Change selectedIndex in code, doesn't fire .valueChanged

[hsharghi]

When changing tab index from the code, .valueChanged action won't be sent and the event will not be fired. The .valueChanged event only will be fired when tap has been detected on UILabel.
I'm trying to change the tabs, by swipe gesture to left and right, but since the .valueChanged event is not fired, code that should be run, won't execute.