87 lines
2.0 KiB
Swift
87 lines
2.0 KiB
Swift
//
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// UIBarButtonItem+Rx.swift
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// RxCocoa
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//
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// Created by Daniel Tartaglia on 5/31/15.
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// Copyright © 2015 Krunoslav Zaher. All rights reserved.
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//
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#if os(iOS) || os(tvOS)
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import UIKit
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#if !RX_NO_MODULE
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import RxSwift
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#endif
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var rx_tap_key: UInt8 = 0
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extension Reactive where Base: UIBarButtonItem {
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/**
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Bindable sink for `enabled` property.
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*/
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public var enabled: AnyObserver<Bool> {
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return UIBindingObserver(UIElement: self.base) { UIElement, value in
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UIElement.isEnabled = value
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}.asObserver()
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}
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/**
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Reactive wrapper for target action pattern on `self`.
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*/
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public var tap: ControlEvent<Void> {
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let source = lazyInstanceObservable(&rx_tap_key) { () -> Observable<Void> in
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Observable.create { [weak control = self.base] observer in
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guard let control = control else {
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observer.on(.completed)
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return Disposables.create()
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}
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let target = BarButtonItemTarget(barButtonItem: control) {
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observer.on(.next())
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}
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return target
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}
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.takeUntil(self.deallocated)
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.share()
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}
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return ControlEvent(events: source)
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}
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}
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@objc
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class BarButtonItemTarget: RxTarget {
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typealias Callback = () -> Void
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weak var barButtonItem: UIBarButtonItem?
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var callback: Callback!
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init(barButtonItem: UIBarButtonItem, callback: @escaping () -> Void) {
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self.barButtonItem = barButtonItem
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self.callback = callback
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super.init()
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barButtonItem.target = self
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barButtonItem.action = #selector(BarButtonItemTarget.action(_:))
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}
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override func dispose() {
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super.dispose()
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#if DEBUG
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MainScheduler.ensureExecutingOnScheduler()
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#endif
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barButtonItem?.target = nil
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barButtonItem?.action = nil
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callback = nil
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}
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func action(_ sender: AnyObject) {
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callback()
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}
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}
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#endif
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