title: How to work with auto layout concept in ios
body: <p>Create one app for iphone 4 inch screen in Xcode 6.1.1  develop one page successfully and run properly in iPhone 5s. and run iPhone 6 and 6+. its show the white empty page for iPhone 6 for extra height and width. how can support for all the screen in that same code.help me new for develpoment..</p>