Question

I basically want to send a known string from a method I am in:

    NSString *websiteString;
    if(a==0)
          websiteString = [[[NSString alloc] initWithString:@"www.google.com"] autorelease];

    else
          websiteString = [[[NSString alloc] initWithString:@"www.yahoo.com"] autorelease];

    UIButton *aButton = [UIButton buttonWithType:UIButtonTypeCustom];
    aButton.frame = rct;

    // I get thrown in this next line: how do I initialize the Value for key?
    [aButton setValue:websiteString forKey:@"website"];
    [aButton addTarget:self action:@selector(clickedInsidePage:) forControlEvents:UIControlEventTouchUpInside];

To the callback function, where I can load the sent string in the UIWebview…

-(void) clickedInsidePage:(id) sender{

   NSString *websiteString = [[[NSString alloc] initWithString:[((UIControl *) sender) valueForKey:@"website"]] autorelease];
    NSURLRequest *requestObj = [NSURLRequest requestWithURL:[NSURL URLWithString:websiteString]];
    NSLog(@"visiting: %@",websiteString);
    .
    .
    .

    }

But I get an error thrown because the key/Value was not actually set or initialized.

Answer 1

You could have an array of strings, then give the button tag property the index. Then you can extract the tag to get the string:

NSArray * someArray = // website strings added here

In your if statement, set the button to match the index:

aButton.tag = 0;

Then use the index to get the string:

string = [someArray objectAtIndex: ((UIButton*)sender).tag];