UIWebView基本介绍

最新推荐文章于 2022-08-21 14:02:22 发布

TommyYaphetS

最新推荐文章于 2022-08-21 14:02:22 发布

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分类专栏： iOS 基础 iOS UI 文章标签： UIWebView

本文链接：https://blog.youkuaiyun.com/hmt20130412/article/details/24588043

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本文介绍如何使用 iOS 的 UIWebView 控件加载优酷网站，并实现基本的网页导航功能，如前进、后退等。同时展示了如何处理 UIWebView 的加载状态变更及加载失败的情况。

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- (void)viewDidLoad
{
    [super viewDidLoad];
	// Do any additional setup after loading the view.
    
    UIWebView * webView = [[UIWebView alloc]initWithFrame:CGRectMake(0, 20, ScreenWidth, ScreenHeight-20)];
    // 自动队页面进行缩放以适应屏幕
    webView.scalesPageToFit = YES;
    webView.userInteractionEnabled = YES;
    webView.opaque = YES;
    
    [self.view addSubview:webView];
    
    NSURL * url = [NSURL URLWithString:@"http://www.youku.com"];
    NSURLRequest * request = [NSURLRequest requestWithURL:url];
    [webView loadRequest:request];
//    NSString * myHT = @"优酷";
//    [webView loadHTMLString:myHT baseURL:url];
/*
    [webView goBack];        // 返回
    [webView goForward];     // 前往
    [webView reload];
    [webView stopLoading];
  */
    webView.delegate = self;
    
    //移除滚动后的外边阴影
    UIScrollView *scrollView = webView.scrollView;
    for (int i = 0; i < scrollView.subviews.count ; i++) {
        UIView *view = [scrollView.subviews objectAtIndex:i];
        if ([view isKindOfClass:[UIImageView class]]) {
            view.hidden = YES ;
        }
    }
}

#pragma mark - UIWebViewDelegate
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{

    /**
     *  typedef NS_ENUM(NSInteger, UIWebViewNavigationType) {
     *  UIWebViewNavigationTypeLinkClicked,
     *  UIWebViewNavigationTypeFormSubmitted,
     *  UIWebViewNavigationTypeBackForward,
     *  UIWebViewNavigationTypeReload,
     *  UIWebViewNavigationTypeFormResubmitted,
     *  UIWebViewNavigationTypeOther
     };
     */
    
    NSLOG_FUNCTION;
    
    return YES;
}

// 开始加载
- (void)webViewDidStartLoad:(UIWebView *)webView{

    NSLOG_FUNCTION;
    
}

// 完成加载
-  (void)webViewDidFinishLoad:(UIWebView *)webView{

    NSLOG_FUNCTION;
    
}

// 加载失败,弹出错误提示
- (void)webView:(UIWebView *)webView didFailLoadWithError:(NSError *)error{

    UIAlertView *alterview = [[UIAlertView alloc] initWithTitle:@"" message:[error localizedDescription]
                                                       delegate:nil cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
    [alterview show];
    [alterview release];
    NSLOG_FUNCTION;

}