UIWebView

1、加载网络链接

webView?.loadRequest(URLRequest(url: URL(string: urlStr)))

2、加载本地文件

let filePath = Bundle.main.path(forResource: "doc1.doc", ofType: nil)
// 方式一：
webView?.loadRequest(URLRequest(url: URL(string: filePath)))

// 方式二：
let url = URL(fileURLWithPath: filePath)
let data = try! Data(contentsOf: url)
/**
mimeType：文件的类型
加载文本数据：
       1、application/docx
       2、application/doc
       3、application/vnd.openxmlformats-officedocument.wordprocessingml.document

加载xlsx数据：application/xlsx
加载PDF数据：application/pdf
*/
webView?.load(data, mimeType: "application/doc", textEncodingName: "utf-8", baseURL: url)

UIWKWebView

1、加载网络链接

webView?.loadRequest(URLRequest(url: URL(string: urlStr)))

2、加载本地文件

let filePath = Bundle.main.path(forResource: "doc1.doc", ofType: nil)
let url = URL(fileURLWithPath: filePath)
wkWebView?.loadFileURL(url, allowingReadAccessTo: url)