加载网页——iOS学习连载28

- ( instancetype )initWithNibName:( NSString *)nibNameOrNil bundle:( NSBundle *)nibBundleOrNil
{
    self = [ super initWithNibName :nibNameOrNil bundle :nibBundleOrNil];
    if ( self )
    {
        self . hidesBottomBarWhenPushed = YES ;
    }
   
    return self ;
   
}

- ( void )viewDidLoad {
    [ super viewDidLoad ];

    // 新建网页视图
    webView = [[ UIWebView alloc ] initWithFrame : self . view . bounds ];
   
    // 网页视图自适应屏幕尺寸
    webView . scalesPageToFit = YES ;
   
    // 设置代理
    webView . delegate = self ;
   

//    // 加载 百度 网页

//    // 创建 request 对象

//    NSMutableURLRequest *mRequest = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"http://www.baidu.com"]];
//   
//    // 网页控件加载一个网络请求
//    [webView loadRequest:mRequest];
   
    [ self . view addSubview : webView ];
   
    // 初始化风火轮
    UIActivityIndicatorView *activity = [[ UIActivityIndicatorView alloc ] initWithActivityIndicatorStyle : UIActivityIndicatorViewStyleWhite ];
   
    UIBarButtonItem *rightBtn = [[ UIBarButtonItem alloc ] initWithCustomView :activity];
   
    self . navigationItem . rightBarButtonItem = rightBtn;
   
    [ self _loadData ];

}

// 加载本地 html 网页

- ( void )_loadData
{
    NSString *filePath = [[ NSBundle mainBundle ] pathForResource : @"news" ofType : @"html" ];
   
    NSError *error = nil ;
   
    NSString *str = [ NSString stringWithContentsOfFile :filePath encoding : NSUTF8StringEncoding error :&error];
   
    NSDictionary *dic = [ DataServiece requestData : news_detail ];
   
    NSString *title = [dic objectForKey : @"title" ];
    NSString *source = [dic objectForKey : @"source" ];
    NSString *time = [dic objectForKey : @"time" ];
    NSString *content = [dic objectForKey : @"content" ];
    NSString *author = [dic objectForKey : @"author" ];
   
    NSString *htmlStr = [ NSString stringWithFormat :str,title,source,time,content,author];
    [ webView loadHTMLString :htmlStr baseURL : nil ];
   
}

#pragma mark -UIWebViewDelegate
// 将要加载某个请求
- ( BOOL )webView:( UIWebView *)webView shouldStartLoadWithRequest:( NSURLRequest *)request navigationType:( UIWebViewNavigationType )navigationType
{
    return YES ;
}

// 已经开始加载
- ( void )webViewDidStartLoad:( UIWebView *)webView
{
    UIActivityIndicatorView *activity = ( UIActivityIndicatorView *) self . navigationItem . rightBarButtonItem . customView ;
    [activity startAnimating ];
}

// 结束加载
- ( void )webViewDidFinishLoad:( UIWebView *)webView
{
    UIActivityIndicatorView *activity = ( UIActivityIndicatorView *) self . navigationItem . rightBarButtonItem . customView ;
    [activity stopAnimating ];
}

// 加载出错
- ( void )webView:( UIWebView *)webView didFailLoadWithError:( NSError *)error
{
   

}