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Adding support for instantiate viewcontroller using identifier #35

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Adding support for instantiate viewcontroller using identifier #35

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21 changes: 17 additions & 4 deletions ExampleMVVM/Presentation/Utils/Protocols/StoryboardInstantiable.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -3,21 +3,34 @@ import UIKit
protocol StoryboardInstantiable: NSObjectProtocol {
associatedtype T
static var defaultFileName: String { get }
static func instantiateViewController(_ bundle: Bundle?) -> T
static var defaultIdentifier: String { get }
static func instantiateViewController(_ bundle: Bundle?, _ identifier: String?) -> T
}

extension StoryboardInstantiable where Self: UIViewController {
static var defaultFileName: String {
return NSStringFromClass(Self.self).components(separatedBy: ".").last!
}

static func instantiateViewController(_ bundle: Bundle? = nil) -> Self {
static var defaultIdentifier: String {
return NSStringFromClass(Self.self).components(separatedBy: ".").last! + "Identifier"
}

static func instantiateViewController(_ bundle: Bundle? = nil, _ identifier: String? = nil) -> Self {
let fileName = defaultFileName
let storyboard = UIStoryboard(name: fileName, bundle: bundle)
guard let vc = storyboard.instantiateInitialViewController() as? Self else {

if let storyboardIdentifier = identifier {
guard let viewController = storyboard.instantiateViewController(withIdentifier: storyboardIdentifier) as? Self else {
fatalError("Cannot instantiate view controller \(Self.self) from storyboard with name \(fileName) using identifier \(storyboardIdentifier)")
}
return viewController
}

guard let initialViewController = storyboard.instantiateInitialViewController() as? Self else {

fatalError("Cannot instantiate initial view controller \(Self.self) from storyboard with name \(fileName)")
}
return vc
return initialViewController
}
}