS apps and all the advantages offered by iBooks bookmarks or browser itself.
An excerpt from the book:
Designing for iOS 7
iOS 7 embodies the following themes:
– Deference. The UI helps users understand and interact with the content, but never competes with it.
– Clarity. Text is legible at every size, icons are precise and lucid, adornments are subtle and appropriate, and a sharpened focus on functionality motivates the design.
– Depth. Visual layers and realistic motion impart vitality and heighten users’ delight and understanding.
Whether you’re redesigning an existing app or creating a new one, consider approaching the job in the way that Apple approached the redesign of the built-in apps:
– First, strip away the UI to expose the app’s core functionality and reaffirm its relevance.
– Next, use the themes of iOS 7 to inform the design of the UI and the user experience. Restore details and embellishments with care and never gratuitously.
– Throughout, be prepared to defy precedent, question assumptions, and let a focus on content and functionality motivate every design decision.