Implement JS function in IOS

Question

I have certain validation functions in a javascript file. I want to use them in my IOS app.

NSString *path = [[NSBundle mainBundle] pathForResource:@"validate" ofType:@"js"];

NSError* error;

NSString* validate = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&error];

I have a function keyDetails() in validate.js

How do i create an instance of that function and call it.

Why would you want to run a JavaScript function? What are you trying to accomplish? — woz
– woz, Commented Nov 11, 2013 at 13:56
Im doing an app of a website which has a huge number of validations. Im trying to use the same javascript for validation here. — Shob-Z
– Shob-Z, Commented Nov 11, 2013 at 14:00
I would think it would be easier to do an HTML5 app wrapped in a UIWebView then. — woz
– woz, Commented Nov 11, 2013 at 14:05
yeah.. Tats a better idea.. But i need to learn about this.. — Shob-Z
– Shob-Z, Commented Nov 11, 2013 at 14:08

woz · Accepted Answer · 2013-11-11 14:40:27Z

1

This is how you would do it:

NSString *path = [[NSBundle mainBundle] pathForResource:@"validate" ofType:@"js"];
[webView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:path]]];
NSString *result = [webView stringByEvaluatingJavaScriptFromString:@"keyDetails()"];

The documentation for stringByEvaluatingJavaScriptFromString is here.

edited Nov 11, 2013 at 14:40

answered Nov 11, 2013 at 14:18

woz

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1 Comment

Shob-Z Over a year ago

how do i call a function in that jsvascript file??

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