Get ALL view inside ViewController - ios

Question

I am trying to get all views inside my UIViewController.
I am using this code:
for subview : UIView in self.view.subviews{
//code here
}
the problem is that I don't get views that are inside a UIView.
so I get all view except of their children.
please, how can I get ALL Views that are either child or parent inside my UIViewController? even if a view has a child that has a child that has a child. I want to go through all views.
thanx in advance :)
(please in swift 4.0)

Answer 1

You need to recursively process all subviews.
func processSubviews(of view: UIView) {
// 1. code here do something with view
for subview in view.subviews {
// 2. code here do something with subview
processSubviews(of: subview)
// 3. code here do something with subview
}
// 4. code here do something with view
}
You need to put your code at either position 1, 2, 3, or 4 (or possibly two or more of those places) depending on the results you want.
Then you can call this as:
processSubviews(of: self.view)

Answer 2

For get all views (as Label, Button, View, ...) in your view hierarchy and access to all child view in your viewController you should using from a recursive func to iterate all views :
func getAllSubviews(view:UIView) {
for subview in view.subviews {
if let takenLabel = subview as? UILabel {
takenLabel.backgroundColor = UIColor.red
}
getAllSubviews(view:subview)
}
}
You can using from this func to access other view like button and change them .
in this case i'm changing background color of all label in viewController to red

Answer 3

There are many different way to get subviews
To Get all the subviews in the parent view
for subview in view.subviews{
// you can get all of your views one by one here.
}
To Filter if any tagged view is available or not (lets assume view is tagged by 100)
view.subviews.filter{$0.tag == 100}
Extensions to check if Any view contains sub views
extension UIView{
func isAvailabletoParentView(inParentView : UIView, subViewTag : Int) -> Bool{
var isAvailable = false
for subviews in inParentView.subviews{
if subviews.tag == subViewTag{
isAvailable = true
return true
}else{
isAvailable = false
}
}
return isAvailable
}
}
Call Extension like
subview.isAvailabletoParentView(inParentView: parentView, subViewTag: anyTagToSubView)
Hope it will helps , Happy coding 🙂.