Swift 中带“/”的 Base64Encoding 结果字符串

Question

我想将 UIImage 转换为字符串表示形式。我正在使用以下代码：

let imageData = UIImagePNGRepresentation(resizedImage)

if let imageBase64 = imageData?.base64EncodedDataWithOptions(NSDataBase64EncodingOptions (rawValue: 0)) {
    let strBase64:String = imageBase64.base64EncodedStringWithOptions(NSDataBase64EncodingOptions(rawValue: 0))
}

生成的字符串类似于：

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

但我要查找的格式应该包含“/”，如下（我随机找到的图像）：

/9j/4AAQSkZJRgABAQAAAQABAAD/2wCEAAkGBxMTEhUSEhMWFRUWGBcZGRgXFxcVFRgYFxUWFhcVFxgYHSggGBolGxcXITEhJSkrLi4uFx8zODMtNygtLisBCgoKDg0OGhAQGisdHx0tLS0tKy0tLS0tLSstLS0tLS0tLS0tKy0tLS0tLSstLS0tLSs3Ky0tKysrLSstKysrK//AABEIAMwAzAMBIgACEQEDEQH/xAAcAAABBAMBAAAAAAAAAAAAAAAGAgMEBQABBwj/xABCEAABAwIDBQUGAwYFBAMBAAABAgMRAAQSITEFBkFRYRMicYGRBzJCobHRFCPBUmKCk+HwM0NTctIVkqLxRGOyJP/

我不知道如何获取第二种格式（包含“/”）。

Answer 1

你编码了两次。就这样

let strBase64 = imageData?.base64EncodedStringWithOptions([])

Swift 中带“/”的 Base64Encoding 结果字符串

Base64Encoding result string with "/" in Swift

string

base64

swift