multiple buttons and one delegate function, using tags and protocol, in Swift

custom Tab Bar using tags

in UIViewController:
import UIKit

class tempViewController: UIView {
    
    var array : NSArray

    func buttonPressed(navigationBar: ScrollBar, sender: UIButton) {
        switch sender.tag {
        case 0:
            array = arrayA
        case 1:
            array = arrayB
        }
        
        if(arrayA.count > 0) {
            tableView.scrollToRowAtIndexPath((NSIndexPath(forRow: 0, inSection: sectionA)), atScrollPosition: .Top, animated: true)
        }
    }

}

customUIView

import UIKit

protocol ScrollBarDelegate {
    func buttonPressed(scrollBar: ScrollBar, sender: UIButton)
}

class tempScrollBar: UIView {
    weak var delegate: ScrollBarDelegate?    
    @IBAction func buttonPressed(sender: UIButton) {
        delegate?.buttonPressed?(self, sender: sender)
    }
    
}