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- (void)viewDidLoad {
    [super viewDidLoad];
    //网页视图
    _webView = [[UIWebView alloc]initWithFrame:CGRectMake(0, 20, self.view.bounds.size.width,self.view.bounds.size.height)];
    _webView.delegate = self;
    [_webView setScalesPageToFit:YES];
    _webView.backgroundColor = [UIColor colorWithRed:240/255.0 green:240/255.0 blue:240/255.0 alpha:1];
    [self.view addSubview:_webView];
    /*
     1.把本地html文件后缀名改为.bundle
     2.把改过的.bundle文件导进项目
     */
    //第一个参数是网页文件名
    //第二个参数是html后缀名
    //第三个参数是文件名加后缀名
    NSURL *url = [[NSBundle mainBundle] URLForResource:@"index" withExtension:@"html" subdirectory:@"网页.bundle"];
    NSURLRequest *request=[NSURLRequest requestWithURL:url];
    [_webView loadRequest:request];
    
   
}