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added NSManagedObject.setValue(_:forKvcKey:willSetValue:didSetValue:)

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John Rommel Estropia
2017-05-21 09:06:29 +09:00
parent 303fea4ebe
commit 3f268e8376
1 changed files with 5 additions and 2 deletions
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7
Sources/NSManagedObject+Convenience.swift
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@@ -155,16 +155,19 @@ public extension NSManagedObject {
- parameter value: the value to set the KVC key with
- parameter KVCKey: the KVC key
- parameter willSetValue: called before accessing `setPrimitiveValue(forKey:)`. Callers are allowed to cancel the mutation by throwing an error, for example, for custom validations.
- parameter didSetValue: called after executing `setPrimitiveValue(forKey:)`.
*/
@nonobjc @inline(__always)
public func setValue<T>(_ value: T, forKvcKey KVCKey: KeyPath, willSetValue: (T) throws -> Any?) rethrows {
public func setValue<T>(_ value: T, forKvcKey KVCKey: KeyPath, willSetValue: (T) throws -> Any?, didSetValue: (Any?) -> Void = { _ in }) rethrows {
self.willChangeValue(forKey: KVCKey)
defer {
self.didChangeValue(forKey: KVCKey)
}
self.setPrimitiveValue(try willSetValue(value), forKey: KVCKey)
let transformedValue = try willSetValue(value)
self.setPrimitiveValue(transformedValue, forKey: KVCKey)
didSetValue(transformedValue)
}
/**