问Swift:获取特定类型的所有子视图并添加到数组中

EN

    extension UIView {

    /** This is the function to get subViews of a view of a particular type 
*/
    func subViews<T : UIView>(type : T.Type) -> [T]{
        var all = [T]()
        for view in self.subviews {
            if let aView = view as? T{
                all.append(aView)
            }
        }
        return all
    }


/** This is a function to get subViews of a particular type from view recursively. It would look recursively in all subviews and return back the subviews of the type T */
        func allSubViewsOf<T : UIView>(type : T.Type) -> [T]{
            var all = [T]()
            func getSubview(view: UIView) {
                if let aView = view as? T{
                all.append(aView)
                }
                guard view.subviews.count>0 else { return }
                view.subviews.forEach{ getSubview(view: $0) }
            }
            getSubview(view: self)
            return all
        }
    }

let allSubviews = view.allSubViewsOf(type: UIView.self)
let allLabels = view.allSubViewsOf(type: UILabel.self)

private func getSubviewsOf<T : UIView>(view:UIView) -> [T] {
    var subviews = [T]()

    for subview in view.subviews {
        subviews += getSubviewsOf(view: subview) as [T]

        if let subview = subview as? T {
            subviews.append(subview)
        }
    }

    return subviews
}

let allLabels : [UILabel] = getSubviewsOf(view: theView)

view.subviews.flatMap{ $0 as? YourView }

countDots = allDots!.view.subviews.flatMap{$0 as? Dot}.count