自动布局约束:如何使视图在调整大小时保持其宽度/高度比? [英] Auto-Layout Constraint: How to make a view maintains its width/height ratio when resized?

问题描述

在界面构建器中，我们可以固定高度、固定宽度，使两个视图的宽度相等，但是如何设置约束，以便在调整视图大小时，它保持其宽度/高度比?

In the interface builder we can pin height, pin width, make two views width equally, but how do I set the constraints so that when a view is being resized, it maintains its width/height ratio?

在我的特殊情况下，我的视图控制器中有一个 UIImageView.当视图调整大小时，我希望我的图像视图调整大小，但保持 3:2 的宽度:高度比.是否可以在 IB 中完成?用代码可以吗?

In my particular case, I have an UIImageView in my view controller. When the view resizes, I'd like my image view to resize, but maintain a 3:2 width:height ratio. Is it possible to do it in IB? Is it possible to do it with code?

谢谢！

推荐答案

您可以在 IB 中通过控件从视图拖动到自身并选择纵横比来添加纵横比约束.

You can add an aspect ratio constraint in IB by control dragging from the view to itself and choosing aspect ratio.

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