UIStackView:是否真的需要同时调用removeFromSuperView和removeArrangedSubview来删除子视图? [英] UIStackView : Is it really necessary to call both removeFromSuperView and removeArrangedSubview to remove a subview?
问题描述
在removeArrangedSubview中:
In removeArrangedSubview:
为防止在调用堆栈的removeArrangedSubview:方法后视图出现在屏幕上，请通过调用视图的removeFromSuperview方法从子视图数组中明确删除视图.
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.
在organizedSubview中:
In arrangedSubview:
每当调用排列视图的removeFromSuperview方法时，堆栈视图就会将该视图从其splittedSubview数组中删除
Whenever an arranged view’s removeFromSuperview method is called, the stack view removes the view from its arrangedSubview array
从这些看来，仅调用removeFromSuperview就足以删除一个子视图，而我一直在使用它而没有问题.我还通过调用removeFromSuperview时记录了rangingSubviews数组的计数来确认此行为.
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.
但是，这里有许多有关S/O的教程和评论，请说两者都称呼.是否有一个原因?还是人们只是这样做，因为文档中是这样说的?
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?
推荐答案
不，只需调用 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)
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