将图像数据转换为Varbinary

Question

我正在尝试将iOS设备上的图片文件上传到远程SQL Server的VARBINARY（MAX）列，但遇到了困难。

基本上我需要将UIImage转换为我需要插入的内容：

INSERT INTO table (ImageColumn) VALUES ('byteString here')

列类型是：VARBINARY（MAX），我可以通过以下方式打印字符串：

let imageData = UIImagePNGRepresentation(value)
let base64String = imageData?.base64EncodedString()
imageBase64 = base64String!
print(imageBase64) // this prints all the string

这甚至会将8-9mb的数据写入列，但它总是被破坏。我不知道我的sql查询字符串是否完全错误

编辑：快速修复

        let value_resized = value.resizedTo1MB()
        let imageData = UIImageJPEGRepresentation(value_resized!, 0)
        let strBase64 = imageData?.base64EncodedString(options: .lineLength64Characters)
        imageBase64 = strBase64!
// i can insert imageBase64 to sql as a string

extension UIImage {

func resized(withPercentage percentage: CGFloat) -> UIImage? {
    let canvasSize = CGSize(width: size.width * percentage, height: size.height * percentage)
    UIGraphicsBeginImageContextWithOptions(canvasSize, false, scale)
    defer { UIGraphicsEndImageContext() }
    draw(in: CGRect(origin: .zero, size: canvasSize))
    return UIGraphicsGetImageFromCurrentImageContext()
}

func resizedTo1MB() -> UIImage? {
    guard let imageData = UIImagePNGRepresentation(self) else { return nil }

    var resizingImage = self
    var imageSizeKB = Double(imageData.count) / 1000.0 

    while imageSizeKB > 1000 { 
        guard let resizedImage = resizingImage.resized(withPercentage: 0.9),
            let imageData = UIImagePNGRepresentation(resizedImage)
            else { return nil }

        resizingImage = resizedImage
        imageSizeKB = Double(imageData.count) / 1000.0 
    }

    return resizingImage
}
}