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A super simple and performant way to make any view wobble in tvOS
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// | |
// WobbleView.swift | |
// WobbleView | |
// | |
// Created by Matt Jones on 4/28/16. | |
// Copyright © 2016 WillowTree, Inc. All rights reserved. | |
// | |
import UIKit | |
class WobbleView: UIView { | |
var focusedFrameGuide: UILayoutGuide { | |
return renderedWobbleView.focusedFrameGuide | |
} | |
private var renderedWobbleView: UIImageView = { | |
let view = UIImageView() | |
view.adjustsImageWhenAncestorFocused = true | |
view.translatesAutoresizingMaskIntoConstraints = false | |
return view | |
}() | |
override func willMoveToSuperview(newSuperview: UIView?) { | |
super.willMoveToSuperview(newSuperview) | |
renderedWobbleView.removeFromSuperview() | |
renderedWobbleView.image = nil | |
} | |
override func didMoveToSuperview() { | |
super.didMoveToSuperview() | |
guard let superview = superview else { | |
return | |
} | |
superview.addSubview(renderedWobbleView) | |
renderedWobbleView.topAnchor.constraintEqualToAnchor(self.topAnchor).active = true | |
renderedWobbleView.bottomAnchor.constraintEqualToAnchor(self.bottomAnchor).active = true | |
renderedWobbleView.leftAnchor.constraintEqualToAnchor(self.leftAnchor).active = true | |
renderedWobbleView.rightAnchor.constraintEqualToAnchor(self.rightAnchor).active = true | |
} | |
override func didAddSubview(subview: UIView) { | |
super.didAddSubview(subview) | |
setNeedsLayout() | |
} | |
override func layoutSubviews() { | |
super.layoutSubviews() | |
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0)) { | |
UIGraphicsBeginImageContextWithOptions(self.bounds.size, false, 0) | |
CGContextTranslateCTM(UIGraphicsGetCurrentContext(), 0, 0) | |
self.layer.hidden = false | |
self.layer.renderInContext(UIGraphicsGetCurrentContext()!) | |
let image = UIGraphicsGetImageFromCurrentImageContext() | |
UIGraphicsEndImageContext() | |
dispatch_async(dispatch_get_main_queue()) { | |
self.renderedWobbleView.image = image | |
self.hidden = true | |
} | |
} | |
} | |
} |
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