Xcode6 UIWebView and JavaScript interaction (issue fix), xcode6uiwebview

Xcode6 UIWebView and JavaScript interaction (issue fix), xcode6uiwebview

This article describes the interaction between UIWebView and JavaScript. In UIWebView, JavaScript request processing is intercepted. From the app perspective, this is a JavaScript Hook request.

In App versions earlier than Xcode6, JavaScript can send Hook requests as follows:

HTML:

<li><a href="testapp://function=test&callbackJS=testCallback">test link</a></li>

JavaScript:

<script language="JavaScript" type="text/javascript">  function xcode6(){var url = apptest://function=test&callbackJS=testCallback;location.href = url;  }</script><li><a href="Javascript:xcode6();">Xcode6 Javascript</a></li>

In the Xcode6 App, it is found that the href method changed through JavaScript is unavailable. From the app perspective, (BOOL) webView :( UIWebView *) webView shouldStartLoadWithRequest :( NSURLRequest *) request navigationType :( UIWebViewNavigationType) navigationType is not called.

Solve this problem through escape URL:

<script language="JavaScript" type="text/javascript">  function xcode6(){var url = 'apptest://'+escape('function=test&callbackJS=testCallback');location.href = url;  }</script><li><a href="Javascript:xcode6();">Xcode6 Javascript</a></li>

For ios UIWebView, how does javascript call system services?

The most common interaction method in ios is to implement webview through URL Scheme. shouldStartLoadWithRequest :( NSURLRequest *) request navigationType :( UIWebViewNavigationType) navigationType can be used to process various URL Scheme. For example:-(BOOL) webView :( UIWebView *) webView shouldStartLoadWithRequest :( NSURLRequest *) request navigationType :( UIWebViewNavigationType) navigationType {
NSLog (@ "shouldStartLoadWithRequest called ");
NSURL * url = [request URL];
If (! [[Url scheme] isw.tostring: CUSTOM_PROTOCOL_SCHEME]) {
Return YES;} NSString * actionType = [url host];
If ([actionType ispolictostring: @ "alert"]) {
NSLog (@ "alert called ");
NSString * JSONString = [
[[Url fragment] stringByReplacingOccurrencesOfString: @ "+" withString: @ ""] stringByReplacingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
[[IToast makeText: NSLocalizedString (JSONString, @ "")] show];} return NO;} in this way, you can: var url = schema + ": // alert "+" # "+ encodeURIComponent (msg );
Document. location = url; call object c to update in the opposite direction:

UIWebView has one problem.

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