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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| // | ||
| // ExplosionAnimation.swift | ||
| // Demo | ||
| // | ||
| // Created by Artur Rymarz on 21.04.2018. | ||
| // Copyright © 2018 Artrmz. All rights reserved. | ||
| // | ||
|
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| import UIKit | ||
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| public extension UIView { | ||
| public func explode(size: GridSize = GridSize(columns: 10, rows: 10)) { | ||
| guard let screenshot = self.screenshot, !isHidden else { | ||
| return | ||
| } | ||
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| let pieces = calculatePieces(for: screenshot, size: size) | ||
| explodeAnimation(with: pieces) | ||
| } | ||
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| // TODO: extract some methods between both animations (break glass and explosion) | ||
| private func explodeAnimation(with pieces: [ExplosionPiece]) { | ||
| let animationView = UIView() | ||
| animationView.clipsToBounds = true | ||
| animationView.frame = self.frame | ||
| guard let superview = self.superview else { | ||
| return | ||
| } | ||
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| self.isHidden = true | ||
| superview.addSubview(animationView) | ||
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| let pieceLayers = showJointPieces(pieces, animationView: animationView) | ||
| } | ||
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| // TODO: extract for both animations | ||
| private func showJointPieces(_ pieces: [ExplosionPiece], animationView: UIView) -> [CALayer] { | ||
| var allPieceLayers = [CALayer]() | ||
| for index in 0..<pieces.count { | ||
| let piece = pieces[index] | ||
| let pieceLayer = CALayer() | ||
| pieceLayer.contents = piece.image.cgImage | ||
| pieceLayer.frame = CGRect(x: piece.position.x, y: piece.position.y, width: piece.image.size.width, height: piece.image.size.height) | ||
| animationView.layer.addSublayer(pieceLayer) | ||
| allPieceLayers.append(pieceLayer) | ||
| } | ||
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| return allPieceLayers | ||
| } | ||
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| private func calculatePieces(for image: UIImage, size: GridSize) -> [ExplosionPiece] { | ||
| var pieces = [ExplosionPiece]() | ||
| let columns = size.columns | ||
| let rows = size.rows | ||
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| let singlePieceSize = CGSize(width: image.size.width / CGFloat(columns), height: image.size.height / CGFloat(rows)) | ||
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| for row in 0..<rows { | ||
| for column in 0..<columns { | ||
| // TODO: wrong scale? | ||
| let position = CGPoint(x: CGFloat(column) * singlePieceSize.width, y: CGFloat(row) * singlePieceSize.height) | ||
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| let cropRect = CGRect(origin: position, size: singlePieceSize) | ||
| guard | ||
| let cgImage = image.cgImage, | ||
| let pieceCgImage = cgImage.cropping(to: cropRect) | ||
| else { | ||
| continue | ||
| } | ||
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| let pieceImage = UIImage(cgImage: pieceCgImage) | ||
| let piece = ExplosionPiece(position: position, image: pieceImage) | ||
| pieces.append(piece) | ||
| } | ||
| } | ||
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| return pieces | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,14 @@ | ||
| // | ||
| // ExplosionPiece.swift | ||
| // Demo | ||
| // | ||
| // Created by Artur Rymarz on 21.04.2018. | ||
| // Copyright © 2018 Artrmz. All rights reserved. | ||
| // | ||
|
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||
| import UIKit | ||
|
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| struct ExplosionPiece { | ||
| let position: CGPoint | ||
| let image: UIImage | ||
| } |
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