[super viewDidLoad];      webview=[[UIWebView alloc] initWithFrame:self.view.bounds];    [self.view addSubview: webview];        [webview release];    // Do any additional setup after loading the view, typically from a nib. //沙盒中读取文件     NSString *doc=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];    doc=[doc stringByAppendingPathComponent:@"liuyan.html"];    NSLog(@"%@",doc);        NSURL *url=[NSURL fileURLWithPath:doc];    NSLog(@"%@",url);   NSURLRequest *request=[NSURLRequest requestWithURL:url];    [webview loadRequest:request];}