UIWebView可以与应用程序交互（沟通）吗？ [英] Can a UIWebView interact (communicate) with the app?

问题描述

我去使用UIWebView来显示动态内容，而不是使用UI元素。是否有可能触发本机应用程序功能从简单地击中UIWebView内的链接？示例：点击链接，然后切换当前视图？

I went to use UIWebView to display dynamic content, instead of doing it natively using UI-elements. Is it possible to trigger native app functions from simply hitting links inside the UIWebView? Example: hitting a link which then switches current View?

推荐答案

是的，这是可能的。在你的html中，你写一个JS加载一个假冒方案的URL，如

Yes, it's possible. In your html, you write a JS to load a URL with a fake scheme such as

window.location = "request_for_action://anything/that/is/a/valid/url/can/go/here";

然后，在您的iOS代码中，为您的webView分配一个委托， / p>

Then, in your iOS code, assign a delegate to your webView, and in your delegate, handle

webView:shouldLoadWithRequest:navigationType

与

if( [request.URL.scheme isEqualToString: @"request_for_action"] )
{
   // parse your custom URL to extract parameter, use URL parts or query string as you like
   return NO; // return NO, so webView won't actually try to load this fake request
}

-

另一方面，让iOS代码通过
使用

Just an aside, you can do the other way, let iOS code invoke some JS codes in your html by using

NSString* returnValue = [self.webView stringByEvaluatingJavaScriptFromString: "someJSFunction()"];

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