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I'm loading a html page in a web view and I want to apply a local css file. I'm receiving the html in a string from a server and the css will be in my app. For example here I want to display "Hello!" in red.
self.articleView = UIWebView(frame : CGRect(x : self.articleButton.frame.minX, y : self.articleButton.frame.maxY + 1, width : self.frame.width - 20, height: self.frame.height - self.articleButton.frame.maxY - 10));
self.articleView.backgroundColor = UIColor.clearColor();
self.addSubview(self.articleView);
self.articleView.loadHTMLString("<html><body><h1>Hello!</h1></body></html>", baseURL: nil)
Do you know how to apply the css ? Should I try with a WKWebView ?
Thanks in advance.
757
Add delegate method of UIWebView like this
func webViewDidFinishLoad(webView: UIWebView) {
if let path = Bundle.main.path(forResource: "styles", ofType: "css") {
let javaScriptStr = "var link = document.createElement('link'); link.href = '%@'; link.rel = 'stylesheet'; document.head.appendChild(link)"
let javaScripthPath = String(format: javaScriptStr, path)
self.articleView.stringByEvaluatingJavaScript(from: javaScripthPath)
}
//Second way
do {
let cssContent = try NSString(contentsOfFile: path, encoding: NSUTF8StringEncoding as NSStringEncoding);
let javaScrStr = "var style = document.createElement('style'); style.innerHTML = '%@'; document.head.appendChild(style)"
let JavaScrWithCSS = NSString(format: javaScrStr, cssContent)
self.articleView.stringByEvaluatingJavaScriptFromString(JavaScrWithCSS as String)
} catch let error as NSError {
print(error);
}
}
Hope this will help you.
87
If you are loading CSS from external file or from multiline string, don't forget to replace occurrences of newline \n like this:
cssString.replacingOccurrences(of: "\n", with: "")
Without this innerHtml will not work (because it don't know \n so it's not valid) and show you an error.
44
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