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82 lines
2.0 KiB
Swift
82 lines
2.0 KiB
Swift
//
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// UIGestureRecognizer+Rx.swift
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// Touches
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//
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// Created by Carlos García on 10/6/15.
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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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// This should be only used from `MainScheduler`
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class GestureTarget: RxTarget {
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typealias Callback = (UIGestureRecognizer) -> Void
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let selector = Selector("eventHandler:")
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weak var gestureRecognizer: UIGestureRecognizer?
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var callback: Callback?
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init(_ gestureRecognizer: UIGestureRecognizer, callback: Callback) {
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self.gestureRecognizer = gestureRecognizer
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self.callback = callback
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super.init()
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gestureRecognizer.addTarget(self, action: selector)
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let method = self.methodForSelector(selector)
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if method == nil {
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fatalError("Can't find method")
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}
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}
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func eventHandler(sender: UIGestureRecognizer!) {
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if let callback = self.callback, gestureRecognizer = self.gestureRecognizer {
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callback(gestureRecognizer)
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}
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}
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override func dispose() {
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super.dispose()
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self.gestureRecognizer?.removeTarget(self, action: self.selector)
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self.callback = nil
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}
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}
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extension UIGestureRecognizer {
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/**
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Reactive wrapper for gesture recognizer events.
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*/
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public var rx_event: ControlEvent<UIGestureRecognizer> {
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let source: Observable<UIGestureRecognizer> = Observable.create { [weak self] observer in
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MainScheduler.ensureExecutingOnScheduler()
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guard let control = self else {
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observer.on(.Completed)
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return NopDisposable.instance
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}
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let observer = GestureTarget(control) {
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control in
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observer.on(.Next(control))
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}
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return observer
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}.takeUntil(rx_deallocated)
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return ControlEvent(events: source)
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}
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}
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#endif
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