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// | |
// MyViewController.swift | |
// TypedTableViewControllers | |
// | |
// Created Chris Eidhof on 23/03/15. | |
// Edited by Stan Serebryakov on 25/03/15. | |
// | |
func undefined() { fatalError("undefined") } | |
func when(@autoclosure condition: Void -> Bool, @autoclosure trueBranch: Void -> Void) { | |
if condition() { trueBranch() } | |
} | |
class Box<A> { | |
let unbox: A | |
init(_ val: A) { unbox = val } | |
} | |
import UIKit | |
class MyViewController: UIViewController { | |
@IBOutlet weak var tableView: UITableView! | |
override init() { | |
super.init(nibName: "MyViewController", bundle: nil) | |
} | |
required init(coder aDecoder: NSCoder) { | |
super.init(coder: aDecoder) | |
} | |
var items: [Any] = [] { | |
didSet { when(tableView != nil, tableView.reloadData()) } | |
} | |
var item: (Int -> Any?) = { _ in undefined() } | |
var configureCell: (UITableViewCell, Any) -> () = { _ in undefined() } | |
let cellId = "CellId" | |
override func viewDidLoad() { | |
super.viewDidLoad() | |
tableView.registerClass(UITableViewCell.self, forCellReuseIdentifier: cellId) | |
} | |
} | |
extension MyViewController: UITableViewDataSource, UITableViewDelegate { | |
func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) { | |
NSLog("\(item(indexPath.row))") | |
} | |
// MARK: - Table view data source | |
func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int { | |
return items.count | |
} | |
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { | |
let cell: UITableViewCell = tableView.dequeueReusableCellWithIdentifier(cellId) as! UITableViewCell | |
configureCell(cell, items[indexPath.row]) | |
return cell | |
} | |
class func newMyViewController<A>(items: [A], configure: (UITableViewCell, A) -> Void) -> MyViewController { | |
var vc = MyViewController() | |
vc.items = items.map { Box($0) } | |
vc.configureCell = { cell, obj in | |
if let value = obj as? Box<A> { | |
configure(cell, value.unbox) | |
} | |
} | |
vc.item = { i in | |
if let item = vc.items[i] as? Box<A> { | |
return item.unbox | |
} else { | |
return nil | |
} | |
} | |
return vc | |
} | |
} |
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What's the reason for defining
when
here?