在UIWebView（iOS）中聆听事件 [英] Listening for events in a UIWebView (iOS)

问题描述

我正在尝试从我在iOS应用程序中的UIWebView中打开的网页中收听一个事件（特别是一个按钮点击）。我知道在其他语言中有一些方法可以将事件监听器附加到某些Web调用中，但是我还没有找到在Objective-C中执行此操作的方法。我还没有找到任何人在线说谁不能完成，所以我决定我应该问。我在文档中看到可以使用Javascript来进行Objective-C调用，但是我无法控制我想要监视的网页。所以我需要一个解决方案，让我可以在Objective-C中完全听取这个事件。

I'm trying to listen for an event (specifically a button click) from a webpage I have opened in a UIWebView in my iOS app. I know that in other languages there are ways to attach event listeners to certain web calls, but I haven't yet found a way to do it in Objective-C. I also haven't found anyone online who says it can't be done, so I decided I should ask. I saw in the documentation that you can make Objective-C calls from Javascript, but I do not have control of the webpage I am wanting to monitor. So I need a solution that allows me to listen for this event entirely in Objective-C.

编辑：如果细节有帮助，我试图让用户做Facebook上的墙柱。我正在UIWebview（http://www.facebook.com/sharer/sharer.php?u=）中加载Facebook sharer页面，并希望监控用户何时点击共享链接，以便关闭网页视图

If specifics would help, I am trying to allow the user to make a wallpost on Facebook. I am loading the Facebook sharer page in a UIWebview (http://www.facebook.com/sharer/sharer.php?u=) and wanting to monitor when the user clicks "Share Link" so that I can close the web view.

谢谢大家的时间！

推荐答案

使用UIWebViewDelegate：

You can use the UIWebViewDelegate:

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType

UIWebViewNavigationType值为：

The UIWebViewNavigationType values are :

enum {
  UIWebViewNavigationTypeLinkClicked,
  UIWebViewNavigationTypeFormSubmitted,
  UIWebViewNavigationTypeBackForward,
  UIWebViewNavigationTypeReload,
  UIWebViewNavigationTypeFormResubmitted,
  UIWebViewNavigationTypeOther
};typedef NSUInteger UIWebViewNavigationType;

可以检查一下，然后看NSURLRequest获取有关

Can check this and then look at the NSURLRequest to get info about that

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