41 lines
1.2 KiB
Swift
41 lines
1.2 KiB
Swift
//
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// Handlerable.swift
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// VDS
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//
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// Created by Matt Bruce on 7/22/22.
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//
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import Foundation
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import Combine
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import UIKit
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public protocol Handlerable: AnyObject, Initable, Disabling, Surfaceable {
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/// Set of Subscribers for any Publishers for this Control.
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var subscribers: Set<AnyCancellable> { get set }
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/// Key of whether or not updateView() is called in setNeedsUpdate()
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var shouldUpdateView: Bool { get set }
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/// Function used to make changes to the View based off a change events or from local properties.
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func updateView()
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}
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extension Handlerable {
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/// Function called when there are changes in a View based off a change events or from local properties.
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public func setNeedsUpdate() {
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if shouldUpdateView {
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shouldUpdateView = false
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updateView()
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shouldUpdateView = true
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}
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}
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}
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extension Handlerable where Self: UIControl {
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/// Helper function to assign a completion block to a specific UIControl Event using Combine and stored in the subscribers.
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public func addEvent(event: UIControl.Event, block: @escaping (Self)->()) {
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publisher(for: event)
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.sink(receiveValue: { c in
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block(c)
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}).store(in: &subscribers)
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}
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}
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