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Editorial Team
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Asked: 2026-06-17T09:35:04+00:00

I am new programmer to objective C. I added some html file to Objective

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I am new programmer to objective C. I added some html file to Objective C. In this html file contains simple javascript function. I need to call that Function through thw objective C code. I tried lot of time by using google. But I could not find real way to do it.
Bellow Contains html File :

<!DOCTYPE html>
<html>
    <head>
        <script>
            function myFunction()
            {
                alert("Hello World!");
            }
            </script>
    </head>

    <body>
        <button onclick="myFunction()">Try it</button>
    </body>
</html>

I called this function like this : Is it correct or wrong ?? If it wrong, how to do this. Please help. 

NSString *path;
NSBundle *thisBundle = [NSBundle mainBundle];
path = [thisBundle pathForResource:@"first" ofType:@"html"];
NSURL *instructionsURL = [NSURL fileURLWithPath:path];
[webView loadRequest:[NSURLRequest requestWithURL:instructionsURL]];

 NSString * jsCallBack = [NSString stringWithFormat:@"myFunction()"];
 [webView stringByEvaluatingJavaScriptFromString:jsCallBack];

[webView stringByEvaluatingJavaScriptFromString:@"myFunction()"];
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1 Answer

  1. Editorial Team
    NSString *path;
NSBundle *thisBundle = [NSBundle mainBundle];
path = [thisBundle pathForResource:@"first" ofType:@"html"];
NSURL *instructionsURL = [NSURL fileURLWithPath:path];
[webView loadRequest:[NSURLRequest requestWithURL:instructionsURL]];

 NSString * jsCallBack = [NSString stringWithFormat:@"myFunction()"];
 [webView stringByEvaluatingJavaScriptFromString:jsCallBack];

[webView stringByEvaluatingJavaScriptFromString:@"myFunction()"];

    If all this code called from single place, than it won’t work, because page load is asynchronous and page with JavaScript code is not ready at that moment.
    Try to call this methods [webView stringByEvaluatingJavaScriptFromString:@"myFunction()"]; in UIWebViewDelegate callback method –webViewDidFinishLoad:

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