XLPagerTabStrip: Dynamically adding subviews to tab's view controllers wouldn't display except under first tab.
Please download the project and run it to see the problem:
https://github.com/farhan101/TheProblemView
First Tab: Under View One tab you can see a spinner added dynamically
Second Tab: Under View Two tab same spinner is added but it wouldn't show
PS: As you can see in the source code, both view controllers are instances of the same view controller class.