Question

Possible Duplicate:
how to convert nsstring to uicolor?

not an objective-c programmer but am not sure if I can’t do something like this. I know I’m returning a string value but just want a terse way of getting at these values:

NSMutableArray *colorsArray=[[NSMutableArray alloc] init];
[colorsArray addObject:@"whiteColor"];
[colorsArray addObject:@"blueColor"];
 // val5 is either 0 or 1
[view setBackgroundColor:[UIColor [colorsArray objectAtIndex:val5]]];

Is this possible?

thx in advance

Answer 1

Why don’t you store directly colors instead of NSString?

NSMutableArray *colorsArray=[[NSMutableArray alloc] init];
[colorsArray addObject:[UIColor whiteColor]];
[colorsArray addObject:[UIColor blueColor]];
if (val5 < colorsArray.count) // Doesn't hurt any to be safe, and this way you won't get a crash if something messes up your val5 at some point
{
    // val5 is either 0 or 1
    [view setBackgroundColor:[colorsArray objectAtIndex:val5]];
}
else
{
    NSLog(@"Error - Color not expected - leaving color the way it is.")
}

You code as it is doesn’t compile, syntax is invalid since you are trying to do [UIColor @"whiteColor"] which is not a valid syntax. You could use performSelector: but this is senseless unless you really need to store colors as strings.