NSNotification.userInfoを Swiftyに扱おう

potatotips #27 (http://connpass.com/event/27156/) の発表資料です。https://github.com/takasek/Notifwift の紹介です。

Transcript

1. /4/PUJGJDBUJPOVTFS*OGPΛ

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3. ಥવͰ͕͢
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4. Α͋͘Δ࣮૷
   // Model
   class User { … }
   API.fetchUser(id: id) { (user: User) in
   NSNotificationCenter.defaultCenter()
   .postNotificationName(
   "DidUserReceivedNotification",
   object: nil,
   userInfo: ["user": user])
   }
   // View
   NSNotificationCenter.defaultCenter().addObserverForName(
   "DidUserReceivedNotification",
   object: nil,
   queue: NSOperationQueue.mainQueue(),
   usingBlock: { [weak self] (n: NSNotification) in
   guard let user = n.userInfo?["user"] as? User else {
   return
   }
   self?.reload(user)
   })
   

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5. Α͋͘Δ࣮૷
   // Model
   class User { … }
   API.fetchUser(id: id) { (user: User) in
   NSNotificationCenter.defaultCenter()
   .postNotificationName(
   "DidUserReceivedNotification",
   object: nil,
   userInfo: ["user": user])
   }
   // View
   NSNotificationCenter.defaultCenter().addObserverForName(
   "DidUserReceivedNotification",
   object: nil,
   queue: NSOperationQueue.mainQueue(),
   usingBlock: { [weak self] (n: NSNotification) in
   guard let user = n.userInfo?["user"] as? User else {
   return
   }
   self?.reload(user)
   })
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6. Α͋͘Δ࣮૷
   // Model
   class User { … }
   API.fetchUser(id: id) { (user: User) in
   NSNotificationCenter.defaultCenter()
   .postNotificationName(
   "DidUserReceivedNotification",
   object: nil,
   userInfo: ["user": user])
   }
   // View
   NSNotificationCenter.defaultCenter().addObserverForName(
   "DidUserReceivedNotification",
   object: nil,
   queue: NSOperationQueue.mainQueue(),
   usingBlock: { [weak self] (n: NSNotification) in
   guard let user = n.userInfo?["user"] as? User else {
   return
   }
   self?.reload(user)
   })
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7. Α͋͘Δ࣮૷
   // Model
   class User { … }
   API.fetchUser(id: id) { (user: User) in
   NSNotificationCenter.defaultCenter()
   .postNotificationName(
   "DidUserReceivedNotification",
   object: nil,
   userInfo: ["user": user])
   }
   // View
   NSNotificationCenter.defaultCenter().addObserverForName(
   "DidUserReceivedNotification",
   object: nil,
   queue: NSOperationQueue.mainQueue(),
   usingBlock: { [weak self] (n: NSNotification) in
   guard let user = n.userInfo?["user"] as? User else {
   return
   }
   self?.reload(user)
   })
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8. Α͋͘Δ࣮૷
   // Model
   class User { … }
   API.fetchUser(id: id) { (user: User) in
   NSNotificationCenter.defaultCenter()
   .postNotificationName(
   "DidUserReceivedNotification",
   object: nil,
   userInfo: ["user": user])
   }
   // View
   NSNotificationCenter.defaultCenter().addObserverForName(
   "DidUserReceivedNotification",
   object: nil,
   queue: NSOperationQueue.mainQueue(),
   usingBlock: { [weak self] (n: NSNotification) in
   guard let user = n.userInfo?["user"] as? User else {
   return
   }
   self?.reload(user)
   })
   ͍ͦ͒
   

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9. Α͋͘Δ࣮૷
   // Model
   class User { … }
   API.fetchUser(id: id) { (user: User) in
   NSNotificationCenter.defaultCenter()
   .postNotificationName(
   "DidUserReceivedNotification",
   object: nil,
   userInfo: ["user": user])
   }
   // View
   NSNotificationCenter.defaultCenter().addObserverForName(
   "DidUserReceivedNotification",
   object: nil,
   queue: NSOperationQueue.mainQueue(),
   usingBlock: { [weak self] (n: NSNotification) in
   guard let user = n.userInfo?["user"] as? User else {
   return
   }
   self?.reload(user)
   })
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   ड͚ͨΒʜ
   

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10. Α͋͘Δ࣮૷
    // Model
    class User { … }
    API.fetchUser(id: id) { (user: User) in
    NSNotificationCenter.defaultCenter()
    .postNotificationName(
    "DidUserReceivedNotification",
    object: nil,
    userInfo: ["user": user])
    }
    // View
    NSNotificationCenter.defaultCenter().addObserverForName(
    "DidUserReceivedNotification",
    object: nil,
    queue: NSOperationQueue.mainQueue(),
    usingBlock: { [weak self] (n: NSNotification) in
    guard let user = n.userInfo?["user"] as? User else {
    return
    }
    self?.reload(user)
    })
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11. Α͋͘Δ࣮૷
    // Model
    class User { … }
    API.fetchUser(id: id) { (user: User) in
    NSNotificationCenter.defaultCenter()
    .postNotificationName(
    "DidUserReceivedNotification",
    object: nil,
    userInfo: ["user": user])
    }
    // View
    NSNotificationCenter.defaultCenter().addObserverForName(
    "DidUserReceivedNotification",
    object: nil,
    queue: NSOperationQueue.mainQueue(),
    usingBlock: { [weak self] (n: NSNotification) in
    guard let user = n.userInfo?["user"] as? User else {
    return
    }
    self?.reload(user)
    })
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12. /4/PUJpDBUJPOͷͩΔ͍ͱ͜
    // Model
    class User { … }
    API.fetchUser(id: id) { (user: User) in
    NSNotificationCenter.defaultCenter()
    .postNotificationName(
    "DidUserReceivedNotification",
    object: nil,
    userInfo: ["user": user])
    }
    // View
    NSNotificationCenter.defaultCenter().addObserverForName(
    "DidUserReceivedNotification",
    object: nil,
    queue: NSOperationQueue.mainQueue(),
    usingBlock: { [weak self] (n: NSNotification) in
    guard let user = n.userInfo?["user"] as? User else {
    return
    }
    self?.reload(user)
    })
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15. ͡Ό͋
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16. class User {
    let id: Int
    let name: String
    init(id: Int, name: String) {
    self.id = id
    self.name = name
    }
    }
    

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17. struct User {
    let id: Int
    let name: String
    }
    

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18. View Slide

19. 
    

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20. public class NSNotification : NSObject, NSCopying, NSCoding
    {
    …
    public var userInfo: [NSObject : AnyObject]? { get }
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21. ΍͸Γ

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22. ͍͍͑ɺఘΊͳ͍Ͱʜʂ
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23. struct User {
    let id: Int
    let name: String
    }
    API.fetchUser(id: id) { (user: User) in
    NSNotificationCenter.defaultCenter()
    .postNotificationName(
    "DidUserReceivedNotification",
    object: nil,
    userInfo: ["user": user])
    }
    // error!!
    ˢ͜͜஫໨ʂ
    

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24. struct User {
    let id: Int
    let name: String
    }
    class UserContainer {
    let user: User
    init(user: User) {
    self.user = user
    }
    }
    API.fetchUser(id: id) { (user: User) in
    NSNotificationCenter.defaultCenter()
    .postNotificationName(
    "DidUserReceivedNotification",
    object: nil,
    userInfo: ["user": UserContainer(user: user))
    }
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25. Α͠
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26. ͍͚Δʜ͚Ͳ
    Πέͯͳ͍ʜ
    class UserContainer {
    let user: User
    init(user: User) {
    self.user = user
    }
    }
    

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30. ͜Ε͕ʜ
    // Model
    struct User { … }
    class PayloadContainer {
    let payload: Any
    init(payload: Any) { self.payload = payload }
    }
    API.fetchUser(id: id) { (user: User) in
    NSNotificationCenter.defaultCenter()
    .postNotificationName(
    "DidUserReceivedNotification",
    object: nil,
    userInfo: ["user": PayloadContainer(payload: user))
    }
    // View
    NSNotificationCenter.defaultCenter().addObserverForName(
    "DidUserReceivedNotification",
    object: nil,
    queue: NSOperationQueue.mainQueue(),
    usingBlock: { [weak self] (n: NSNotification) in
    guard let user = n.userInfo?["user"] as? User else {
    return
    }
    self?.reload(user)
    })
    

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31. ͜͏ͳΓ·͢
    // Model
    struct User { … }
    API.fetchUser(id: id) { (user: User) in
    Notifwift.post("DidUserReceivedNotification", payload: user)
    }
    // View
    let notifwift = Notifwift() // property
    notifwift.observe("DidUserReceivedNotification") {
    [weak self] (payload: User) in
    self?.reload(payload)
    }
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32. ࠷ऴతʹ͸͜͏ͳΔ
    // Model
    struct User { … }
    API.fetchUser(id: id) { (user: User) in
    Notifwift.post("DidUserReceivedNotification", payload: user)
    }
    // View
    let notifwift = Notifwift() // property
    notifwift.observe("DidUserReceivedNotification", block: reload)
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