51 lines
2.0 KiB
Swift
51 lines
2.0 KiB
Swift
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extension UIView {
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enum HorizontalEdge { case left, leading, right, trailing }
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enum VerticalEdge { case top, bottom }
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enum Direction { case horizontal, vertical }
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enum Dimension { case width, height }
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private func anchor(from edge: HorizontalEdge) -> NSLayoutXAxisAnchor {
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switch edge {
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case .left: return leftAnchor
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case .leading: return leadingAnchor
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case .right: return rightAnchor
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case .trailing: return trailingAnchor
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}
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}
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private func anchor(from edge: VerticalEdge) -> NSLayoutYAxisAnchor {
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switch edge {
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case .top: return topAnchor
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case .bottom: return bottomAnchor
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}
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}
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func pin(_ constraineeEdge: HorizontalEdge, to constrainerEdge: HorizontalEdge, of view: UIView, withInset inset: CGFloat) {
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translatesAutoresizingMaskIntoConstraints = false
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anchor(from: constraineeEdge).constraint(equalTo: view.anchor(from: constrainerEdge), constant: inset).isActive = true
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}
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func pin(_ constraineeEdge: VerticalEdge, to constrainerEdge: VerticalEdge, of view: UIView, withInset inset: CGFloat) {
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translatesAutoresizingMaskIntoConstraints = false
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anchor(from: constraineeEdge).constraint(equalTo: view.anchor(from: constrainerEdge), constant: inset).isActive = true
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}
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func center(_ direction: Direction, in view: UIView) {
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translatesAutoresizingMaskIntoConstraints = false
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switch direction {
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case .horizontal: centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
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case .vertical: centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
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}
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}
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func set(_ dimension: Dimension, to size: CGFloat) {
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translatesAutoresizingMaskIntoConstraints = false
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switch dimension {
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case .width: widthAnchor.constraint(equalToConstant: size).isActive = true
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case .height: heightAnchor.constraint(equalToConstant: size).isActive = true
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}
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}
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}
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