Created
June 9, 2017 15:04
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Rendering layer in background thread
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| let selfWidth = Int(width) | |
| let selfHeight = Int(height) | |
| let selfSize = CGSize(width: selfWidth, height: selfHeight) | |
| let title = advertisementTitle | |
| SearchPageAdvertisementView.renderQueue.async { | |
| let asyncLayer = SearchPageAdvertisementLayer() | |
| asyncLayer.title = title | |
| asyncLayer.drawsAsynchronously = true | |
| asyncLayer.frame = CGRect(origin: .zero, size: CGSize(width: selfWidth, height: selfHeight)) | |
| UIGraphicsBeginImageContextWithOptions(selfSize, true, 0) | |
| if let context = UIGraphicsGetCurrentContext() { | |
| asyncLayer.render(in: context) | |
| let layerImage = UIGraphicsGetImageFromCurrentImageContext() | |
| if let cgImage = layerImage?.cgImage { | |
| DispatchQueue.main.async { [weak self] in | |
| self?.layer.contents = cgImage | |
| } | |
| } | |
| } | |
| UIGraphicsEndImageContext() | |
| } |
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