How to clear UIWebView cache?

 网上搜的的几种说法，也不知道对不对。

//to prevent internal caching of webpages in application 
NSURLCache *sharedCache= [[NSURLCache alloc] initWithMemoryCapacity:0 diskCapacity:0 diskPath:nil]; 
[NSURLCache setSharedURLCache:sharedCache]; 
[sharedCache release]; 
sharedCache = nil; 

 

原文网址：http://stackoverflow.com/questions/2523435/how-to-clear-uiwebview-cache