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zhaorui/Resize UIImage

Created October 17, 2016 09:28
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Resize UIImage
let image = UIImage(named: "car.jpg")
let hasAlpha = false
let scale: CGFloat = 0.0 // Automatically use scale factor of main screen
UIGraphicsBeginImageContextWithOptions(CGSize(width: 80, height:80), !hasAlpha, scale)
image?.draw(in: CGRect(origin: CGPoint(x: 0, y: 0), size: CGSize(width: 80, height: 80)))
let scaledImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
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