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47 lines
1.3 KiB
47 lines
1.3 KiB
/*********************************************
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*
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* This code is under the MIT License (MIT)
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*
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* Copyright (c) 2016 AliSoftware
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*
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*********************************************/
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import UIKit
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// MARK: Protocol Definition
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/// Make your UIView subclasses conform to this protocol when:
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/// * they *are* NIB-based, and
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/// * this class is used as the XIB's root view
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///
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/// to be able to instantiate them from the NIB in a type-safe manner
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public protocol NibLoadable: class {
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/// The nib file to use to load a new instance of the View designed in a XIB
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static var nib: UINib { get }
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}
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// MARK: Default implementation
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public extension NibLoadable {
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/// By default, use the nib which have the same name as the name of the class,
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/// and located in the bundle of that class
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static var nib: UINib {
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return UINib(nibName: String(describing: self), bundle: Bundle(for: self))
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}
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}
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// MARK: Support for instantiation from NIB
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public extension NibLoadable where Self: UIView {
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/**
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Returns a `UIView` object instantiated from nib
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- returns: A `NibLoadable`, `UIView` instance
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*/
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static func loadFromNib() -> Self {
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guard let view = nib.instantiate(withOwner: nil, options: nil).first as? Self else {
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fatalError("The nib \(nib) expected its root view to be of type \(self)")
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}
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return view
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}
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}
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