当另一个按钮被隐藏时使一个按钮居中的约束

Constraints for Centering One Button When the Other Is Hidden(当另一个按钮被隐藏时使一个按钮居中的约束)

问题描述

我在视图控制器上有两个按钮.它们的高度和宽度相等，并且间距很好，在屏幕上居中.问题是在某些情况下，其中一个按钮是隐藏的.当其中一个按钮被隐藏时，我希望另一个按钮居中.

I have two buttons on a view controller. They are equal in height and width and spaced nicely, centered on the screen. The problem is that in some circumstances, one of the buttons is hidden. When one of the buttons is hidden, I want the other button to be centered.

在我的一生中，我一直无法弄清楚如何配置约束来实现这一点.

For the life of me I haven't been able to figure out how to configure the constraints to get this to happen.

我可以移动可见按钮，以便在隐藏另一个按钮时它居中，但似乎只能在加载视图后执行此操作，这会使按钮跳转"而且看起来很傻.

I am able to move the visible button so that it is centered if the other button is hidden, but can only seem to do this after the view is loaded, which makes the button "jump" and looks silly.

推荐答案

在 UIStackView 中嵌入两个按钮:

Embed both buttons within a UIStackView:

并根据您的需要调整其设置:

and adjust its settings to your needs:

button1 隐藏的结果 == false(未勾选):

Result with button1 hidden == false (un-ticked):

button1 隐藏的结果 == true(勾选):

Result with button1 hidden == true (ticked):

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