iOS UIWebView Javascript - insert data -receive callbacks?

Question

I have a webpage. I have a javascript file that does a whole lot of stuff. In the app I have an NSString with some crucial data that needs to be processed in the javascrip

Answer 1

Hi we can send the data from objective c to javascript and can callback from javascript easily

Objective-C --> javaScript

In Objective-C class

NSData *locationCountData = [NSJSONSerialization dataWithJSONObject:locationCount   options:NSJSONWritingPrettyPrinted error:nil];
NSString *locationCountString = [[NSString alloc] initWithData:locationCountData encoding:NSUTF8StringEncoding];

NSData *locationCountData = [NSJSONSerialization dataWithJSONObject:locationCount options:NSJSONWritingPrettyPrinted error:nil];
NSString *locationCountString = [[NSString alloc] initWithData:locationCountData encoding:NSUTF8StringEncoding];

NSString *str = [NSString   stringWithFormat:@"testFunction(%@,%@)",locationCountString, locationsListString];
[self.myWebView stringByEvaluatingJavaScriptFromString: str];

in JavaScript file