/// <summary>
/// <para>Constrains the layout of subviews according to equations and
/// inequalities specified in <paramref name="constraints"/>. Issue
/// multiple constraints per call using the && operator.</para>
/// <para>e.g. button.Frame.Left >= text.Frame.Right + 22 &&
/// button.Frame.Width == View.Frame.Width * 0.42f</para>
/// </summary>
/// <param name="view">The superview laying out the referenced subviews.</param>
/// <param name="constraints">Constraint equations and inequalities.</param>
/// <param name = "priority">The priority of the constraints</param>
public static NSLayoutConstraint[] ConstrainLayout (this UIView view, Expression<Func<bool>> constraints, UILayoutPriority priority)
{
var body = constraints.Body;
var exprs = new List<BinaryExpression> ();
FindConstraints (body, exprs);
var layoutConstraints = exprs.Select (e => CompileConstraint (e, view)).ToArray ();
if (layoutConstraints.Length > 0) {
foreach (var c in layoutConstraints) {
c.Priority = (float)priority;
}
view.AddConstraints (layoutConstraints);
}
return layoutConstraints;
}
public FluentLayout SetPriority(UILayoutPriority priority)
{
Priority = (float)priority;
return this;
}
public FluentLayout SetPriority(UILayoutPriority priority)
{
Priority = (float)priority;
return(this);
}
/// <summary>
/// <para>Constrains the layout of subviews according to equations and
/// inequalities specified in <paramref name="constraints"/>. Issue
/// multiple constraints per call using the && operator.</para>
/// <para>e.g. button.Frame.Left >= text.Frame.Right + 22 &&
/// button.Frame.Width == View.Frame.Width * 0.42f</para>
/// </summary>
/// <param name="view">The superview laying out the referenced subviews.</param>
/// <param name="constraints">Constraint equations and inequalities.</param>
/// <param name = "priority">The priority of the constraints</param>
public static NSLayoutConstraint[] ConstrainLayout(this UIView view, Expression <Func <bool> > constraints, UILayoutPriority priority)
{
var body = constraints.Body;
var exprs = new List <BinaryExpression>();
FindConstraints(body, exprs);
var layoutConstraints = exprs.Select(e => CompileConstraint(e, view)).ToArray();
if (layoutConstraints.Length > 0)
{
foreach (var c in layoutConstraints)
{
c.Priority = (float)priority;
}
view.AddConstraints(layoutConstraints);
}
return(layoutConstraints);
}
/// <summary>
/// Sets the resistance to expansion beyond the UIKit.UIView's UIKit.UIView.IntrinsicContentSize.
/// </summary>
public static TView WithContentHuggingPriority <TView>(this TView view, UILayoutPriority priority, UILayoutConstraintAxis axis) where TView : UIView
{
view.SetContentHuggingPriority((float)priority, axis);
return(view);
}
public static NSLayoutConstraint WithPriority(this NSLayoutConstraint constraint, UILayoutPriority priority)
{
if (constraint == null)
{
throw new ArgumentNullException(nameof(constraint));
}
return(WithPriority(constraint, (float)priority));
}
/// <summary>
/// Sets the content compression resistance priority.
/// </summary>
/// <param name="view">View.</param>
/// <param name="priority">Priority.</param>
/// <param name="axis">Axis.</param>
public static void SetContentCompressionResistancePriority(this UIView view, UILayoutPriority priority, UILayoutConstraintAxis axis)
{
view.SetContentCompressionResistancePriority((float)priority, axis);
}
/// <summary>
/// Sets the content hugging priority.
/// </summary>
/// <param name="view">View.</param>
/// <param name="priority">Priority.</param>
/// <param name="axis">Axis.</param>
public static void SetContentHuggingPriority(this UIView view, UILayoutPriority priority, UILayoutConstraintAxis axis)
{
view.SetContentHuggingPriority((float)priority, axis);
}
public LayoutPriority(UILayoutPriority value)
{
_value = (float)value;
}