Load View/ViewController from Nib file

[piv199]

Now it looks like the following

let filterHeaderView = UINib(nibName: FilterHeaderView.className, bundle: nil).instantiateWithOwner(self, options: nil).last as? FilterHeaderView

Not as Swifty as it could be. Should we have an extension for that?

Well I don't actually know yet how it could be more swifty. Could anybody give an example? Something like let filterHeaderView = UINib.instantiate(view: FilterHeaderView) - loads nib from nil bundle with class name name, searches for view with passed class and returns it. Or something more controllable.

[Esqarrouth]

What else needs to be controlled?

[piv199]

Just found that we already have something similar in EZSwiftExtensions.

let view: CustomView = NSBundle.loadNib("nibName") or let view =NSBundle.loadNib("nibName") as? CustomView

However it's a bit confusing as I suppose. Also it's not SwiftLint compliant.

We should control View/ViewController that will be instantiated by its type, nib should also have the same name, thus it's good practice to have the same name for View class and it's xib.

Hm... for ViewController it's not the best approach to always name xib the same as class name. So, perhaps, we should control nib name, class to look up and overloaded owner with owner.

[Esqarrouth]

Yeah, makes sense, personally I don't use storyboards/xibs so you 2 decide

[lfarah]

@piv199 how would you do it? I agree with you 100%

Wanna send your Swiftier version of this?

let view: CustomView = NSBundle.loadNib("nibName") or let view =NSBundle.loadNib("nibName") as? CustomView

[lfarah]

@piv199 any updates on this? Let me know if you need help! 😉

[vilapuigvila]

I have this extension for that:
public class func fromNib() -> T {
return T(nibName:String(describing: T.self), bundle: nil)
}
and then you use:
let vc:SplashViewController = .fromNib()

[lfarah]

@piv199 what do you think?

[vilapuigvila]

then I create a manager first:
enum ViewControllersManager {
/// Add more cases
case splashVC
case loginVC
case signupVC
}

then ..
extension ViewControllersManager: RawRepresentable {
typealias RawValue = UIViewController
var rawValue: RawValue {
switch self {
case .splashVC: let vc:SplashViewController = .fromNib()
return vc
case .loginVC: let vc:LoginViewController = .fromNib()
return vc
case .signupVC: let vc:SignupViewController = .fromNib()
}
}

use ViewControllersManager.loginVC.rawValue

[piv199]

let vc = LoginViewController.fromNib()

Hm.. makes sense... Also, have something like

let vc = LoginViewController.fromNib(named: "Login")
let vc = LoginViewController.fromNib(named: "LoginViewController", bundle: Bundle.self)

@lfarah As for me, I like this 👍

[vilapuigvila]

@piv199 @lfarah how about that?
class func fromNib<T:UIViewController>(type: T.Type) -> T {
return T(nibName:T.self.className, bundle: nil)
}

and then:
let vc = SplashViewController.fromNib(type: SplashViewController.self)

[piv199]

@vilapuigvila

let vc = SplashViewController.fromNib(type: SplashViewController.self)
why not let vc = SplashViewController.fromNib(), if we already have T in function ?

[vilapuigvila]

I don't be able to get Type of UIVIewContreller inside function, any ideas?
Thanks