iphone - passing objective c variable to javascript in ios

Question

How to pass a ObjectiveC string Variable to a javascript function? I have just started with javascript.. so plz 4give my ignorance...

Answer 1

NSString * param  = @"foo";   
NSString * jsCallBack = [NSString stringWithFormat:@"myFunc('%@')",param];
[webView stringByEvaluatingJavaScriptFromString:jsCallBack];