40 lines
2.1 KiB
Swift
40 lines
2.1 KiB
Swift
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import UIKit
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@objc public extension UIView {
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func addCenteredSubview(_ subview: UIView) {
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addSubview(subview)
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subview.translatesAutoresizingMaskIntoConstraints = false
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let centerXConstraint = centerXAnchor.constraint(equalTo: subview.centerXAnchor)
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let centerYConstraint = centerYAnchor.constraint(equalTo: subview.centerYAnchor)
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NSLayoutConstraint.activate([centerXConstraint, centerYConstraint])
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}
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@objc func wmf_addSubviewWithConstraintsToEdges(_ subview: UIView) {
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wmf_addSubview(subview, withConstraintsToEdgesWithInsets: .zero)
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}
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@objc func wmf_addSubview(_ subview: UIView, withConstraintsToEdgesWithInsets insets: UIEdgeInsets, priority: UILayoutPriority = .required, belowSubview: UIView? = nil) {
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if let belowSubview = belowSubview {
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insertSubview(subview, belowSubview: belowSubview)
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} else {
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addSubview(subview)
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}
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wmf_addConstraintsToEdgesOfView(subview, withInsets: insets, priority: priority)
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}
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// Until we drop iOS 10 and can use NSDirectionalEdgeInsets, assume insets.left == leading & insets.right == trailing
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@objc func wmf_addConstraintsToEdgesOfView(_ subview: UIView, withInsets insets: UIEdgeInsets = .zero, priority: UILayoutPriority = .required) {
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subview.translatesAutoresizingMaskIntoConstraints = false
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subview.frame = bounds.inset(by: insets)
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let topConstraint = subview.topAnchor.constraint(equalTo: topAnchor, constant: insets.top)
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topConstraint.priority = priority
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let bottomConstraint = bottomAnchor.constraint(equalTo: subview.bottomAnchor, constant: insets.bottom)
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bottomConstraint.priority = priority
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let leftConstraint = subview.leadingAnchor.constraint(equalTo: leadingAnchor, constant: insets.left)
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leftConstraint.priority = priority
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let rightConstraint = trailingAnchor.constraint(equalTo: subview.trailingAnchor, constant: insets.right)
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rightConstraint.priority = priority
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addConstraints([topConstraint, bottomConstraint, leftConstraint, rightConstraint])
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}
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}
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