如何在swift中从base64字符串创建GIF

I am getting base64 string with extension and I want to convert base64 string to GIF and display it in ImageView. I am using iOSDevCenters+GIF.swift file. I am getting NSData from string but when data converted in image, its giving nil.Below is my code:

我得到base64字符串扩展名,我想将base64字符串转换为GIF并在ImageView中显示它。我正在使用iOSDevCenters + GIF.swift文件。我从字符串获取NSData但是当在图像中转换数据时,它给出nil.Below是我的代码:

let imageData = profileImageString.data(using: .utf8)
self.thumbnailMedia.image = UIImage.gifImageWithData(imageData!)

Does anybody have any ideas on how to do this?

有没有人对如何做到这一点有任何想法?

1 个解决方案

#1

If you are starting from a base64 string, you should decode it as a base64 string not UTF8.

如果从base64字符串开始,则应将其解码为base64字符串而不是UTF8。

if let data = Data(base64Encoded: imageDataString) {
    let image = UIImage(data: data)
}

This snippet simply takes the encode image string, decode into a Data object and create an image from the data.
If you are working a lot using base64 string I strongly suggest you to extend the String structure functionalities.

此片段只需获取编码图像字符串,解码为Data对象并根据数据创建图像。如果你使用base64字符串工作很多,我强烈建议你扩展String结构的功能。

extension String {
    //: ### Base64 encoding a string
    func base64Encoded() -> String? {
        if let data = self.data(using: .utf8) {
            return data.base64EncodedString()
        }
        return nil
    }

    //: ### Base64 decoding a string
    func base64Decoded() -> String? {
        if let data = Data(base64Encoded: self) {
            return String(data: data, encoding: .utf8)
        }
        return nil
    }
}

This snippet was taken from Github, credits to Stringer.

这个片段取自Github,归功于Stringer。

Also another way is use the extension created by Leo Dabus that is compliant with Swift convention:

另一种方法是使用Leo Dabus创建的符合Swift约定的扩展:

extension String {
    var data:          Data  { return Data(utf8) }
    var base64Encoded: Data  { return data.base64EncodedData() }
    var base64Decoded: Data? { return Data(base64Encoded: self) }
}

extension Data {
    var string: String? { return String(data: self, encoding: .utf8) }
}

#1