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New Library for CoreData
Hiroshi Kimura
potatotips #19
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ଜ
Hiroshi Kimura
iOS Developer
eureka, Inc.
@muukii0803
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CoreStore
https://github.com/JohnEstropia/CoreStore
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Developer
Hiroshi Kimura
eureka, Inc.
@muukii0803
John Estropia
eureka, Inc.
@JohnEstropia
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Good things :)
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Good things :)
• SwiftͰॻ͔Ε͍ͯΔ
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Good things :)
• SwiftͰॻ͔Ε͍ͯΔ
• ϝΠϯεϨουͷContextRead-Only
ॻ͖ࠐΈͯ͢SerialʹBackgroundContextͰߦΘΕΔͨΊɺ
҆શʹಈ࡞͢Δઃܭ
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Good things :)
• SwiftͰॻ͔Ε͍ͯΔ
• ϝΠϯεϨουͷContextRead-Only
ॻ͖ࠐΈͯ͢SerialʹBackgroundContextͰߦΘΕΔͨΊɺ
҆શʹಈ࡞͢Δઃܭ
• ෳͷSQLiteϑΝΠϧ͕༻Մೳ (ConfigurationͰ͚Δ)
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Good things :)
• SwiftͰॻ͔Ε͍ͯΔ
• ϝΠϯεϨουͷContextRead-Only
ॻ͖ࠐΈͯ͢SerialʹBackgroundContextͰߦΘΕΔͨΊɺ
҆શʹಈ࡞͢Δઃܭ
• ෳͷSQLiteϑΝΠϧ͕༻Մೳ (ConfigurationͰ͚Δ)
• Observer͕༻ҙ͞Ε͍ͯΔ (FRCΛॻ͔ͳͯ͘ྑ͘ͳΔ)
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Good things :)
• SwiftͰॻ͔Ε͍ͯΔ
• ϝΠϯεϨουͷContextRead-Only
ॻ͖ࠐΈͯ͢SerialʹBackgroundContextͰߦΘΕΔͨΊɺ
҆શʹಈ࡞͢Δઃܭ
• ෳͷSQLiteϑΝΠϧ͕༻Մೳ (ConfigurationͰ͚Δ)
• Observer͕༻ҙ͞Ε͍ͯΔ (FRCΛॻ͔ͳͯ͘ྑ͘ͳΔ)
• ϚΠάϨʔγϣϯΛαϙʔτ
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Usage
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DataStack
struct Stack {
static let data: DataStack = {
let dataStack = DataStack(modelName: "CoreData")
dataStack.addSQLiteStoreAndWait(
"CoreData.sqlite",
configuration: nil,
resetStoreOnMigrationFailure: true
)
return dataStack
}()
}
SQLiteʹඥͮ͘DataStackΛੜ͠·͢
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struct Stack {
static let dataA: DataStack = {
let dataStack = DataStack(modelName: "StackSetupDemo")
dataStack.addSQLiteStoreAndWait(
"CoreData.sqlite",
configuration: "Configuration_A",
resetStoreOnMigrationFailure: true
)
return dataStack
}()
static let dataB: DataStack = {...}
static let dataC: DataStack = {...}
}
Configuration͝ͱʹDataStackͷੜ͕Մೳ
ࠓճConfigurationΛΘͳ͍ํ๏ͰਐΊ͍͖ͯ·͢ɻ
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let people = Stack.data.fetchAll(
From(MyPersonEntity),
Where("age > 30"),
OrderBy(.Ascending("name"), .Descending("age")),
Tweak { (fetchRequest) -> Void in
fetchRequest.includesPendingChanges = false
}
)
Fetch
NSSortDescriptor, NSPredicateΘͣʹࢦఆ
ࡉ͔͍ઃఆTweakͰࢦఆՄೳ
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Stack.data.beginAsynchronous { (transaction) -> Void in
let qrcode = transaction.create(Into(QRCode))
let codes = transaction.fetch( . . . )
transaction.commit() { result in
switch result {
case .Success(let hasChanges):
success?()
case .Failure(let error):
failure?(error: error)
}
}
}
Create - Update
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ViewController
Fetch - Observe
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Fetch
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Controller͔ΒCoreDataΛ͏࣌ͬͯ
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Controller͔ΒCoreDataΛ͏࣌ͬͯ
NSFetchedResultsController ?
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Controller͔ΒCoreDataΛ͏࣌ͬͯ
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Controller͔ΒCoreDataΛ͏࣌ͬͯ
ManagedObjectListController
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var codes: ManagedObjectListController = {
return Stack.data.observeObjectList(
From(QRCode),
Where("removed == false”),
OrderBy(.Descending("readAt"))
)
}()
Controllerʹදࣔ͢ΔΦϒδΣΫτͷ݅Λࢦఆ
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codes.numberOfSections()
SectionͷΛऔಘ
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codes.numberOfObjectsInSection(section)
Section͔ΒObjectͷΛऔಘ
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let code = codes[indexPath]
NSIndexPath͔ΒObjectΛऔಘ
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Observe
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codes.removeObserver(self)
codes.addObserver(self)
Observe
Observeͷ։࢝
Observeͷऴྃ
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protocol ManagedObjectListChangeObserver
• WillChange
• Insert
• Delete
• Update
• Move
• InsertSection
• deleteSection
• DidChange
GenericsͰ࣮͞Ε͍ͯΔͨΊɺas ͕ෆཁ
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Conclusion
• DataStackΛϕʔεʹಈ࡞͢Δ
• Fetchͷهड़͕γϯϓϧ
• DataStack͝ͱʹγϦΞϧΩϡʔͰಈ࡞͢ΔͨΊ҆શ
• ViewControllerͱͷ࿈ܞ͕؆୯
• ϚΠάϨʔγϣϯ͕ॆ࣮
ΠϯΫϦϝϯλϧʹϚΠάϨʔγϣϯ͢Δ͜ͱՄೳ
• GenericsͰ࣮͞Ε͍ͯΔͨΊμΠφϛοΫΩϟετ͕ݮΒͤΔ
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Swift2.0
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Thank you :)
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Thank you :)