像素颜色的UIImage到UIColor数组

// 将UIImage对象转换为CGImage对象
guard let cgImage = image.cgImage else {
    return
}

// 获取图片的宽度和高度
let width = cgImage.width
let height = cgImage.height

// 创建一个与CGImage相关联的颜色空间
let colorSpace = CGColorSpaceCreateDeviceRGB()

// 创建一个用于存储像素颜色值的数组
var colors = [UIColor]()

// 创建一个与CGImage相关联的上下文对象
guard let context = CGContext(data: nil, width: width, height: height, bitsPerComponent: 8, bytesPerRow: width * 4, space: colorSpace, bitmapInfo: CGImageAlphaInfo.noneSkipLast.rawValue) else {
    return
}

// 在上下文中绘制CGImage
context.draw(cgImage, in: CGRect(x: 0, y: 0, width: width, height: height))

// 获取像素数据
guard let data = context.data else {
    return
}

// 遍历像素数据并转换为UIColor对象
let buffer = data.bindMemory(to: UInt32.self, capacity: width * height)
for i in 0..<(width * height) {
    let color = buffer[i]
    
    // 从像素颜色值中提取红、绿、蓝、透明度分量
    let red = CGFloat((color >> 16) & 0xFF) / 255.0
    let green = CGFloat((color >> 8) & 0xFF) / 255.0
    let blue = CGFloat(color & 0xFF) / 255.0
    let alpha = CGFloat((color >> 24) & 0xFF) / 255.0
    
    // 创建UIColor对象并将其添加到数组中
    let uiColor = UIColor(red: red, green: green, blue: blue, alpha: alpha)
    colors.append(uiColor)
}

// 打印UIColor数组
print(colors)