[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'

[Promethia]

i used the identify demo project to create my application. When i click out of extent of the dinamicLayer, application crashed with this error;

2012-04-15 12:42:45.037 iSIT[1427:11f03] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'

i tried to use alert view when click out of extent, but don't works.

Please Help me

[nrjarecha]

Just change your didExecuteWithIdentifyResults code as following and it won't crash...

- (void)identifyTask:(AGSIdentifyTask *)identifyTask operation:(NSOperation *)op didExecuteWithIdentifyResults:(NSArray *)results {
    
    //clear previous results
    [self.graphicsLayer removeAllGraphics];
    
    if ([results count] > 0) {
                
        //add new results
        AGSSymbol* symbol = [AGSSimpleFillSymbol simpleFillSymbol];
        symbol.color = [UIColor colorWithRed:0 green:0 blue:1 alpha:0.5];
        
        // for each result, set the symbol and add it to the graphics layer
        for (AGSIdentifyResult* result in results) {
            result.feature.symbol = symbol;
            [self.graphicsLayer addGraphic:result.feature];
        }
        
        //set the callout content for the first result
        //get the state name
        NSString *stateName = [((AGSIdentifyResult*)[results objectAtIndex:0]).feature.attributes objectForKey:@"STATE_NAME"]; 
        self.mapView.callout.title = stateName;
        self.mapView.callout.detail = @"Click for more detail..";
        
        //show callout
        [self.mapView showCalloutAtPoint:self.mappoint forGraphic:((AGSIdentifyResult*)[results objectAtIndex:0]).feature animated:YES];
    }
    else {
        
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Identify Result"
                                                        message:@"No Result Found!"
                                                       delegate:nil
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
        [alert show];
        [alert release];
    }
    
    //call dataChanged on the graphics layer to redraw the graphics
    [self.graphicsLayer dataChanged];	
}

Regards,
Nimesh

[Promethia]

Just change your didExecuteWithIdentifyResults code as following and it won't crash...

- (void)identifyTask:(AGSIdentifyTask *)identifyTask operation:(NSOperation *)op didExecuteWithIdentifyResults:(NSArray *)results {
    
    //clear previous results
    [self.graphicsLayer removeAllGraphics];
    
    if ([results count] > 0) {
                
        //add new results
        AGSSymbol* symbol = [AGSSimpleFillSymbol simpleFillSymbol];
        symbol.color = [UIColor colorWithRed:0 green:0 blue:1 alpha:0.5];
        
        // for each result, set the symbol and add it to the graphics layer
        for (AGSIdentifyResult* result in results) {
            result.feature.symbol = symbol;
            [self.graphicsLayer addGraphic:result.feature];
        }
        
        //set the callout content for the first result
        //get the state name
        NSString *stateName = [((AGSIdentifyResult*)[results objectAtIndex:0]).feature.attributes objectForKey:@"STATE_NAME"]; 
        self.mapView.callout.title = stateName;
        self.mapView.callout.detail = @"Click for more detail..";
        
        //show callout
        [self.mapView showCalloutAtPoint:self.mappoint forGraphic:((AGSIdentifyResult*)[results objectAtIndex:0]).feature animated:YES];
    }
    else {
        
        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Identify Result"
                                                        message:@"No Result Found!"
                                                       delegate:nil
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
        [alert show];
        [alert release];
    }
    
    //call dataChanged on the graphics layer to redraw the graphics
    [self.graphicsLayer dataChanged];	
}

Regards,
Nimesh

I love you
Thanks

[nrjarecha]

You're welcome!

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Thank you,
Nimesh