Phonegap Cordova call javascript functions from Objective-C

Question

I am facing some Objective-C lackiness of knowledge in my PhoneGap App.

I have a library that I need to implement in Objective-C. This Library has some callbacks that I receive in a delegate Class ( called CCController ) :

[MyLib sharedInstance].delegate = self;

This Class is instanciated in the AppDelegate.m like this :

CCController *myClass = [CCController alloc];
[myClass init];

Then, when my Lib sends events, the functions in my CCController are called. I need, at this point, to call my Javascript functions with a parameter.

How can I implement this ?

I have tried calling a function in AppDelegate.m which contains this :

NSString* jsString = [NSString stringWithFormat:@"myJSFunction(\"%@\");", stringParameter];
[self.viewController.webView stringByEvaluatingJavaScriptFromString:jsString];

But without success, nothing is called in my JS...

How can I implement this ? Thanks for help :)

jcesarmobile · Accepted Answer · 2013-07-19 14:35:48Z

7

You have to create a plugin and put the native code there instead using it in the AppDelegate.m.

From the plugin class you can do this:

NSString* jsString = [NSString stringWithFormat:@"myJSFunction(\"%@\");", stringParameter];
[self.webView stringByEvaluatingJavaScriptFromString:jsString];

Plugin development guide

answered Jul 19, 2013 at 14:35

jcesarmobile

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6 Comments

arlg Over a year ago

Thanks, I didn't know this and it is not mentionned in the documentation. Now I want to know what is the best way to call functions in my Plugin Class from my CCController ?

jcesarmobile Over a year ago

I don't understand the question, js functions? Or native functions

arlg Over a year ago

The native code in my CCController class have to call natives functions in my Plugin class, so that I have access to the webView to call my javascript functions then.

jcesarmobile Over a year ago

If you tell me the library you are using I can take a look, but you can just use [self.webView stringByEvaluatingJavaScriptFromString:jsString]; whenever you want to call a js funcion

arlg Over a year ago

I want to call a function into the plugin from another Objective-C class. How can I do this (thanks for help)

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