
[英]How to intercept a WKWebView request to detect which local resource files (css, js, png, …) load together with a HTML file?
[英]How to load CSS file by using URL in WKWebView
我想通过使用 URL 链接注入CSS ,
在职的
在代码下面工作,如果我将 CSS 文件存储在项目的Bundle路径中,
lazy var webView: WKWebView = {
guard let path = Bundle.main.path(forResource: "style", ofType: "css") else {
return WKWebView()
}
let cssString = try! String(contentsOfFile: path).components(separatedBy: .newlines).joined()
let source = """
var style = document.createElement('style');
style.innerHTML = '\(cssString)';
document.head.appendChild(style);
"""
let preferences = WKPreferences()
preferences.setValue(true, forKey:"developerExtrasEnabled")
let userScript = WKUserScript(source: source,
injectionTime: .atDocumentEnd,
forMainFrameOnly: true)
let userContentController = WKUserContentController()
userContentController.addUserScript(userScript)
let configuration = WKWebViewConfiguration()
configuration.userContentController = userContentController
configuration.preferences = preferences
let webView = WKWebView(frame: .zero,
configuration: configuration)
webView.navigationDelegate = self
webView.scrollView.isScrollEnabled = false
webView.scrollView.bounces = false
return webView
}()
期待
我有 CSS 文件,它存储在我们的服务器中,有一些路径链接可以说,
所以我想通过使用 URL 链接应用style.css文件,
Please help me to apply CSS file by using URL only, I don't want to store it in bundle, bundle CSS file is already working for me, our CSS style will change dynamically so I want apply URL link CSS file.
您可以像下载任何其他文件类型一样下载远程 css 文件。
这是一个简单的例子(注意:只是一个例子!!! -不打算成为生产代码:):
func gotTheCSS(_ css: String) -> Void {
print(css)
// here is where you would inject it, just like you did when
// loading it from the bundle
}
override func viewDidLoad() {
super.viewDidLoad()
DispatchQueue.global().async {
if let url = URL(string: "http://yoursite.com/css/style.css") {
do {
let cssString = try String(contentsOf: url, encoding: String.Encoding.utf8)
self.gotTheCSS(cssString)
}
catch {
print(error)
}
}
}
}
感谢人们对我的问题的帮助/建议/答案。
我找到了解决方案,通过使用 Z2C56C3605804D854E48C608D47Z 的Z2C56C3605804D854E48C608D47Z文件应用 CSS 文件
使用 CSS 文件的后端服务器链接,例如,
let cssURL "https://xyz/styles/style.css" // Use your server css file url link
然后使用 JavaScript 注入问题,所以,我已经将 JavaScript 注入代码样式更改为如下代码所示链接,我在“覆盖 func viewDidAppear(_ animated: Bool)”方法中编写的所有代码,只需复制粘贴代码,它就可以为您工作出色地。
let source = """
var link = document.createElement('link');
link.href = '\(url)';
link.rel= 'stylesheet'
document.head.appendChild(link);
"""
let userScript = WKUserScript(source: source,
injectionTime: .atDocumentEnd,
forMainFrameOnly: true)
let userContentController = WKUserContentController()
userContentController.addUserScript(userScript)
let configuration = WKWebViewConfiguration()
configuration.userContentController = userContentController
self.webView = WKWebView(frame: self.documentDiscriptionView.bounds,
configuration: configuration)
self.webView.navigationDelegate = self
self.webView.scrollView.isScrollEnabled = false
self.webView.scrollView.bounces = false
self.webView.isOpaque = false
self.webView.backgroundColor = UIColor.clear
self.webView.scrollView.backgroundColor = UIColor.clear
self.self.webViewContainerView.addSubview( self.webView)
///// Set Constraint
self.webView.translatesAutoresizingMaskIntoConstraints = false
self.webView.leadingAnchor.constraint(equalTo: self.webViewContainerView.leadingAnchor, constant: 0).isActive = true
self.webView.trailingAnchor.constraint(equalTo: self.webViewContainerView.trailingAnchor, constant: 0).isActive = true
self.webView.topAnchor.constraint(equalTo: self.webViewContainerView.topAnchor, constant: 0).isActive = true
self.webView.bottomAnchor.constraint(equalTo: self.webViewContainerView.bottomAnchor, constant: 0).isActive = true
我的问题现在已经解决了,希望这个解决方案能帮助有人通过使用链接申请 css,如果有人想要任何帮助申请 CSS 到 Z9F0268549B4CDC23EFC36A9670C90E2,请告诉我
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