mastodon-ios/Mastodon/Vender/ActivityIndicatorNode.swift

76 lines
2.3 KiB
Swift

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