calling javascript method from UIWebView

Question

[self.webview stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"myfunc('%@')",string]];

This above code works very well and absolutely no problem but only when my javascript method is present in the page which i am loading. But if the js method is referred in any external js file it is not being triggered and this is how i am loading my page

       [self.webview loadRequest:[[NSURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://example/mypage.html"]]];

Thanks in advance

Did you ensure that your external js file was parsed? The method must be known to WebView at time of calling. — Matthias
– Matthias, Commented Mar 1, 2013 at 8:12
the method is globally defined in js file and the js file is referred in the html file as <script type="text/javascript" src="webview-script.js"></script> — Lochana Ragupathy
– Lochana Ragupathy, Commented Mar 1, 2013 at 9:44

user660808 · Accepted Answer · 2013-05-09 16:11:07Z

1

To be sure that your javascript function will be called only after the page is completely loaded, you have to call it inside the webViewDidFinishLoad: implementation.

So, for example:

- (void)webViewDidFinishLoad:(UIWebView *)webView {
    [webView stringByEvaluatingJavaScriptFromString:[NSString stringWithFormat:@"myfunc('%@')",string]];
    // Do any additional stuff
}

answered May 9, 2013 at 16:11

user660808

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