本文介绍了使用 JavaScript 的 UIWebView CSS 注入的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!
问题描述
我正在尝试将本地 css 文件注入完成加载网站(如 google 等)的 UIWebView.
I'm trying to inject a local css file into an UIWebView that finished loading website such as google etc.
我正在尝试使用 JavaScript,但没有成功.
I'm trying with JavaScript but with no success.
- (void)webViewDidFinishLoad:(UIWebView *)webView {
NSString *cssPath = [[NSString alloc] initWithString:[[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:@"styles.css"]];
NSURL *baseURL = [NSURL fileURLWithPath:cssPath];
NSString *js = [NSString stringWithFormat:@"var fileref = document.createElement('link');
fileref.setAttribute('rel', 'stylesheet');
fileref.setAttribute('type', 'text/css');
fileref.setAttribute('href', %@);", baseURL];
[webView stringByEvaluatingJavaScriptFromString:js];
}
谢谢,
推荐答案
要将 javascript 注入 Web 视图,您必须在 html 中显式编写.
To inject javascript into a web view you must explicitly write in the html.
我在 javascript scrollTo 函数中写了一个例子:
An example of this is here where I wrote in a javascript scrollTo function:
- (void)webViewDidFinishLoad:(UIWebView *)webView {
[webView stringByEvaluatingJavaScriptFromString:@"var script = document.createElement('script');"
"script.type = 'text/javascript';"
"script.text = "function myFunction() { "
"window.scrollTo(100,100)"
"}";"
"document.getElementsByTagName('head')[0].appendChild(script);"];
[webView stringByEvaluatingJavaScriptFromString:@"myFunction();"];}
此代码将整个脚本标签和 myFunction 写入 HTML 的头部
This code writes the entire script tags and the myFunction into the head of the HTML
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