在iOS上使用自定义NSURLProtocol for file：// URL会导致“帧加载中断”错误

I want to load changing files into a UIWebView, and I want them to be loaded under the file:// scheme so I can include other file:// resources (such as html5 video elements) in my page. To do this I implement my own NSURLProtocol and override the loading of a subset of file:// URLs.I want to load changing files into a UIWebView,