当加载包含图像的文档(例如MicrosoftWorddocx文件)时，无论缓存策略如何，UIWebView都会在收到内存警告时始终缓存图像。下面是一个示例代码片段:NSURLCache*sharedCache=[[NSURLCachealloc]initWithMemoryCapacity:1024*1024diskCapacity:0diskPath:[NSTemporaryDirectory()stringByAppendingPathComponent:@"URLCache"]];[NSURLCachesetSharedURLCache:sharedCache];NSURLReq