61 lines
2.0 KiB
Swift
61 lines
2.0 KiB
Swift
//
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// NSObject+Rx+KVORepresentable.swift
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// RxCocoa
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//
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// Created by Krunoslav Zaher on 11/14/15.
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// Copyright © 2015 Krunoslav Zaher. All rights reserved.
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//
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#if !os(Linux)
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import Foundation
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import RxSwift
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/// Key value observing options
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public struct KeyValueObservingOptions: OptionSet {
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/// Raw value
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public let rawValue: UInt
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public init(rawValue: UInt) {
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self.rawValue = rawValue
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}
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/// Whether a sequence element should be sent to the observer immediately, before the subscribe method even returns.
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public static let initial = KeyValueObservingOptions(rawValue: 1 << 0)
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/// Whether to send updated values.
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public static let new = KeyValueObservingOptions(rawValue: 1 << 1)
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}
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extension Reactive where Base: NSObject {
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/**
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Specialization of generic `observe` method.
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This is a special overload because to observe values of some type (for example `Int`), first values of KVO type
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need to be observed (`NSNumber`), and then converted to result type.
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For more information take a look at `observe` method.
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*/
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public func observe<Element: KVORepresentable>(_ type: Element.Type, _ keyPath: String, options: KeyValueObservingOptions = [.new, .initial], retainSelf: Bool = true) -> Observable<Element?> {
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return self.observe(Element.KVOType.self, keyPath, options: options, retainSelf: retainSelf)
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.map(Element.init)
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}
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}
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#if !DISABLE_SWIZZLING && !os(Linux)
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// KVO
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extension Reactive where Base: NSObject {
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/**
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Specialization of generic `observeWeakly` method.
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For more information take a look at `observeWeakly` method.
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*/
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public func observeWeakly<Element: KVORepresentable>(_ type: Element.Type, _ keyPath: String, options: KeyValueObservingOptions = [.new, .initial]) -> Observable<Element?> {
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return self.observeWeakly(Element.KVOType.self, keyPath, options: options)
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.map(Element.init)
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}
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}
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#endif
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#endif
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