CollectionViewFocus

This is a CollectionView Focus Update for tv-os .

Problem :

Now, In tv-os application developement you can not move focus at button(which is in collectionViewCell) and collectionViewCell vice versa .

Solution :

You can use this library for move focus at button and Cell viceVersa

Preview :

How to use it:

Put this code in your collectionViewCell file, i have two button in collectionViewCell and i am able to move focas in butoon and cell vice versa.

@IBOutlet weak var btnFirst: UIButton!
@IBOutlet weak var btnSecond: UIButton!

private var isbtnFirst  = false
private var isbtnSecond = false
private var isDefault   = false

override var preferredFocusEnvironments: [UIFocusEnvironment]{
    
    switch true {
    case isbtnFirst:
        return [btnFirst]
    case isbtnSecond:
        return [btnSecond]
    case isDefault:
        return [self]
    default:
        return [btnFirst]
    }
}
override func shouldUpdateFocus(in context: UIFocusUpdateContext) -> Bool {
   
    switch true {
        
    case isbtnFirst:
        isbtnFirst = false
        return true
    case isbtnSecond:
        isbtnSecond = false
        return true
    case isDefault:
        isDefault = false
        return true
    default:
        return true
    }
}
override func didUpdateFocus(in context: UIFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
    
    print("previouslyFocusedView : \n  \(context.previouslyFocusedView) \n \n")
    print("nextFocusedView :  \n\(context.nextFocusedView) \n")
    
    if (context.previouslyFocusedView != nil) && (context.nextFocusedView != nil){
        
        if context.nextFocusedView is FocusCollectionViewCell && context.previouslyFocusedView  !=  self.btnSecond {
            self.isbtnFirst = true
            self.setNeedsFocusUpdate()
        }
        if context.nextFocusedView  ==  self.btnFirst && context.previouslyFocusedView  ==  self.btnFirst{
            self.isbtnSecond = true
            self.setNeedsFocusUpdate()
        }
        if context.nextFocusedView  ==  self.btnSecond && context.previouslyFocusedView  ==  self.btnSecond{
            self.isDefault = true
            self.setNeedsFocusUpdate()
        }
    }
}