UIWebView 既可以load by url，還可以load html string。即你可以自己generate html string來用web view顯示。load html string 典型的應用是：url所對應的web page內容太多，如果只需要部分的html content，那麼可以通過http request擷取url的html content，然後只選取需要的部分，然後通過load html string來顯示。
自己產生的html，有時無法避免要使用local css, js or image （當然你也可以使用url來連結到網上的css/js/image）。
假設在你的ios app裡的resource folder裡已經存放了a webpage.css and a test.js，那麼你產生的html string應該這樣include them
NSString* htmlHeader=@"<html><head><style type='text/css'>@import url('webpage.css');</style><script type='text/javascript' charset='utf-8'
src='test.js'></script></head><body>";
NSString* htmlBody=@"<p> <img alt=\"dept\" src=\"https://www6.cityu.edu.hk/sa/images/30May12.jpg\" /></p>";
NSString* htmlFooter=@"</body></html>";
NSString* strHtml=[[NSString
alloc] initWithFormat:@"%@%@%@",htmlHeader,htmlBody,htmlFooter];
[webView
loadHTMLString:strHtml
baseURL:[NSURL
fileURLWithPath: [[NSBundle
mainBundle] resourcePath]
isDirectory: YES]];
注意：
1. baseURL就是你的resource folder path
2. 如果把<script type='text/javascript' charset='utf-8' src='test.js'></script>改成<script type='text/javascript' charset='utf-8' src='test.js' />則無法load js （ref
link:
http://stackoverflow.com/questions/7840127/uiwebview-loadhtmlstring-not-working-in-ios5）
3. 當你在ios project裡建立js或者把js添加進來後，by default .js檔案預設會被當作代碼被compiled （你在build project時就會看到warning），因此你需要將.js files從“compile sources” move to "Copy bundle resources"，見
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