Hi vikrant327,could you post some code how you create the callouts with your feature layer? (I need that for my project too and maybe I could help you with that.)Some hints:Could you access a featureSet on you feature layer?If thats possible you could get the contents of the layer like this:
for(int i = 0; i < [featureSet.features count]; i++) {
AGSGraphic *feature = [inFeatureSet.features objectAtIndex:i];
String *content = [feature.attributes valueForKey:@"PUT HERE THE NAME OF THE CONTENT YOU WANT"];
}