如何在 iphone uiwebview 中处理 iframe/frames dom

发布于 2024-08-28 01:20:44 字数 584 浏览 5 评论 0原文

在

(void) webViewDidFinishLoad: (UIWebView*)webView

我注入一些 javascript 来处理 iframe。例如，

    stringByEvaluatingJavaScriptFromString: 
@"try {
    var document = window.document.getElementsByTagName('iframe')[0].contentWindow.document.getElementsByTagName('frame'); 
    } catch (e) {
    alert (e.message);
    }"

它告诉我 iframes 文档未定义。实际上我尝试打印 iframe 的 contentWindow 的所有属性，但它完全是空的。

我知道每个帧加载可能会调用 webViewDidFinishLoad 多次。但我永远无法获取 iframe 文档。我认为至少在所有 iframe 准备好后应该有。

有人可以告诉我如何获取 iframe 文档来处理 uiwebview 中的 dom 吗？

谢谢

原文

(void) webViewDidFinishLoad: (UIWebView*)webView

I inject some javascript to handle the iframes. e.g.

    stringByEvaluatingJavaScriptFromString: 
@"try {
    var document = window.document.getElementsByTagName('iframe')[0].contentWindow.document.getElementsByTagName('frame'); 
    } catch (e) {
    alert (e.message);
    }"

It tells me the iframes document is undefined. Actually I have tried to print all the properties of contentWindow of iframe, but it's totally empty.

I know the webViewDidFinishLoad may be called several times for each frame load. But I can never get the iframe document. I thought there should be at least once all the iframes are ready.

Could someone please tell me how to get the iframe document to process the dom in the uiwebview?

Thanks

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