PopoverActionViewController.swift

PopoverActionViewController.swift

//
//  PopoverActionViewController.swift
//  ORE2
//
//  Created by nya on 2/2/16.
//  Copyright © 2016 cathand.org. All rights reserved.
//

import UIKit

class PopoverAction {
    
    var title: String
    var handler: () -> Void
    
    init(title: String, handler: () -> Void) {
        self.title = title
        self.handler = handler
    }
}

class PopoverActionViewController: UITableViewController, UIPopoverPresentationControllerDelegate {

    class func show(viewController: UIViewController, from: UIView, actions: [PopoverAction]) {
        let vc = PopoverActionViewController()
        vc.actions = actions
        vc.modalPresentationStyle = .Popover
        if let presentationController = vc.popoverPresentationController {
            presentationController.permittedArrowDirections = [.Up, .Down]
            presentationController.sourceView = from
            presentationController.sourceRect = from.bounds
            presentationController.delegate = vc
        }
        viewController.presentViewController(vc, animated: true, completion: nil);
    }
    
    func adaptivePresentationStyleForPresentationController(controller: UIPresentationController) -> UIModalPresentationStyle {
        return .None
    }
    
    var actions = [PopoverAction]()

    override func viewDidLoad() {
        super.viewDidLoad()

        tableView.rowHeight = 44
        tableView.separatorInset = UIEdgeInsetsMake(0, 15, 0, 15)
        tableView.layoutMargins = UIEdgeInsetsZero
        tableView.backgroundColor = UIColor.clearColor()
    }

    override var preferredContentSize: CGSize {
        get {
            return CGSizeMake(300, CGFloat(actions.count) * tableView.rowHeight - 0.5)
        }
        set(val) {
            super.preferredContentSize = val
        }
    }

    // MARK: - Table view data source

    override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
        return 1
    }

    override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return actions.count
    }

    override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        var cell: UITableViewCell! = tableView.dequeueReusableCellWithIdentifier("cell")
        if cell == nil {
            cell = UITableViewCell(style: .Default, reuseIdentifier: "cell")
            cell.textLabel?.textAlignment = .Center
            cell.backgroundColor = UIColor.clearColor()
            cell.contentView.backgroundColor = UIColor.clearColor()
        }

        cell.textLabel?.text = actions[indexPath.row].title
        
        return cell
    }
    
    override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
        dismissViewControllerAnimated(true) {
            self.actions[indexPath.row].handler()
        }
    }
}

A curious question... from where and how are you calling this class?
I also gave it a star! :-) Thanks. --mike