由网友(总被自己萌哭)分享简介：我有一个的UIWebView ，一个页面有一个AJAX组件，其含量的变化，当用户点击一个按钮。我怎么能知道，当内容已经内加载了的UIWebView ？I have a UIWebView and one page has an AJAX component whose content changes when the...

我有一个的UIWebView ，一个页面有一个AJAX组件，其含量的变化，当用户点击一个按钮。我怎么能知道，当内容已经内加载了的UIWebView ？

I have a UIWebView and one page has an AJAX component whose content changes when the user clicks a button. How can I know when the content has loaded inside the UIWebView?

推荐答案

您需要做两件事情：

在你的JavaScript code，有 XMLHTT prequest 的信号，即AJAX请求完成了自定义网址：

In your JavaScript code, have the XMLHTTPRequest signal that the AJAX request is complete with a custom URL:

var req = new XMLHttpRequest();  
req.open('GET', 'http://www.mozilla.org/', true);  
req.onreadystatechange = function (aEvt) {  
  if (req.readyState == 4) {  
     if(req.status == 200) { 
       window.location = "myspecialurl:foo"
     }
  }  
};  

在您的本地code，你需要实现一个的UIWebView 委托监听这个自定义网址：

In your native code, you'll need to implement a UIWebView delegate that listens for this custom URL:

- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType 
{
  if([[[request URL] absoluteString] isEqualToString:@"myspecialurl:foo"]) {
     // Your code for when the AJAX request completes.
     return NO;
  }
  return YES;
}

没有保证，这code解析/编译但应该给你的想法如何做到这一点。

No assurances this code parses/compiles but should give you the idea how to do it.