快速将UIImage转换为base64字符串 [英] Convert UIImage to base64 string in swift

问题描述

我正在尝试将UIImage转换为base64字符串，目的是将其上传到后端服务器.

I'm trying to convert a UIImage to a base64 string with the goal of uploading it to a back-end server.

但是，我在本文中找到的转换代码(应该是Apple自己的实现)会生成无效的字符串:

However, the conversion code I found in this article (which should be Apple's own implementation) generates an invalid string:

在UIImage和Base64字符串之间转换

上传后，我得到了这张图片:

After upload, I get this image:

[从iOS转换的base64解码的故障图像 1

[Failty image that is decoded from iOS converted base64 1

代替此:

[通过在线base64转换工具解码的正确图像 2

[Correct image decoded from an online base64 conversion tool2

我使用Postman测试了上传结果，后端正确处理了有效的base64图像，因此我将错误缩小到了base64转换本身.这是我的代码:

I tested the upload results using Postman and the back-end handles a valid base64 image correctly, so I narrowed the bug down to the base64 conversion itself. Here's my code:

public extension UIImage
{
     func base64Encode() -> String?
    {
        guard let imageData = UIImagePNGRepresentation(self) else
        {
            return nil
        }

        let base64String = imageData.base64EncodedStringWithOptions(NSDataBase64EncodingOptions.Encoding64CharacterLineLength)
        let fullBase64String = "data:image/png;base64,\(base64String))"

        return fullBase64String
    }
}

您知道在将iOS设备上的base64输出上传到服务器之前如何解决该问题吗?

Any idea how I could fix my base64 output on my iOS device before I upload it to the server?

推荐答案

执行以下操作:

用于编码:

data.base64EncodedStringWithOptions([])

用于解码:

let url = URL(string: String(format:"data:application/octet-stream;base64,%@",base64String))
do {
    let data =  try Data(contentsOf: url!)
}catch {

}

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