iphone之打开pdf、doc、xls文件用UIWebView

//文件名字及类型
    NSString *path=[[NSBundle mainBundle]pathForResource:@"xls1" ofType:@"xls"];
    //获取内容
    NSData *data = [[NSData alloc]initWithContentsOfFile:path];
    NSString *string = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];
    NSLog(@"%@",string);
    
    UIWebView *webView = [[UIWebView alloc]initWithFrame:CGRectMake(0, 55, 320, 300)];
    webView.delegate = self;
    webView.multipleTouchEnabled = YES;
    webView.scalesPageToFit = YES;
    
    NSURL *url = [NSURL fileURLWithPath:path];
    NSURLRequest *request = [NSURLRequest requestWithURL:url];
    [webView loadRequest:request];
    
    [self.view addSubview:webView];