mirror of
https://github.com/MessageKit/MessageKit.git
synced 2026-02-06 19:03:19 +00:00
zhongwuzw
117 lines
4.4 KiB
Swift
117 lines
4.4 KiB
Swift
/*
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MIT License
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Copyright (c) 2017 MessageKit
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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*/
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import UIKit
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extension UIView {
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func fillSuperview() {
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guard let superview = self.superview else {
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return
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}
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translatesAutoresizingMaskIntoConstraints = false
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let constraints: [NSLayoutConstraint] = [
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leftAnchor.constraint(equalTo: superview.leftAnchor),
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rightAnchor.constraint(equalTo: superview.rightAnchor),
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topAnchor.constraint(equalTo: superview.topAnchor),
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bottomAnchor.constraint(equalTo: superview.bottomAnchor)
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]
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NSLayoutConstraint.activate(constraints)
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}
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func centerInSuperview() {
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guard let superview = self.superview else {
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return
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}
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translatesAutoresizingMaskIntoConstraints = false
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let constraints: [NSLayoutConstraint] = [
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centerXAnchor.constraint(equalTo: superview.centerXAnchor),
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centerYAnchor.constraint(equalTo: superview.centerYAnchor)
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]
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NSLayoutConstraint.activate(constraints)
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}
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func constraint(equalTo size: CGSize) {
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guard superview != nil else { return }
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translatesAutoresizingMaskIntoConstraints = false
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let constraints: [NSLayoutConstraint] = [
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widthAnchor.constraint(equalToConstant: size.width),
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heightAnchor.constraint(equalToConstant: size.height)
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]
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NSLayoutConstraint.activate(constraints)
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}
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@discardableResult
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func addConstraints(_ top: NSLayoutYAxisAnchor? = nil, left: NSLayoutXAxisAnchor? = nil, bottom: NSLayoutYAxisAnchor? = nil, right: NSLayoutXAxisAnchor? = nil, topConstant: CGFloat = 0, leftConstant: CGFloat = 0, bottomConstant: CGFloat = 0, rightConstant: CGFloat = 0, widthConstant: CGFloat = 0, heightConstant: CGFloat = 0) -> [NSLayoutConstraint] {
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if self.superview == nil {
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return []
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}
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translatesAutoresizingMaskIntoConstraints = false
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var constraints = [NSLayoutConstraint]()
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if let top = top {
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let constraint = topAnchor.constraint(equalTo: top, constant: topConstant)
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constraint.identifier = "top"
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constraints.append(constraint)
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}
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if let left = left {
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let constraint = leftAnchor.constraint(equalTo: left, constant: leftConstant)
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constraint.identifier = "left"
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constraints.append(constraint)
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}
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if let bottom = bottom {
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let constraint = bottomAnchor.constraint(equalTo: bottom, constant: -bottomConstant)
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constraint.identifier = "bottom"
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constraints.append(constraint)
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}
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if let right = right {
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let constraint = rightAnchor.constraint(equalTo: right, constant: -rightConstant)
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constraint.identifier = "right"
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constraints.append(constraint)
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}
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if widthConstant > 0 {
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let constraint = widthAnchor.constraint(equalToConstant: widthConstant)
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constraint.identifier = "width"
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constraints.append(constraint)
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}
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if heightConstant > 0 {
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let constraint = heightAnchor.constraint(equalToConstant: heightConstant)
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constraint.identifier = "height"
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constraints.append(constraint)
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}
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NSLayoutConstraint.activate(constraints)
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return constraints
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}
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}
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