在 NSString 中解码 Base-64 编码的 PNG

问题描述

我有一些 NSData 是 Base-64 编码的，我想对其进行解码，我看到了一个看起来像这样的示例

I have some NSData which is Base-64 encoded and I would like to decode it, I have seen an example that looks like this

NSData* myPNGData = [xmlString dataUsingEncoding:NSUTF8StringEncoding];

[Base64 initialize];
NSData *data = [Base64 decode:img];
cell.image.image = [UIImage imageWithData:myPNGData];

然而，这给了我很多错误，我想知道如何才能让它工作.我需要将某种类型的文件导入到我的项目中还是必须包含框架?

However this gives me a load of errors, I would like to know what to do in order to get this to work. Is there some type of file I need to import into my project or do I have to include a framework?

这些是我得到的错误

Use of undeclared identifier 'Base64'
Use of undeclared identifier 'Base64'
Use of undeclared identifier 'cell'

我到处找，不知道什么是正确的做法.

I have looked everywhere and cannot figure out what is the proper thing to do.

推荐答案

NSData Base64 库文件 会帮助你.

#import "NSData+Base64.h"

//Data from your string is decoded & converted to UIImage
UIImage *image = [UIImage imageWithData:[NSData
dataFromBase64String:strData]];

希望对你有帮助

Swift 3 版本

几乎一样

//Create your NSData object
let data = NSData(base64Encoded: "yourStringData", options: NSData.Base64DecodingOptions.ignoreUnknownCharacters)

//And then just create a new image based on the data object
let image = UIImage(data: data as! Data)

Swift 2.3 版本

//Create your NSData object
let data = NSData(base64EncodedString: "yourStringData", options: .IgnoreUnknownCharacters)

//And then just create a new image based on the data object
let image = UIImage(data: data!)

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