Created
July 13, 2018 08:45
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import Foundation | |
import UIKit | |
// MARK: Protocol Definition | |
/// Make your UIView subclasses conform to this protocol when: | |
/// * they *are* NIB-based, and | |
/// * this class is used as the XIB's root view | |
/// | |
/// to be able to instantiate them from the NIB in a type-safe manner | |
public protocol NibLoadable: class { | |
/// The nib file to use to load a new instance of the View designed in a XIB | |
static var nib: UINib { get } | |
} | |
// MARK: Default implementation | |
public extension NibLoadable { | |
/// By default, use the nib which have the same name as the name of the class, | |
/// and located in the bundle of that class | |
static var nib: UINib { | |
return UINib(nibName: String(describing: self), bundle: Bundle(for: self)) | |
} | |
} | |
// MARK: Support for instantiation from NIB | |
public extension NibLoadable where Self: UIView { | |
/** | |
Returns a `UIView` object instantiated from nib | |
- returns: A `NibLoadable`, `UIView` instance | |
*/ | |
static func loadFromNib() -> Self { | |
guard let view = nib.instantiate(withOwner: nil, options: nil).first as? Self else { | |
fatalError("The nib \(nib) expected its root view to be of type \(self)") | |
} | |
return view | |
} | |
} |
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