Vertical UIStackView alignment - ios

Question

I have a vertical UIStackview with 3 controls in it.
I want all the controls to be centered, and the first two to expand the whole width available. The third one should take 80% of the available width and be centered as well.
Here is the result I got so far:
As you can see the third control is left aligned.
Here is the code I have for all of this:
var container = new UIStackView
{
TranslatesAutoresizingMaskIntoConstraints = false,
Axis = UILayoutConstraintAxis.Vertical,
Distribution = UIStackViewDistribution.EqualCentering,
Alignment = UIStackViewAlignment.Fill,
Spacing = 10f
};
// Create the Title
UILabel title = new UILabel
{
TranslatesAutoresizingMaskIntoConstraints = false,
Text = item.name,
TextAlignment = UITextAlignment.Center,
Lines = 2,
};
container.AddArrangedSubview(title);
// Create the gauge
SFCircularGauge circularGauge = new SFCircularGauge { TranslatesAutoresizingMaskIntoConstraints = false };
circularGauge.Tag = circularGauge.GenerateViewTag();
circularGauge.HeightAnchor.ConstraintEqualTo(100f).Active = true;
#if DEBUG
circularGauge.BackgroundColor = UIColor.Cyan;
#endif
container.AddArrangedSubview(circularGauge);
// Add the evaluate button
var evaluate = UIButton.FromType(UIButtonType.RoundedRect);
evaluate.TranslatesAutoresizingMaskIntoConstraints = false;
evaluate.SetTitle(Utilities.GetLocalizedString("qol_rate_button_text"), UIControlState.Normal);
evaluate.SetTitleColor(UIColor.White, UIControlState.Normal);
evaluate.BackgroundColor = new UIColor(red: 1.00f, green: 0.37f, blue: 0.00f, alpha: 1.0f); // Optimistic Orange
evaluate.Layer.CornerRadius = 5f;
evaluate.AutoresizingMask = UIViewAutoresizing.FlexibleWidth;
evaluate.ContentEdgeInsets = new UIEdgeInsets(top: 0, left: 10f, bottom: 0, right: 10f);
evaluate.UserInteractionEnabled = true;
evaluate.TouchUpInside -= Evaluate_TouchUpInside;
evaluate.TouchUpInside += Evaluate_TouchUpInside;
evaluate.Tag = evaluate.GenerateViewTag();
viewIdsAutoEvalsIds.Add((int)evaluate.Tag, item.id);
container.AddArrangedSubview(evaluate);
evaluate.WidthAnchor.ConstraintEqualTo(container.WidthAnchor, 0.8f).Active = true;
evaluate.CenterXAnchor.ConstraintEqualTo(container.CenterXAnchor).Active = true;
I can't figure out where is my problem. In the UIStackView configuration? Somewhere else?
Thanks in advance.

Answer 1

The property Alignment is to sets the alignment of the non-axial subviews . In your case , you need to set it as
UIStackViewAlignment.Center
instead of
UIStackViewAlignment.Fill

Answer 2

This might be a bug of the control. We'll see.
In the meantime, thanks again to the Reveal Tool, the gauge has no width defined.
I solved the problem by setting the width constraint explicitly:
// Fix the width to be 100% of the container
circularGauge.WidthAnchor.ConstraintEqualTo(container.WidthAnchor).Active = true;