Swift ᔄࣳਞق ᖫᑕਫ᪢ @hankbao 1 

՗ Obj-C ک Swift ౯ժ឴஑ԧՋԍ! @hankbao 2 

ᑮ؀ — C: NULL — Objective-C: nil — Swift: Optional.None @hankbao 3 

Კ᧏ — ᖫᦲᲙ᧏ — ෙ᥺०ᨳ — ᬩᤈ෸Კ᧏ @hankbao 4 

ᖫᦲᲙ᧏ @hankbao 5 

ෙ᥺०ᨳ @hankbao 6 

ᬩᤈ෸Კ᧏ @hankbao 7 

Ոᙂ༄ၥ let img = UIImage(named: "project")! @hankbao 8 

ᖫᦲ࢏༄ၥ extension UIImage { enum Asset: String { case Favorite = "favorite" case Project = "project" ... } convenience init(asset: Asset) { ... } } let img = UIImage(asset: .Project) @hankbao 9 

ᔄࣳਞقጱᩒრᓕቘ — R.swift — SwiftGen — Shark — Laurine @hankbao 10 

ᔄࣳਞق — ᩒრᓕቘ — ᭗Ꭳݷᑍ — ࢶᇆݷᑍ — UI ਁᒧԀ — ... — AnyObject => T @hankbao 11 

DataSource struct User { let id: String let name: String } struct Channel { let id: String let title: String } @hankbao 12 

DataSource class DataSource: NSObject, UITableViewDataSource { typealias Configure = (cell: UITableViewCell, item: Item) -> UITableViewCell } tableView.dataSource = DataSource(configure: ...) @hankbao 13 

DataSource enum DataItem { case UserItem(user: User) case ChannelItem(channel: Channel) } @hankbao 14 

DataSource protocol ReuseIdentifierType { var reuseID: String { get } } extension DataItem: ReuseIdentifierType { var reuseID: String { switch self { case .UserItem: return "user_cell" case .ChannelItem: return "channel_cell" } } } @hankbao 15 

DataSource class DataSource: NSObject, UITableViewDataSource { func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { let item = items[indexPath.row] let cell = tableView.dequeueReusableCellWithIdentifier(item.reuseID, forIndexPath: indexPath) return configure(cell: cell, item: item) } ... } @hankbao 16 

݇ᘍᩒා — The Swift Programming Language — WWDC — objc.io — realm.io @hankbao 17 

Thanks @hankbao 18