直接主题：Android或iOS webView图片的点击事件处理。

一、Android

1. webView自定义的webViewClient做如下处理

@Override
 public void onPageFinished(WebView view, String url) {
      view.getSettings().setJavaScriptEnabled(true);
      addImageClickListner(view);
 }

private void addImageClickListner(WebView contentWebView) {
        // 这段js函数的功能就是，遍历所有的img几点，并添加onclick函数，函数的功能是在图片点击的时候调用本地java接口并传递url过去
        contentWebView.loadUrl("javascript:(function(){" +
                "var objs = document.getElementsByTagName(\"img\"); " +
                "for(var i=0;i<objs.length;i++)  " +
                "{"
                + "    objs[i].onclick=function()  " +
                "    {  "
                + "        window.android.openImage(this.src);  " +
                "    }  " +
                "}" +
                "})()");
    }

其中window.android.openImage(this.src);中的android为自定义标识

2. webView

webView.addJavascriptInterface(new JSInterface(), "android");

其中JSInterface为自定义，android对应webViewClient中的window.android.openImage()

3. JSInterface中代码

public class JSInterface {
        public JSInterface() {

        }

        @JavascriptInterface
        public void openImage(String img) {
            // img即获取到图片的点击事件，该如何处理自己看着需求。
            Intent intent = new Intent(getActivity(), PhotoViewActivity.class);
            intent.putExtra((PhotoViewActivity.Intent_PhotoViewActivity_photo, img);
            startActivity(intent);
        }
    }

二、iOS

两个UIWebView代理的使用：

- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    [webView stringByEvaluatingJavaScriptFromString:@"javascript:(function(){ var objs = document.getElementsByTagName(\"img\"); for(var i=0;i<objs.length;i++)  { objs[i].onclick=function() { window.location.href= \"iOS://openImage:/\" + this.src} }})()"];
}

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
    NSString *urlString = [[request URL] absoluteString];
    NSArray *urlComps = [urlString componentsSeparatedByString:@"://"];

    if([urlComps count] && [[urlComps objectAtIndex:0] isEqualToString:@"iOS"])
    {
        NSString *funcStr = [urlComps objectAtIndex:1];
        if ([funcStr containsString:@"openImage"]) {
            NSString *imgSrc = [urlComps objectAtIndex:2];
            //  imgUrl即为图片地址
            NSString *imgUrl = [NSString stringWithFormat:@"http://%@", imgSrc];
        }
        return NO;
    }
    return YES;
}

注：两个代理中"iOS"为标识