在UIWebView中提交表单 [英] Submit a form in UIWebView
问题描述
我在UIWebView中有一个表单与Web服务交互，当我提交表单时，数据被发送到Web服务，它会将结果返回给另一个UIWebView。两个UIWebViews位于导航控制器下，因此当使用提交表单时，它会滑动到另一个视图以显示结果。任何人都可以指出我如何实现这一目标？我在表单元素中填写action属性是什么？如何将用户输入返回给应用程序，以便我可以使用Web服务？我是这个领域的新手，任何帮助将不胜感激。谢谢！
I have a form in the UIWebView to interact with a web service, when I submit the form, the data gets sent to a web service and it will return the result to another UIWebView. The two UIWebViews are under a navigation controller, so when the use submits the form, it slides to another view to display the result. Can anyone point me out how I can achieve this? What do I fill in the "action" attribute in the form element? How can I get the user input back to the application so I can use the web service? I am new to this field, any help will be appreciated. Thanks!
更新：
有没有办法保存表格从Web视图回到我的程序的数据？我认为最好将表单数据保存回程序（即将params存入nsstring），然后单击提交按钮，然后开始查询Web服务。
Is there a way to save form data from web view back to my program? I think it's better to save form data back to the program (i.e. store params into nsstring) when I click submit button, and then start querying web service.
推荐答案
你可以使用
stringByEvaluatingJavaScriptFromString
从目标c触发javascript方法并从该方法获取返回值的函数。
function for firing a javascript method from objective c and get a return value from that method.
例如
//Calling the getTheUsername in the javascript.
NSString *userName = [yourWebView stringByEvaluatingJavaScriptFromString:@"getTheUsername()"];
和javascript
and in javascript
//Method in javascript
function getTheUsername()
{
return userNameVariable;
}
我怀疑你在这里反之亦然（请致电obj-来自javascript的c方法）。这不能直接在这里完成。
And I doubt that here you may wanna do vice-versa (Call obj-c method from javascript). This cannot be done directly here is the work around.
设置UIWebViewDelegate，并实现webView方法：shouldStartLoadWithRequest：navigationType：。在您的JavaScript代码中，导航到一些伪造的URL，该URL会对您要传递给应用的信息进行编码，例如：
window.location =someLink：// yourApp / form_Submitted：param1：param2：param3;
在您的委托方法中，查找这些虚假URL，提取您需要的信息，采取适当的操作，并返回NO以取消导航。
Set a UIWebViewDelegate, and implement the method webView:shouldStartLoadWithRequest:navigationType:. In your JavaScript code, navigate to some fake URL that encodes the information you want to pass to your app, like, say: window.location = "someLink://yourApp/form_Submitted:param1:param2:param3"; In your delegate method, look for these fake URLs, extract the information you need, take whatever action is appropriate, and return NO to cancel the navigation.
- (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{
NSLog(@"%@",[[request URL] query]);
return YES;
}
这篇关于在UIWebView中提交表单的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
