Created
September 27, 2015 20:59
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Extension to UITableView that allows to avoid explict cell classes registrations
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| // | |
| // Copyright (c) 2014-2015 Actor LLC. <https://actor.im> | |
| // | |
| import Foundation | |
| // Cell automatic registration and dequeuing | |
| private var registeredCells = "cells!" | |
| extension UITableView { | |
| private func cellTypeForClass<T where T: UITableViewCell>(cellClass: T.Type) -> String { | |
| let cellReuseId = "\(T.self)" | |
| var registered: ([String])! = getAssociatedObject(tableView, associativeKey: ®isteredCells) | |
| var found = false | |
| if registered != nil { | |
| if registered.contains(cellReuseId) { | |
| found = true | |
| } else { | |
| registered.append(cellReuseId) | |
| setAssociatedObject(self, value: registered, associativeKey: ®isteredCells) | |
| } | |
| } else { | |
| setAssociatedObject(self, value: [cellReuseId], associativeKey: ®isteredCells) | |
| } | |
| if !found { | |
| self.registerClass(T.self, forCellReuseIdentifier: cellReuseId) | |
| } | |
| return cellReuseId | |
| } | |
| func dequeueCell<T where T: UITableViewCell>(indexPath: NSIndexPath? = nil) -> T { | |
| let reuseId = cellTypeForClass(T.self) | |
| if indexPath != nil { | |
| return self.dequeueReusableCellWithIdentifier(reuseId, forIndexPath: indexPath!) as! T | |
| } else { | |
| return self.dequeueReusableCellWithIdentifier(reuseId) as! T | |
| } | |
| } | |
| } |
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