How do I pass data from a tab bar controller to one of its tabs?

How do I pass data from a tab bar controller to one of its tabs?

Switching to a TabBar tab view programmatically?

Switching to a TabBar tab view programmatically?

Tab Bar covers TableView cells in iOS7

Tab Bar covers TableView cells in iOS7

Swift: Create Facebook’s Image Zooming Animation using Core Animation

my review point is 8/10

https://youtu.be/kzdI2aiTX4k?t=29m45s   navigation bar를 덮는 view 만들어 적용하기 

https://youtu.be/kzdI2aiTX4k?t=32m25s   tab bar를 덮는 view를 만들적용하기