How to add Equal Spacing and equal width for button in iOS Auto layout

Question

Am new to Auto layout constraints in Xcode. I have one Bottom View like UITabBar with 6 UIButtons. Without constraints I aligned those buttons with

Answer 1

iOS 9 has a new UIKit class called UIStackView. It is very helpful in stacking up views horizontally or vertically, like the way you want. You should check out this tutorial: Raywenderlich: UIStackView Tutorial