APPLE HUMAN GUIDELINES

TabBar in Apple Human Guidelines

Rules: Use a tab bar only to enable navigation, not help people perform actions. If you want perform action then you should use toolbar. Make sure the tab bar is visible when people navigate to different areas in your...

Navigation Bar design guideline

Navigation bars A navigation bar appears at the top of an app screen, enabling navigation through a hierarchy of content. Use the title area to describe the current screen if it provides useful context. Write a ...