UIStackView : Is it really necessary to call both removeFromSuperView and removeArrangedSubview to remove a subview?

ios uistackview
robola picture robola · May 30, 2016 · Viewed 29.8k times · Source

From the UIStackView Class Reference

In removeArrangedSubview:

To prevent the view from appearing on screen after calling the stack’s removeArrangedSubview: method, explicitly remove the view from the subviews array by calling the view’s removeFromSuperview method.

In arrangedSubview:

Whenever an arranged view’s removeFromSuperview method is called, the stack view removes the view from its arrangedSubview array

From these, it seems that calling just removeFromSuperview is enough to remove a subview and I've been using it like that without problems. I also confirmed the behavior by logging the count of the arrangedSubviews array when removeFromSuperview is called.

A lot of tutorials and comments here on S/O however, say to call both. Is there a reason for this? Or do people just do it because the documentation says so?

Answer

zurakach picture zurakach · Feb 20, 2017

No, just call subview.removeFromSuperview() 

/* Removes a subview from the list of arranged subviews without removing it as
 a subview of the receiver.
    To remove the view as a subview, send it -removeFromSuperview as usual;
 the relevant UIStackView will remove it from its arrangedSubviews list
 automatically.
 */
open func removeArrangedSubview(_ view: UIView)

Related questions

Add views in UIStackView programmatically

I'm trying to add views in UIStackView programmatically. For now My code is: UIView *view1 = [[UIView alloc]init]; view1.backgroundColor = [UIColor blackColor]; [view1 setFrame:CGRectMake(0, 0, 100, 100)]; UIView *view2 = [[UIView alloc]init]; view2.backgroundColor = [UIColor greenColor]; [view2 setFrame:CGRectMake(0, 100, 100, 100)]; [self.stack1 addArrangedSubview:…

Read More
Is it possible for UIStackView to scroll?

Let's say I have added more views in UIStackView which can be displayed, how I can make the UIStackView scroll?

Read More
How to add leading padding to view added inside an UIStackView

This is my setup: I have an UIScrollView with leading,top, trialing edge set to 0. Inside this I add an UIStackView with this constraints: stackView.centerYAnchor.constraintEqualToAnchor(selectedContactsScrollView.centerYAnchor).active = true stackView.leadingAnchor.constraintEqualToAnchor(selectedContactsScrollView.leadingAnchor).active = true Inside the …

Read More