问题
As the title indicates I want to add a constraint like with Xcode with the Pin button, but there is no such button in Xamarin Studio. I can't figure out where do I add a height constraint.
With height constraint I mean a constraint like
viewA.height = null * multiplier + constant
i.e. NSLayoutAttribute.NoAttribute should be used!
How can I do that with iOS Designer?
回答1:
You have to left-click once on the heigth/width pin. Then the constraint is created for you with the current frame size.
UPDATE: In current Xamarin, when left-click on "I-bar" pin, you get two choices:
(1) "Width" (or Height), which creates a "Constant Width" (Height) e.g. "Width = 100", and
(2) "Aspect Ratio", which creates a Width-to-Height constraint, e.g. "Width = 1:1 * Height".
来源：https://stackoverflow.com/questions/27172640/how-to-add-a-height-width-constraint-with-ios-designer-in-xamarin-studio