Loading iOS view dynamically from xib file - ios

Question

Ive been searching for a while for a simple example on how to reuse views from xib files in my storyboard but all i find was outdated or dosen't solve my problem
the situation is that I has simple:
I have a viewController in my storyboard
I dragged to it two view from the library
I had created a myCustomView.xib and myCustomView.swift file (they are empty now)
I have I button on viewController (so the tree (two view and one button) are setting together on the viewController in the storyboard)
the question is: I want one view to be loaded dynamically on app launch and the other one to be loaded on button click
an other question: how can I connect myCustomView to that viewController
thank you

Answer 1

I've implemented an extension for UIView:
extension UIView {
static func createInstance<T: UIView>(ofType type: T.Type) -> T {
let className = NSStringFromClass(type).components(separatedBy: ".").last
return Bundle.main.loadNibNamed(className!, owner: self, options: nil)![0] as! T
}
}
In this way, wherever you can load your custom view in this way:
func override viewDidLoad() {
super.viewDidLoad()
let customView = UIView.createInstance(ofType: CustomView.self)
self.view.addSubview(customView)
}

Answer 2

Add bellow code in your custom view class
class MyCustomView: UIView {
#IBOutlet var contentView: UIView! // take view outlet
override init(frame: CGRect) {
super.init(frame: frame)
xibSetup()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
xibSetup()
}
func xibSetup() {
contentView = loadViewFromNib()
// use bounds not frame or it'll be offset
contentView!.frame = bounds
//Make the view stretch with containing view
contentView!.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
// Adding custom subview on top of our view (over any custom drawing > see note below)
addSubview(contentView!)
layoutIfNeeded()
}
override func layoutIfNeeded() {
super.layoutIfNeeded()
print("layoutIfNeeded")
}
func loadViewFromNib() -> UIView! {
let bundle = Bundle(for: type(of: self))
let nib = UINib(nibName: String(describing: type(of: self)), bundle: bundle)
let view = nib.instantiate(withOwner: self, options: nil)[0] as! UIView
return view
}
}
Add this class as superclass view in storyboard.