Position a UIView relative to the bottom of the parent view?

Question

How can I align a UIView to the bottom of the parent so that the Y coordinate of the frame is relative to the bottom of the screen instead of the top?

This would be the equivalent to setting the .bottom property in HTML.

This is because I want to make sure my view is always at the bottom of window regardless of the height of the parent.

Solution 1

Once you have initially positioned the view by setting its frame property, adjust its autoresizingMask to include UIViewAutoresizingFlexibleTopMargin. That will keep it anchored to the bottom of its superview.

Solution 2

You can set the autoresizing mask values on the Sizing pane in XIB or Storyboard editor.

Solution 3

This should do the trick

public override void ViewDidLoad()
{
    base.ViewDidLoad();
    bottomButton.Alignment = UIStackViewAlignment.Bottom;          
}

Comments

[Camsoft]

Almost worked, had to set the view's frame Y coordinate to a negative number to pull the view up from the bottom.

[user3344977]

Amazingly simple and still works perfectly in iOS 8.

[Dushi Fdz]

In iOS 8, you can use Auto Layout, which is a much better way of expressing this need, but is way beyond the scope of this answer. :)