// Defining dropdown button like a UIbutton and configure it
let dropDownButton: DropdownButton = {
    let button: DropdownButton = DropdownButton()
    button.layer.cornerRadius = 10
    button.backgroundColor = .green
    button.setTitleColor(.white, for: .normal)
    button.selectedRowColor = .lightGray
    button.selectedRowTextColor = .white
    button.rowHeight = 40
    return button
}()

// The the Closure returns Selected Index and String 
dropDownButton.didSelect { (selectedText , index ,id) in
        self.valueLabel.text = "Selected String: \(selectedText) \n index: \(index)"
}

// seting options 
let options = ["Option 1", "Option 2", "Option 3"]
let ids = [0, 1, 2]

dropDownButton.setOptions(options: options, optionIds: ids, selectedIndex: 0)

dropDownButton.expandList()  // To show the Drop Down Menu
dropDownButton.collapseList() // To hide the Drop Down Menu

listWillAppear() {
//You can Do anything when Dropdown menu willAppear 
}

listDidAppear() {
//You can Do anything when Dropdown menu listDidAppear
}

listWillDisappear() {
//You can Do anything when Dropdown menu listWillDisappear 
}

listDidDisappear() {
//You can Do anything when Dropdown menu listDidDisappear
}