UIWebView 如何检测 <img src="..."/>被窃听

How UIWebView detect lt;img src=quot;...quot; /gt; is tapped(UIWebView 如何检测 lt;img src=quot;...quot;/gt;被窃听)

问题描述

我知道下面的方法可以检测链接元素点击.但是我想知道 UIView 是否可以检测到 img 元素是否被点击?

I know that method below can detect a link element tap. But I want to know if the UIView can detect if the img element is tapped?

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
switch (navigationType) {
    case UIWebViewNavigationTypeLinkClicked:
        NSLog(@"link is click");
        //do something
        break;
    default:
        break;
   }

    return true;
}

一些html源代码如下:

Some html source like below:

<p>xxxxxxxxx</p>
<p><img src="aHR0cDovL2ltZ3MuZWJydW4uY29tL3Jlc291cmNlcy8yMDE1XzA2LzIwMTVfMDZfMTYvMjAxNTA2MTY3OTExNDM0NDEzNzg3NTQ2LmpwZw=="> </p>
<p>xxxxxxxxx。</p>
<p><img src="aHR0cDovL2ltZ3MuZWJydW4uY29tL3Jlc291cmNlcy8yMDE1XzA2LzIwMTVfMDZfMTYvMjAxNTA2MTY3OTExNDM0NDEzNzg3NTQ2LmpwZw=="> </p>
<p>xxxxxxxxx。</p>

你能告诉我如何使用示例代码来做到这一点吗?谢谢.

Could you show me how to do it using sample code? Thanks.

推荐答案

你的img标签没有html点击事件.如果你可以像下面这样制作你的图像 -

Your img tag does not have html click event. If you can make your image like below way -

<p>xxxxxxxxx</p>
<p><img src="aHR0cDovL2ltZ3MuZWJydW4uY29tL3Jlc291cmNlcy8yMDE1XzA2LzIwMTVfMDZfMTYvMjAxNTA2MTY3OTExNDM0NDEzNzg3NTQ2LmpwZw==" onclick="myfunction()"> </p>
<p>xxxxxxxxx。</p>
<p><img src="aHR0cDovL2ltZ3MuZWJydW4uY29tL3Jlc291cmNlcy8yMDE1XzA2LzIwMTVfMDZfMTYvMjAxNTA2MTY3OTExNDM0NDEzNzg3NTQ2LmpwZw==" onclick="myfunction()"> </p>
<p>xxxxxxxxx。</p>

然后您可以在 UIWebView 委托方法中捕获您的 img 点击事件 - shouldStartLoadWithRequest.

Then you can catch your img click event within UIWebView Delegate method - shouldStartLoadWithRequest.

其他可能的选项 -

否则，您已经编写了一个 javascript 方法，该方法将 OnClick 方法动态添加到所有 IMG 标记.并在您的页面加载到 UIWebView 时调用此 javascript 方法 -

Otherwise you have write a javascript method which dynamically add OnClick method to all IMG tags. And call this javascript method when your page load in UIWebView -

- (void) webViewDidFinishLoad:(UIWebView *)webView
{
    //Execute javascript method or pure javascript if needed
    [_webView stringByEvaluatingJavaScriptFromString:@"methodName();"];
}

这篇关于UIWebView 如何检测 <img src="..."/>被窃听的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持编程学习网！