Question

well i got this code:

NSLog(@"button pressed");
    NSString* myurl=@"http://chart.apis.google.com/chart?chf=bg,s,67676700&chs=300x225&cht=p&chd=s:Uf9a&chdl=30°|40°|50°|60°";
    NSString *theurl=[myurl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSMutableURLRequest *theRequest=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:theurl] cachePolicy:NSURLRequestUseProtocolCachePolicy
                                                        timeoutInterval:60.0];                                              

    NSURLResponse* response;
    NSError* error;
    NSData *imageData=[NSURLConnection sendSynchronousRequest:theRequest returningResponse:&response error:&error];
    NSLog(@"%@",error); 
    NSLog(@"%@",response);
    NSLog(@"%@",imageData); 

    UIImage *myimage = [[UIImage alloc] initWithData:imageData];

    graphimage.image=myimage;   

Nothing realy special there…
but when i request the url: http://chart.apis.google.com/chart?chf=bg,s,67676700&chs=300×225&cht=p&chd=s:Uf9a&chdl=30°|40°|50°|60°

it requests with degrees like 30/40/50 … but i want values and not degreses in there which i get from the database.., how can i do it?

Answer 1

You will need to just get the degrees from a database and store them in a collection. Then you will be able to loop over the collection and add them to the string.

//Get Degrees from database, store them in an array of NSNumbers
...
//Pretend these are from a db
NSArray *degreesFromDatabase = [NSArray arrayWithObjects:
                                    [NSNumber numberWithInt:35],
                                    [NSNumber numberWithInt:50],
                                    [NSNumber numberWithInt:25],
                                    [NSNumber numberWithInt:72],
                                    nil];
    //URL with all static content
    NSMutableString *myurl = [NSMutableString stringWithString:@"http://chart.apis.google.com/chart?chf=bg,s,67676700&chs=300x225&cht=p&chd=s:Uf9a&chdl="];

    int count = [degreesFromDatabase count];

    for(NSUInteger i = 0; i < count; ++i)
    {
        NSNumber *degree = [degreesFromDatabase objectAtIndex:i];
        [myurl appendFormat:@"%@%%C2%%B0", degree];
        if(i < count - 1)
            [myurl appendString:@"|"];
    }