iOS - 显示来自webview中的html资源文件或远程网页的内容

I am an iOS newbie. I want to have a function that loads the content from a local html resource file or a webpage depending on what is specified in a constant. How would I go about doing it? For eg, if I pass a file://... to the function or an https://... , it should render accordingly.I am an iOS newbie. I want to have a function t