How to call a simple Objective-C function from Javascript

Question

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How to call an Objective-C method from Javascript in a Cocoa/WebKit app?

How to call a simple Objective- C function from Javascript. Say I have a function :

-(void) callFromJavascript {
// How to call this method of Objective -C from a Javascript function.

}

check this link u will get your answer http://blog.techno-barje.fr/post/2010/10/06/UIWebView-secrets-part3-How-to-properly-call-ObjectiveC-from-Javascript/ — SSP, Dec 27 '12 at 11:50
The answer I used was here: http://stackoverflow.com/a/2293305/105539 In my comments below it, I showed how to do it even easier. — Volomike, Dec 11 '15 at 06:11

score 0 · Answer 1 · answered Dec 27 '12 at 11:50

One mechanism is to intercept document.location changes (and cancel them) and call your method when the requested change to document.location matches a URL you predefined.

Then from JS you just change document.location to that predefined URL.

To intercept the changes override:

- (BOOL)webView:(UIWebView *)_webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType;

and return NO when request matches what you're setting in JS as document.location.

See Samarth Pandey's answer. It's a better approach. – sqreept Dec 27 '12 at 11:58 — sqreept, Dec 27 '12 at 11:58

How to call a simple Objective-C function from Javascript

1 Answers1