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AnyܕΛprotocolʹΩϟετ͢Δ࣌ʹ
ؾΛ͚ͭͨํ͕͍͍
2019/5/21 ͋Δ͋ΔLT vol4
PKPK-Carnage(Tomosuke Okada)
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About me
• iOSྺ2ͪΐͬͱ
• Qiita → @PKPK-Carnage
• Github → PKPK-Carnage
• Twitter → @PKPK-Carnage
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ͦΜͳͷ؆୯͡ΌΜ
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Any as? Protocol
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ྫɿNotification
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protocol Animal {}
struct Dog: Animal {}
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ྫɿNotification
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class HogeClass {
func postNotification() {
// DogΛૹΔ
NotificationCenter.default.post(
name: .init("Animal"),
object: Dog()
)
}
}
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ྫɿNotification
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class FugaClass {
init() {
NotificationCenter.default.addObserver(
self,
selector: #selector(self.didReceivedNotification(_:)),
name: .init("Animal"),
object: nil
)
}
@objc
func didReceivedNotification(_ notification: Notification) {
}
}
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ྫɿNotification
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@objc
func didReceivedNotification(_ notification: Notification) {
// notification.objectͷதΛग़ྗ͢Δ
print("\(String(describing: notification.object))")
// notification.objectΛAnimal(Protocol)ʹΩϟετͨ͠ޙͷதΛग़ྗ͢Δ
let animal = notification.object as? Animal
print("\(String(describing: animal))")
}
Optional(__lldb_expr_11.Dog())
nil
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SR-3871
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SR-3871
• Swiftͷstructʹas AnyObjectΛߦͬͯɺAnyܕʹ֨ೲͨ࣌͠ʹɺ
Protocolͷ४ڌఆ͕ߦ͑ͳ͘ͳΔόά͕͋Δ
• AnyܕͷΦϒδΣΫτʹas AnyObjectΛߦ͑ɺͪΌΜͱProtocol
ͷ४ڌఆ͕ߦ͑ΔΑ͏ʹͳΔɻ
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࣮ࡍʹͬͯΈͨ
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@objc
func didReceivedNotification(_ notification: Notification) {
// notification.objectͷதΛग़ྗ͢Δ
print("\(String(describing: notification.object))")
// notification.objectΛAnimal(Protocol)ʹΩϟετͨ͠ޙͷதΛग़ྗ͢Δ
let animal = notification.object as? Animal
print("\(String(describing: animal))")
}
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࣮ࡍʹͬͯΈͨ
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@objc
func didReceivedNotification(_ notification: Notification) {
// notification.objectͷதΛग़ྗ͢Δ
print("\(String(describing: notification.object))")
// notification.objectΛAnimal(Protocol)ʹΩϟετͨ͠ޙͷதΛग़ྗ͢Δ
let animal = (notification.object as AnyObject) as? Animal
print("\(String(describing: animal))")
}
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࣮ࡍʹͬͯΈͨ
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Optional(__lldb_expr_11.Dog())
Optional(__lldb_expr_11.Dog())
@objc
func didReceivedNotification(_ notification: Notification) {
// notification.objectͷதΛग़ྗ͢Δ
print("\(String(describing: notification.object))")
// notification.objectΛAnimal(Protocol)ʹΩϟετͨ͠ޙͷதΛग़ྗ͢Δ
let animal = (notification.object as AnyObject) as? Animal
print("\(String(describing: animal))")
}
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Qiitaॻ͖·ͨ͠
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https://qiita.com/PKPK-Carnage/items/5e2eda7735aa24f807a9
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͓ΘΓ
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