如何从 UIWebView 中的 Base64 字符串加载 PDF [英] How to load a PDF from a Base64 string in a UIWebView

问题描述

我正在使用返回 Base64 字符串的 API，如下所示:

I'm using an API that is returning a Base64 string, something like this:

data:application/pdf;base64,**BASE64STRING**

BASE64STRING 是我显示 PDF 所需要的.

Where BASE64STRING is what I need to display the PDF.

到目前为止，我只创建了一个获取 Base64 字符串的 Data 对象:

So far I only created a Data object that gets the Base64 string:

let data = Data(base64Encoded: BASE64STRING)

我尝试在 webview 中加载它:

And I tried to load it in the webview:

webView.load(data!, mimeType: "application/pdf", textEncodingName: "", baseURL: URL(string: "")!)

问题是我没有本地PDF文件，所以不知道应该在baseURL中放什么.目前它给了我一个 fatal error: unexpectedly found nil while unwrapping an Optional value

The problem is that I don't have a local PDF file, so I don't know what I should put in baseURL. Currently it's giving me a fatal error: unexpectedly found nil while unwrapping an Optional value

如何在 webView 中加载 PDF?有没有更好的方法来做到这一点?

How can I load the PDF in the webView? Is there any better way to do that?

推荐答案

我解决了这个问题，尽管我不确定这是否是一个好方法，解决方案是将任何有效的 URL 放入 baseUrl:

I solved the problem, despite that I'm not sure if it's a good approach, the solution is to put any valid URL in baseUrl:

webView.load(data!, mimeType: "application/pdf", textEncodingName: "", baseURL: URL(string: "https://www.google.com")!)

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