xcode 如何获取重定向的 URL
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How to get Redirected URL
提问by user1673099
I have a URL.when i try to open it in browser, it will redirect to another URL & display the Content. I want that content But i don't get that redirected URL. So, I can't able to display data.
我有一个 URL。当我尝试在浏览器中打开它时，它会重定向到另一个 URL 并显示内容。我想要那个内容但是我没有得到那个重定向的 URL。所以，我无法显示数据。
How can i do that programmatically??
我怎样才能以编程方式做到这一点？
e.g. URL which i have :http://www.windpowerengineering.com/?p=11020
例如，我拥有的 URL：http : //www.windpowerengineering.com/?p=11020
& the redirected URL is:http://www.windpowerengineering.com/design/mechanical/blades/bladeless-turbine-converts-wind-into-fluid-power/
& 重定向的 URL 是：http : //www.windpowerengineering.com/design/mechanical/blades/bladeless-turbine-converts-wind-into-fluid-power/
I want this redirected URL. How can i get this?
我想要这个重定向的 URL。我怎样才能得到这个？
回答by J Shapiro
1) Specify that your class conforms to the UIWebViewDelegate protocol (and make sure your WebView's delegate outlet is connected to your view controller):
1) 指定您的类符合 UIWebViewDelegate 协议（并确保您的 WebView 的委托插座连接到您的视图控制器）：
@interface YourWebsiteViewController : UIViewController <UIWebViewDelegate>
2) Add the following delegate method:
2）添加以下委托方法：
-(void)webViewDidStartLoad:(UIWebView *)webView
{
NSURL *url = [webView.request mainDocumentURL];
NSLog(@"The Redirected URL is: %@", url);
}
Depending on what you're trying to do with this information, you might want to substitute #2 for this method (which will allow you the opportunity to prevent a page from loading):
根据您尝试使用此信息执行的操作，您可能希望用 #2 替换此方法（这将使您有机会阻止页面加载）：
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType
{
NSURL *url = [request mainDocumentURL];
NSLog(@"The Redirected URL is: %@", url);
// Return YES if you want to load the page, and NO if you don't.
return NO;
}
回答by Shamis Shukoor
use javascript
使用 JavaScript
document.referrer
回答by Roman
That URL is part of the http header. This is what happening:
该 URL 是 http 标头的一部分。这是正在发生的事情：
request 1: http://www.windpowerengineering.com/?p=11020
请求 1：http: //www.windpowerengineering.com/?p=11020
response 1: page has moved go to http://www.windpowerengineering.com/design/mechanical/blades/bladeless-turbine-converts-wind-into-fluid-power/
and then your browser will go:
然后你的浏览器会去：
请求 2：http: //www.windpowerengineering.com/design/mechanical/blades/bladeless-turbine-converts-wind-into-fluid-power/
response 3: here is the html
响应 3：这是 html
If you look at the http headers from response 1 you will be able to extract the url from the Locationheader. In Objective C this is one way to do it:
如果您查看响应 1 中的 http 标头，您将能够从Location标头中提取 url 。在 Objective C 中，这是一种方法：
NSURLResponse* response = // the response, from somewhere
NSDictionary* headers = [(NSHTTPURLResponse *)response allHeaderFields];
NSString* redirection_url = [headers objectForKey:@"Location"];
In the above code you can access all of the response http headers from the headersdictionary.
在上面的代码中，您可以访问headers字典中的所有响应 http 标头。
回答by Ramaraj T
Did you try this delegate method?
您是否尝试过这种委托方法？
-(BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
It will be called whenever the webview loads a webpage.
每当 webview 加载网页时都会调用它。
You can get the URL from one of this method's parameters, request
您可以从该方法的参数之一中获取 URL， request
NSURL *regURL=[request URL];
NSString *urlString=[regURL absoluteString];
