Selecting Variable Dynamically

Question

Hello and thank you for your time. Im fairly new to IOS/Objective C.

I have multiple variables setup globally at the top of my viewcontroller.

NSMutableArray * A;
NSMutableArray * B;
NSMutableArray * C;

Now when someone selects a cell in a tableview I would like to use the name of that cell to select one of the global variables. I found something for doing this with viewcontrollers, but I need something for misc variables as well. I am reffering to:

id myNewController = [[NSClassFromString(selected) alloc] init];
[[self navigationController] pushViewController:myNewController animated:YES];

So it would be something like this:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
// Save text of the selected cell:
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
stringVariable = cell.textLabel.text;// value=A,B or C

// match string to array and load that array.
??         

}

Thanks in advance for any help, and sorry if this has been asked but I couldn't find anything that worked so as a last resort im asking for help :)

bendytree · Accepted Answer · 2013-05-29 16:17:15Z

1

You may be better off storing your arrays as keys on a dictionary, instead of as individual fields. For example:

NSDictionary* dictionary;

dictionary = @{
    @"A": [[NSMutableArray alloc] init],
    @"B": [[NSMutableArray alloc] init],
    @"C": [[NSMutableArray alloc] init]
};

Then when your row is selected, you could lookup the array by key:

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
NSString* key = cell.textLabel.text;// value=A,B or C

NSMutableArray* array = dictionary[key];
....

answered May 29, 2013 at 16:17

bendytree

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2 Comments

Anthem127 Over a year ago

Seems like a viable solution. Ive seen that before I just needed it simplified so I could grasp it. I'm going to try and impliment it and if it meets my expectations I will rate you up. Thanks for the help bendytree :)

Anthem127 Over a year ago

This led me down the right path, the only thing I needed to do was change the way I was initializing the dictionary. I needed to add existing arrays to the dictionary, and then pass them to the event handler like so dictionary= [NSDictionary dictionaryWithObject:A forKey:@"A"]; that did the trick fr me, thanks!

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