如何在Swift中将base64String转换为String?

本文介绍了如何在Swift中将base64String转换为String?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我正在从NSData中的Web服务响应中接收到base64String，如何快速将base64String转换为String?

I am receiving a base64String from webservice response in NSData, how to convert that base64String to String in swift?

//Code var jsonResult = NSJSONSerialization.JSONObjectWithData(data, options: NSJSONReadingOptions.MutableContainers, error: &err) as! NSDictionary // Response JSON from webservice var base64String : String = "" base64String = jsonResult["Base64String"] as! String // Retrieve base64String as string from json response println("Base64String Alone: \(base64String)") // Code to decode that base64String let decodedData = NSData(base64EncodedString: base64String, options: NSDataBase64DecodingOptions(rawValue: 0)) println("Decoded: \(decodedData)") let decodedString = NSString(data: decodedData!, encoding: NSUTF8StringEncoding) println(decodedString) // Prints nil

base64String的编码和解码对于仅包含文本的文件非常有效，如果文件包含某些表格式/图像，则编码和解码都会给出无效的base64String.如何将文件转换为base64String进行编码和解码，无论文件内容如何? 文件格式为doc，docx，pdf，txt

Encode and decode of base64String works well for the files containing only text, if a file contains some table formats/images both encoding and decoding gives an invalid base64String. How to convert a file into base64String encode and decode whatever the contents of file ? File formats are doc, docx, pdf, txt

预先感谢您的帮助！

推荐答案

尝试一下

let base64Encoded = "YW55IGNhcm5hbCBwbGVhc3VyZS4=" let decodedData = Data(base64Encoded: base64Encoded)! let decodedString = String(data: decodedData, encoding: .utf8)! print(decodedString) println(decodedString)

确保您的base 64编码字符串有效

make sure your base 64 encoded string is valid