public override void ViewDidLoad()
{
base.ViewDidLoad();
Title = "Animation";
var box1 = new UIView {
BackgroundColor = UIColor.FromRGB(250, 250, 250)
};
var box2 = new UIView {
BackgroundColor = UIColor.FromRGB(10, 10, 10)
};
var box3 = new UIView {
BackgroundColor = UIColor.FromRGB(240, 240, 240)
};
var box4 = new UIView {
BackgroundColor = UIColor.FromRGB(240, 240, 240)
};
// set constraints as usual
ConstraintHelper
.Attach(box1)
.Top().Left().Right().Height(1f)
.Attach(box2)
.Width(10f).Height(10f).Center().Middle()
.Attach(box3)
.Top(20f).Left().Height(40f).Width(0f)
.Attach(box4)
.Bottom(20f).Right().Height(40f).Width(0f)
// layout constraints (equal to LayoutIfNeeded)
.UpdateConstraints();
UIView.Animate(0.8, 0, UIViewAnimationOptions.CurveEaseOut,
() => {
box1.BackgroundColor = UIColor.FromRGB(10, 10, 10);
box2.BackgroundColor = UIColor.FromRGB(128, 128, 128);
box2.Layer.CornerRadius = 75f;
// change the constraints
ConstraintHelper
.WorkWith(box1)
.RemoveHeightConstraint().HeightOfParent(0.5f)
.WorkWith(box2)
.RemoveWidthConstraint().Width(150f)
.RemoveHeightConstraint().Height(150f)
.WorkWith(box3)
.RemoveWidthConstraint().WidthOfParent(0.8f)
.WorkWith(box4)
.RemoveWidthConstraint().WidthOfParent(0.8f)
// layout constraints again (equal to LayoutIfNeeded)
.UpdateConstraints();
}, null
);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
Title = "Sizing";
var box1 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 180, 100)
};
var box2 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 180, 150)
};
var box3 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 180, 200)
};
var box4 = new UIView {
BackgroundColor = UIColor.FromRGB(140, 140, 140)
};
var box5 = new UIView {
BackgroundColor = UIColor.FromRGB(160, 160, 160)
};
var box6 = new UIView {
BackgroundColor = UIColor.FromRGB(180, 180, 180)
};
ConstraintHelper
.Attach(box1)
.Width(80f).Height(100f) // setting size by fixed values
.Top().Left()
.Attach(box2)
.WidthOf(box1).HeightOf(box1) // setting size to the same of another element
.Top().LeftOf(box1)
.Attach(box3)
.WidthOf(box2, 2f).HeightOf(box2) // setting size to the same of another element with modifier
.Top().LeftOf(box2).StackTop()
.Attach(box4)
.WidthOfParent(0.25f) // setting sizes of parent containers with modifier
.HeightFromWidth() // use views height as width
.Top().Left()
.Attach(box5)
.WidthOfParent(0.5f)
.HeightFromWidth() // use views width as height
.Top().LeftOf(box4)
.Attach(box6)
.HeightOf(box4)
.WidthFromHeight()
.Top().Right();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
Title = "Stacking";
int amount = 15;
int max = amount * amount;
int color = 255;
int colorSteps = (int)Math.Floor((double)(255 / max));
// In this case we work with as scrollview
_scrollview = new UIScrollView();
ConstraintHelper.Attach(_scrollview).Top().Right().Bottom().Left();
// We get us a new constraint helper to work with the scroll view as parent
var scrollViewConstraintHelper = new ConstraintHelper(_scrollview);
// Stacking makes it easier to position elements around each other without needing them to know
// it works exactly the same way as AboveOf, BelowOf, LeftOf and RightOf
for (int i = 1; i < max + 1; i++)
{
scrollViewConstraintHelper
.Attach(new UIView {
BackgroundColor = UIColor.FromRGB(color, color, color)
})
.WidthOfParent((float)1 / amount)
.HeightFromWidth()
.Top()
.Left()
.StackLeft(); // makes next call of Left behave like LeftOf currrent item
if (i % amount == 0)
{
scrollViewConstraintHelper
.StackTop() // makes next call of Top behave like LeftOf currrent item
.ResetLeftStack(); // afterwards Left will position according to parents left
}
color -= colorSteps;
}
// Since we use a scroll view, it is important to set a bottom constraint
// for the last element otherwise scrolling will not work
scrollViewConstraintHelper.Bottom(); // we still work on the last attached element
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
Title = "Examples";
_buttonSizing = new AutoRoundButton("Sizing")
{
BackgroundColor = UIColor.FromRGB(210, 210, 210)
};
_buttonPositioning = new AutoRoundButton("Positioning")
{
BackgroundColor = UIColor.FromRGB(180, 180, 180)
};
_buttonStacking = new AutoRoundButton("Stacking")
{
BackgroundColor = UIColor.FromRGB(150, 150, 150)
};
_buttonMargin = new AutoRoundButton("Margin")
{
BackgroundColor = UIColor.FromRGB(120, 120, 120)
};
_buttonAnimation = new AutoRoundButton("Animation")
{
BackgroundColor = UIColor.FromRGB(90, 90, 90)
};
ConstraintHelper
.Attach(_buttonSizing)
.Top(5f).Center(-50f).HeightFromWidth()
.Attach(_buttonPositioning)
.Top(5f).Center(50f).HeightFromWidth().StackTop()
.Attach(_buttonStacking)
.Top(-32).Center(-42).HeightFromWidth()
.Attach(_buttonMargin)
.Top(10f).Center(42f).HeightFromWidth().StackTop()
.Attach(_buttonAnimation)
.Top(-18).Center(-25f).HeightFromWidth().StackTop();
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
Title = "Positioning";
var box1 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 100, 100)
};
var box2 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 100, 100)
};
var box3 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 100, 100)
};
var box4 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 100, 100)
};
var box5 = new UIView {
BackgroundColor = UIColor.FromRGB(100, 100, 100)
};
var box6 = new UIView {
BackgroundColor = UIColor.FromRGB(130, 190, 80)
};
var box7 = new UIView {
BackgroundColor = UIColor.FromRGB(130, 190, 80)
};
var box8 = new UIView {
BackgroundColor = UIColor.FromRGB(130, 190, 80)
};
var box9 = new UIView {
BackgroundColor = UIColor.FromRGB(130, 190, 80)
};
var box10 = new UIView {
BackgroundColor = UIColor.FromRGB(0, 100, 250)
};
var box11 = new UIView {
BackgroundColor = UIColor.FromRGB(0, 100, 250)
};
var box12 = new UIView {
BackgroundColor = UIColor.FromRGB(0, 100, 250)
};
var box13 = new UIView {
BackgroundColor = UIColor.FromRGB(0, 100, 250)
};
ConstraintHelper
.Attach(box1)
.Top() // position to the top of the parent view
.Left() // position to the left of the parent view
.Width(50f).Height(50f)
.Attach(box2)
.Bottom() // position to the bottom of the parent view
.Left() // position to the left of the parent view
.Width(50f).Height(50f)
.Attach(box3)
.Top() // position to the top of the parent view
.Right() // position to the right of the parent view
.Width(50f).Height(50f)
.Attach(box4)
.Bottom() // position to the bottom of the parent view
.Right() // position to the right of the parent view
.Width(50f).Height(50f)
.Attach(box5)
.Center() // position to the vertical center of the parent view
.Middle() // position to the horizontal center of the parent view
.Width(50f).Height(50f)
.Attach(box6)
.AboveOf(box5) // position above another view
.Center()
.Width(50f).Height(50f)
.Attach(box7)
.BelowOf(box5) // position below another view
.Center()
.Width(50f).Height(50f)
.Attach(box8)
.RightOf(box5) // position on the right of another view
.Middle()
.Width(50f).Height(50f)
.Attach(box9)
.LeftOf(box5) // position on the left of another view
.Middle()
.Width(50f).Height(50f)
.Attach(box10)
.AboveOf(box6)
.RightOf(box8)
.Width(50f).Height(50f)
.Attach(box11)
.AboveOf(box6)
.LeftOf(box9)
.Width(50f).Height(50f)
.Attach(box12)
.BelowOf(box7)
.RightOf(box8)
.Width(50f).Height(50f)
.Attach(box13)
.BelowOf(box7)
.LeftOf(box9)
.Width(50f).Height(50f);
}
public override void ViewDidLoad()
{
base.ViewDidLoad();
Title = "Margin";
var box1 = new UIView()
{
BackgroundColor = UIColor.FromRGB(200, 200, 200)
};
var box2 = new UIView()
{
BackgroundColor = UIColor.FromRGB(210, 210, 210)
};
var box3 = new UIView()
{
BackgroundColor = UIColor.FromRGB(220, 220, 220)
};
var box4 = new UIView()
{
BackgroundColor = UIColor.FromRGB(230, 230, 230)
};
var box5 = new UIView()
{
BackgroundColor = UIColor.FromRGB(230, 230, 230)
};
var box6 = new UIView()
{
BackgroundColor = UIColor.FromRGB(240, 240, 240)
};
var box7 = new UIView()
{
BackgroundColor = UIColor.FromRGB(240, 240, 240)
};
var box8 = new UIView()
{
BackgroundColor = UIColor.FromRGB(240, 240, 240)
};
var helper = new UIView();
// Margins are handeld similarly as they are in CSS. Methods for them also follow the same rules.
// Margins will not collapse and will have affect when you position a an element around another
ConstraintHelper
.Attach(box1)
.Left(10f) // add left margin
.Right(10f) // add right margin
.Top(10f) // add top margin
.Height(40f)
.StackTop()
.Attach(box2)
.SetMargin(10f) // setting all margin at once
.Left() // the element still has to be positioned
.Right()
.Top()
.Height(40f)
.StackTop()
.Attach(box3)
// margin don't collaps, the bottom margin of the previous element takes effect, so no margin top
.SetMargin(0, 10f) // there is multiple signatures (N, E, S, W), (N&S, E&W), (All the same)
.Left() // the element still has to be positioned
.Right()
.Top()
.Height(40f)
.StackTop()
// you can modify width and height you inherit of another view
.Attach(box4)
.SetMargin(10f, 5f, 0, 10f)
.Top()
.Left()
.WidthOfParent(0.5f, -15f) // left and right margin as modifier
.Height(45f)
.Attach(box5)
.SetMargin(10f, 10f, 0, 5f)
.Top()
.Right()
.WidthOfParent(0.5f, -15f) // left and right margin as modifier
.Height(45f)
.StackTop()
// don't be afraid to use helper views
.Attach(helper)
.WidthOfParent(1f, -10f)
.Top(10f)
.Left();
(new ConstraintHelper(helper))
.Attach(box6)
.SetMargin(0, 0, 0, 10f)
.Top()
.Left().StackLeft()
.WidthOfParent(0.3333f, -10f)
.Height(45f)
.Attach(box7)
.SetMargin(0, 0, 0, 10f)
.Top()
.Left().StackLeft()
.WidthOfParent(0.3333f, -10f)
.Height(45f)
.Attach(box8)
.SetMargin(0, 0, 0, 10f)
.Top()
.Left().StackLeft()
.WidthOfParent(0.3333f, -10f)
.Height(45f)
// make it a habit of pinning the last element to the bottom
// if the parents height is not predefined (specialy if you use scroll views!)
.Bottom();
}