What happens when an UIView is added to another UIView twice in IOS?

Question

What happens when an UIView is added to another view twice in iOS? I believe it wont get added twice. Have anyone ever tried?

Answer 1

[UIView addSubview:] documentation

Views can have only one superview. If view already has a superview and that view is not the receiver, this method removes the previous superview before making the receiver its new superview.

Answer 2

A view can only have one parent view. But a view can have many subviews.

Read the Documentation of UIView.

Specifically read about addSubView