mrustaa
100 lines
2.8 KiB
Swift
100 lines
2.8 KiB
Swift
//
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// XibView.swift
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// PatternsSwift
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//
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// Created by mrustaa on 19/04/2020.
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// Copyright © 2020 mrustaa. All rights reserved.
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//
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import UIKit
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class XibView: UIView {
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// MARK: - Properties
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public weak var contentView: UIView?
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// MARK: - Initialize
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required public init?(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)
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contentView = fromNib()
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loadedFromNib()
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}
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public init() {
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super.init(frame: CGRect.zero)
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contentView = fromNib()
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frame = contentView?.frame ?? frame
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loadedFromNib()
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}
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// MARK: - Postflight
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open func loadedFromNib() {
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}
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// MARK: - Load Nib
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func fromNibWithoutConstraints() -> UIView? {
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guard let contentView = Bundle(for: type(of: self)).loadNibNamed(String(describing: type(of: self)), owner: self, options: nil)?.first as? UIView else {
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return nil
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}
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contentView.translatesAutoresizingMaskIntoConstraints = false
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addSubview(contentView)
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return contentView
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}
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func fromNib() -> UIView? {
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guard let contentView = fromNibWithoutConstraints() else { return nil }
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let bottomConstraint = NSLayoutConstraint(
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item: contentView,
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attribute: NSLayoutConstraint.Attribute.bottom,
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relatedBy: NSLayoutConstraint.Relation.equal,
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toItem: self,
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attribute: NSLayoutConstraint.Attribute.bottom,
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multiplier: 1,
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constant: 0
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)
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let trailingConstraint = NSLayoutConstraint(
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item: contentView,
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attribute: NSLayoutConstraint.Attribute.trailing,
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relatedBy: NSLayoutConstraint.Relation.equal,
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toItem: self,
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attribute: NSLayoutConstraint.Attribute.trailing,
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multiplier: 1,
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constant: 0
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)
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let topConstraint = NSLayoutConstraint(
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item: contentView,
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attribute: NSLayoutConstraint.Attribute.top,
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relatedBy: NSLayoutConstraint.Relation.equal,
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toItem: self,
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attribute: NSLayoutConstraint.Attribute.top,
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multiplier: 1,
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constant: 0
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)
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let leadingConstraint = NSLayoutConstraint(
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item: contentView,
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attribute: NSLayoutConstraint.Attribute.leading,
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relatedBy: NSLayoutConstraint.Relation.equal,
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toItem: self,
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attribute: NSLayoutConstraint.Attribute.leading,
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multiplier: 1,
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constant: 0
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)
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addConstraints([bottomConstraint, trailingConstraint, topConstraint, leadingConstraint])
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return contentView
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}
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}
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