How to call Javascript method from UIViewController in native iOS app

Asked Apr 11 '16 at 03:27

Active Apr 11 '16 at 03:32

Viewed 275 times

I'm making a simple call to my Javascript function and sending a variable/string in the same. But the same function is not getting called in javascript.

NSString *jsCallBack = [NSString stringWithFormat:@"setLegend('%@')",result];
[webview stringByEvaluatingJavaScriptFromString:jsCallBack];

In Javascript

function setLegend(lStr)
{
}

Please let me know what's wrong?

edited Apr 11 '16 at 03:32

rmaddy

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asked Apr 11 '16 at 03:27

gurmandeep

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Has the web view been added to view hierarchy? – rmaddy Apr 11 '16 at 03:32
Yes it is in the view hierarchy – gurmandeep Apr 11 '16 at 04:00
Check this link [How to invoke Objective C method from Javascript and send back data to Javascript in iOS?](http://stackoverflow.com/questions/9826792/how-to-invoke-objective-c-method-from-javascript-and-send-back-data-to-javascrip). hope this will help you. – testing tcyonline Apr 11 '16 at 04:17
check your web view delegates for error. – Kunal Balani Apr 11 '16 at 04:20
where u are calling this .. do it in webViewDidFinishLoad – Anshad Rasheed Apr 11 '16 at 04:25
I'm using it in webViewDidFinishLoad only. – gurmandeep Apr 11 '16 at 04:36
NSString *legendStr = [NSString stringWithFormat:@"sendLegend()"]; [webview stringByEvaluatingJavaScriptFromString:legendStr]; – gurmandeep Apr 11 '16 at 04:40

How to call Javascript method from UIViewController in native iOS app

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