72 lines
2.3 KiB
Swift
72 lines
2.3 KiB
Swift
// ref: https://github.com/Adlai-Holler/ASDKPlaceholderTest/blob/eea9fa7cff2d16a57efb47d208422ea9b49a630a/ASDKPlaceholderTest/ASDisplayNodeSubclasses.swift
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import Foundation
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import AsyncDisplayKit
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import UIKit
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/**
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A node that shows a `UIActivityIndicatorView`. Does not support layer backing.
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Note: You must not change the style to or from `.WhiteLarge` after init, or the node's size will not update.
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*/
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class ActivityIndicatorNode: ASDisplayNode {
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private static let defaultSize = CGSize(width: 20, height: 20)
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private static let largeSize = CGSize(width: 37, height: 37)
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init(style: UIActivityIndicatorView.Style = .medium) {
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super.init()
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setViewBlock {
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UIActivityIndicatorView(style: style)
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}
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self.style.preferredSize = style == .large ? ActivityIndicatorNode.defaultSize : ActivityIndicatorNode.largeSize
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}
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var activityIndicatorView: UIActivityIndicatorView {
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return view as! UIActivityIndicatorView
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}
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override func didLoad() {
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super.didLoad()
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if animating {
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activityIndicatorView.startAnimating()
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}
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activityIndicatorView.color = color
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activityIndicatorView.hidesWhenStopped = hidesWhenStopped
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}
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/// Wrapper for `UIActivityIndicatorView.hidesWhenStopped`. NOTE: You must respect thread affinity.
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var hidesWhenStopped = true {
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didSet {
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if isNodeLoaded {
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assert(Thread.isMainThread)
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activityIndicatorView.hidesWhenStopped = hidesWhenStopped
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}
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}
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}
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/// Wrapper for `UIActivityIndicatorView.color`. NOTE: You must respect thread affinity.
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var color: UIColor? {
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didSet {
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if isNodeLoaded {
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assert(Thread.isMainThread)
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activityIndicatorView.color = color
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}
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}
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}
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/// Wrapper for `UIActivityIndicatorView.animating`. NOTE: You must respect thread affinity.
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var animating = false {
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didSet {
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if isNodeLoaded {
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assert(Thread.isMainThread)
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if animating {
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activityIndicatorView.startAnimating()
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} else {
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activityIndicatorView.stopAnimating()
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}
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}
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}
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}
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}
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