iOS开发 获取图片中的颜色

直接扩展 UImage 获取图片中的颜色

extension UIImage{
    //pos 坐标点
    func getPixelColor(pos:CGPoint) -> UIColor {
        let pixelData = CGDataProviderCopyData(CGImageGetDataProvider(self.CGImage))
        let data = CFDataGetBytePtr(pixelData)
        let pixelInfo = ((Int(self.size.width) * Int(pos.y)) + Int(pos.x)) * 4
        
        let red = CGFloat(data[pixelInfo]) / 255
        let green = CGFloat(data[pixelInfo + 1]) / 255
        let blue = CGFloat(data[pixelInfo + 2]) / 255
        let alpha = CGFloat(data[pixelInfo + 3]) / 255
        
        let color = UIColor(red: red, green: green, blue: blue, alpha: alpha) 
        return color
    }
}

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第三方库 ColorCube

github 地址 ：ColorCube

ColorCube