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<!DOCTYPE html>
<html>
<head>
<title>Layout - High Fidelity Auto Layout for UIKit</title>
<style>
body { font-family: Sans-Serif; }
h3 { margin-bottom: 6px; padding-bottom: 6px; border-bottom: 1px solid #ccc; }
td { vertical-align: top; }
p { margin: 10px 0px 0px 0px; font-style: italic; }
pre { margin: 6px 0px 0px 0px; }
</style>
</head>
<body>
<div align="center">
<h1 align="center">Layout – High Fidelity Auto Layout for UIKit</h1>
<h2 align="center"><a href="https://github.com/Tinder/Layout">https://github.com/Tinder/Layout</a></h2>
<table>
<tr>
<td> </td>
<td>
<h2>Layout Examples</h2>
<h3>Single Subview</h3>
<pre>view.layout(subview.toEdges()).activate()</pre>
<h3>Multiple Subviews</h3>
<pre>view.layout {
label
.toSafeArea([.top])
.center(.horizontal)
imageView
.toSideEdges(inset: 20)
.height(200)
button
.center(.horizontal)
}
.vertical([label, imageView, button],
spacing: 50)
.activate()</pre>
<h2>Layout Methods</h2>
<h3>Constrain</h3>
<pre>constrain(viewA, to: .top, of: viewB)</pre>
<pre>constrain(viewA,
.top,
to: .top,
of: viewB)</pre>
<pre>constrain(viewA,
.top,
is: .greaterThanOrEqual,
to: .top,
of: viewB,
multiplier: 2,
constant: 100)</pre>
<pre>constrain(viewA.top, to: viewB.top)</pre>
<pre>constrain(viewA.top,
is: .greaterThanOrEqual,
to: viewB.top,
constant: 100,
priority: .high)</pre>
<pre>constrain(viewA.width, to: viewB.width)</pre>
<pre>constrain(viewA.width,
is: .greaterThanOrEqual,
to: viewB.width,
multiplier: 2,
constant: 100,
priority: .high)</pre>
<pre>constrain(viewA.width, to: 100)</pre>
<pre>constrain(viewA.width,
is: .greaterThanOrEqual,
to: 100,
priority: .high)</pre>
<pre>constrain(viewA, to: viewB, inset: 100)</pre>
<pre>constrain(viewA,
to: viewB,
insets: directional)</pre>
<pre>constrain(viewA,
to: viewB,
insets: canonical)</pre>
<h3>Equal</h3>
<pre>equal(.top, views)</pre>
<pre>equal([.top, .bottom], views)</pre>
<pre>equalSize(views)</pre>
<h3>Center</h3>
<pre>center(viewA,
between: viewB.leading,
and: viewB.trailing)</pre>
<pre>center(viewA,
between: viewB.leading,
and: viewB.trailing,
priority: .high)</pre>
<pre>center(viewA,
between: viewB.top,
and: viewB.bottom)</pre>
<pre>center(viewA,
between: viewB.top,
and: viewB.bottom,
priority: .high)</pre>
<h3>Stack</h3>
<pre>horizontal(views)</pre>
<pre>horizontal(views,
spacing: 100,
direction: .leftToRight,
priority: .high,
alignment: .centerY)</pre>
<pre>vertical(views)</pre>
<pre>vertical(views,
spacing: 100,
priority: .high,
alignment: .centerX)</pre>
<h3>Visual Format Language</h3>
<p>Only views with an <strong><code>accessibilityIdentifier</code></strong><br /> are made available to the Visual Format APIs.</p>
<p>The orientation format should be omitted<br />since it is automatically prepended.<p>
<p>The <strong><code>metrics</code></strong> of the layout are used by default.</p>
<pre>horizontal("[view]")</pre>
<pre>horizontal("[view]",
metrics: [:],
options: formatOptions)</pre>
<pre>vertical("[view]")</pre>
<pre>vertical("[view]",
metrics: [:],
options: formatOptions)</pre>
<h3>Activation</h3>
<pre>activate()</pre>
<pre>deactivate()</pre>
<h3>Priority</h3>
<pre>require()</pre>
<pre>withPriority(.high)</pre>
<pre>prioritize(.high)</pre>
<h3>Animation</h3>
<p>This method is useful when animating constraints.</p>
<pre>update()</pre>
</td>
<td> </td>
<td>
<h2>Layout Item Methods</h2>
<h3>Size</h3>
<pre>size(size)</pre>
<pre>size(size, priority: .high)</pre>
<pre>size(width: 200, height: 100)</pre>
<pre>size(width: 200,
height: 100,
priority: .high)</pre>
<h3>Width</h3>
<pre>width(100)</pre>
<pre>width(100, priority: .high)</pre>
<pre>width(is: .lessThanOrEqual, to: 100)</pre>
<pre>width(is: .lessThanOrEqual,
to: 100,
priority: .high)</pre>
<h3>Height</h3>
<pre>height(100)</pre>
<pre>height(100, priority: .high)</pre>
<pre>height(is: .lessThanOrEqual, to: 100)</pre>
<pre>height(is: .lessThanOrEqual,
to: 100,
priority: .high)</pre>
<h3>Square</h3>
<pre>// Size //</pre>
<pre>square(100)</pre>
<pre>square(100, priority: .high)</pre>
<pre>// Aspect Ratio //</pre>
<pre>square()</pre>
<h3>Aspect Ratio</h3>
<pre>aspectRatio(0.5)</pre>
<pre>aspectRatio(0.5, priority: .high)</pre>
<h3>Center</h3>
<pre>center()</pre>
<pre>center(offset: offset, priority: .high)</pre>
<pre>center(.horizontal)</pre>
<pre>center(.horizontal,
offset: 100,
multiplier: 2,
priority: .high)</pre>
<pre>center(.vertical)</pre>
<pre>center(.vertical,
offset: 100,
multiplier: 2,
priority: .high)</pre>
<pre>center(between: view.leading,
and: view.trailing)</pre>
<pre>center(between: view.top,
and: view.bottom)</pre>
<h3>Attributes</h3>
<p>Constrains to superview attributes.<p>
<pre>to(.top)</pre>
<pre>to(.top,
is: .lessThanOrEqual,
multiplier: 2,
constant: 100,
priority: .high)</pre>
<pre>to([.top, .bottom])</pre>
<pre>to([.top, .bottom],
constant: 100,
priority: .high)</pre>
<h3>Edges</h3>
<p>Constrains to superview edges.<p>
<pre>toEdges()</pre>
<pre>toEdges(inset: 100, priority: .high)</pre>
<pre>toEdges(insets: directional)</pre>
<pre>toEdges(insets: directional,
priority: .high)</pre>
<pre>toEdges(insets: canonical)</pre>
<pre>toEdges(insets: canonical,
priority: .high)</pre>
<pre>toEdges([.leading, .trailing])</pre>
<pre>toEdges([.leading, .trailing],
inset: 100,
priority: .high)</pre>
<pre>toEdges(canonical: [.left, .right])</pre>
<pre>toEdges(canonical: [.left, .right],
inset: 100,
priority: .high)</pre>
<pre>toSideEdges()</pre>
<pre>toSideEdges(inset: 100,
priority: .high)</pre>
<h3>Margins</h3>
<p>Constrains to superview margins.<p>
<pre>toMargins()</pre>
<pre>toMargins(inset: 100, priority: .high)</pre>
<pre>toMargins(insets: directional)</pre>
<pre>toMargins(insets: directional,
priority: .high)</pre>
<pre>toMargins(insets: canonical)</pre>
<pre>toMargins(insets: canonical,
priority: .high)</pre>
<pre>toMargins([.leading, .trailing])</pre>
<pre>toMargins([.leading, .trailing],
inset: 100,
priority: .high)</pre>
<pre>toMargins(canonical: [.left, .right])</pre>
<pre>toMargins(canonical: [.left, .right],
inset: 100,
priority: .high)</pre>
<pre>toSideMargins()</pre>
<pre>toSideMargins(inset: 100,
priority: .high)</pre>
<h3>Safe Area</h3>
<p>Constrains to superview safe area.<p>
<pre>toSafeArea()</pre>
<pre>toSafeArea(inset: 100, priority: .high)</pre>
<pre>toSafeArea(insets: directional)</pre>
<pre>toSafeArea(insets: directional,
priority: .high)</pre>
<pre>toSafeArea(insets: canonical)</pre>
<pre>toSafeArea(insets: canonical,
priority: .high)</pre>
<pre>toSafeArea([.leading, .trailing])</pre>
<pre>toSafeArea([.leading, .trailing],
inset: 100,
priority: .high)</pre>
<pre>toSafeArea(canonical: [.left, .right])</pre>
<pre>toSafeArea(canonical: [.left, .right],
inset: 100,
priority: .high)</pre>
<h3>Accessibility Identifier</h3>
<pre>_ = identifier</pre>
<pre>identifier = "identifier"</pre>
<pre>id("identifier")</pre>
</td>
<td> </td>
<td>
<h2>View Methods</h2>
<h3>Builder</h3>
<pre>// Auto Layout //</pre>
<pre>usingConstraints()</pre>
<pre>// Size //</pre>
<pre>constrainingSize()</pre>
<pre>constrainingSize(size)</pre>
<pre>// Width //</pre>
<pre>constrainingWidth()</pre>
<pre>constrainingWidth(100)</pre>
<pre>// Height //</pre>
<pre>constrainingHeight()</pre>
<pre>constrainingHeight(100)</pre>
<h3>Size</h3>
<pre>sizeConstraints()</pre>
<pre>sizeConstraints(size)</pre>
<pre>sizeConstraints(width: width,
height: height)</pre>
<h3>Width</h3>
<pre>widthConstraint(is: relation)</pre>
<pre>widthConstraint(is: relation,
to: 100)</pre>
<pre>widthConstraint()</pre>
<pre>widthConstraint(100)</pre>
<h3>Height</h3>
<pre>heightConstraint(is: relation)</pre>
<pre>heightConstraint(is: relation,
to: 100)</pre>
<pre>heightConstraint()</pre>
<pre>heightConstraint(100)</pre>
<h3>Square</h3>
<pre>// Size //</pre>
<pre>squareConstraints(100)</pre>
<pre>// Aspect Ratio //</pre>
<pre>squareConstraint()</pre>
<h3>Aspect Ratio</h3>
<pre>aspectRatioConstraint(0.5)</pre>
<h3>Equal</h3>
<pre>equalConstraints(for: .top,
to: [view])</pre>
<h3>Center</h3>
<pre>centerConstraints()</pre>
<pre>centerConstraints(offset: offset)</pre>
<h3>Attributes</h3>
<pre>constraint(toSuperview: .top)</pre>
<pre>constraint(for: .top,
toSuperview: .top)</pre>
<pre>constraint(for: .top,
is: .greaterThanOrEqual,
toSuperview: .top,
multiplier: 2,
constant: 100)</pre>
<pre>constraint(to: .top, of: view)</pre>
<pre>constraint(for: .top,
to: .top,
of: view)</pre>
<pre>constraint(for: .top,
is: .greaterThanOrEqual,
to: .top,
of: view,
multiplier: 2,
constant: 100)</pre>
<pre>constraints(toSuperview: [.top])</pre>
<pre>constraints(is: .greaterThanOrEqual,
toSuperview: [.top],
multiplier: 2,
constant: 100)</pre>
<pre>constraints(to: [.top], of: view)</pre>
<pre>constraints(is: .greaterThanOrEqual,
to: [.top],
of: view,
multiplier: 2,
constant: 100)</pre>
<h3>Edges</h3>
<p>Constrains to superview edges.<p>
<pre>edgeConstraints()</pre>
<pre>edgeConstraints(inset: 100)</pre>
<pre>edgeConstraints(insets: directional)</pre>
<pre>edgeConstraints(insets: canonical)</pre>
<pre>sideEdgeConstraints()</pre>
<pre>sideEdgeConstraints(inset: 100)</pre>
<h3>Margins</h3>
<p>Constrains to superview margins.<p>
<pre>marginConstraints()</pre>
<pre>marginConstraints(inset: 100)</pre>
<pre>marginConstraints(insets: directional)</pre>
<pre>marginConstraints(insets: canonical)</pre>
<pre>sideMarginConstraints()</pre>
<pre>sideMarginConstraints(inset: 100)</pre>
<h3>Safe Area</h3>
<p>Constrains to superview safe area.<p>
<pre>safeAreaConstraints()</pre>
<pre>safeAreaConstraints(inset: 100)</pre>
<pre>safeAreaConstraints(insets: directional)</pre>
<pre>safeAreaConstraints(insets: canonical)</pre>
<h2>Auto Layout</h2>
<h3>NSLayoutConstraint</h3>
<pre>activate()</pre>
<pre>deactivate()</pre>
<pre>require()</pre>
<pre>withPriority(.high)</pre>
<pre>prioritize(.high)</pre>
<h3>NSLayoutDimension</h3>
<pre>constraint(to: view.width)</pre>
<pre>constraint(is: .greaterThanOrEqual,
to: view.width,
multiplier: 2,
constant: 100)</pre>
<pre>constraint(is: .greaterThanOrEqual,
to: 100)</pre>
<pre>constraint(100)</pre>
<h3>NSLayoutXAxisAnchor</h3>
<pre>constraint(to: view.leading)</pre>
<pre>constraint(is: .greaterThanOrEqual,
to: view.leading,
constant: 100)</pre>
<h3>NSLayoutYAxisAnchor</h3>
<pre>constraint(to: view.top)</pre>
<pre>constraint(is: .greaterThanOrEqual,
to: view.top,
constant: 100)</pre>
<h3>Visual Format Language</h3>
<p>These methods are static on <strong><code>NSLayoutConstraint</code></strong>.<p>
<pre>constraints(format: "[view]",
views: ["view": view])</pre>
<pre>constraints(format: "[view]",
views: ["view": view],
metrics: [:],
options: formatOptions)</pre>
<pre>constraints(formats: ["[view]"],
views: ["view": view])</pre>
<pre>constraints(formats: ["[view]"],
views: ["view": view],
metrics: [:],
options: formatOptions)</pre>
</td>
<td> </td>
<td>
<h2>Arguments</h2>
<h3>Anchors</h3>
<pre>leading</pre>
<pre>trailing</pre>
<pre>left</pre>
<pre>right</pre>
<pre>top</pre>
<pre>bottom</pre>
<pre>centerX</pre>
<pre>centerY</pre>
<pre>width</pre>
<pre>height</pre>
<pre>firstBaseline</pre>
<pre>lastBaseline</pre>
<h3>Insets</h3>
<pre>directional(top: 100,
leading: 100,
bottom: 100,
trailing: 100)</pre>
<pre>canonical(top: 100,
left: 100,
bottom: 100,
right: 100)</pre>
<h3>Directional Edges</h3>
<pre>top</pre>
<pre>bottom</pre>
<pre>leading</pre>
<pre>trailing</pre>
<h3>Canonical Edges</h3>
<pre>top</pre>
<pre>bottom</pre>
<pre>left</pre>
<pre>right</pre>
<h3>Layout Direction</h3>
<pre>leadingToTrailing</pre>
<pre>leftToRight</pre>
<h3>X-Axis Attributes</h3>
<pre>leading</pre>
<pre>trailing</pre>
<pre>left</pre>
<pre>right</pre>
<pre>centerX</pre>
<h3>Y-Axis Attributes</h3>
<pre>top</pre>
<pre>bottom</pre>
<pre>centerY</pre>
<pre>firstBaseline</pre>
<pre>lastBaseline</pre>
<h3>Layout Priority</h3>
<pre>disabled</pre>
<pre>low</pre>
<pre>high</pre>
<h2>View Controller</h2>
<h3>Safe Area</h3>
<pre>safeTop</pre>
<pre>safeBottom</pre>
<h2>Collections</h2>
<h3>[Layout]</h3>
<pre>activate()</pre>
<pre>deactivate()</pre>
<h3>[NSLayoutConstraint]</h3>
<pre>activate()</pre>
<pre>deactivate()</pre>
<pre>require()</pre>
<pre>withPriority(.high)</pre>
<pre>prioritize(.high)</pre>
<h2>Frames</h2>
<h3>View</h3>
<pre>usingFrames()</pre>
<pre>usingFrames(.scaleWithSuperview)</pre>
<pre>disablingIntrinsicSize()</pre>
<h3>Autoresizing Mask</h3>
<pre>topLeft</pre>
<pre>topRight</pre>
<pre>bottomLeft</pre>
<pre>bottomRight</pre>
<pre>scaleWithSuperview</pre>
</td>
<td> </td>
</tr>
</table>
<h4 align="center">Copyright © 2024 Tinder (Match Group, LLC)</h4>
</div>
</body>
</html>