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POToggle Boolean on UITableView Selected Row
 

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  1. POToggle Boolean on UITableView Selected Row
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    <p>I'm trying to toggle a Boolean value when a table row is selected. This code was working when my table rows contained NSObjects (in a different class)...I simplified my code so that the rows only contain strings and not objects (cut out the class), but now the boolean won't toggle because my instance variable is a string. Here's the original working code:</p> <p>Declared in XYZObject:</p> <pre><code>@property BOOL checked; </code></pre> <p>Table view didSelectRowAtIndexPath:</p> <pre><code>XYZObject *tappedItem = [myArray objectAtIndex:indexPath.row]; tappedItem.checked = !tappedItem.checked; NSString *addedItem = cell.textLabel.text; if(!tappedItem.checked) { [newArray removeObject:addedItem]; } else { [newArray addObject:addedItem]; } </code></pre> <p>When I change XYZObject to NSString and move the Bool property to the table view, I get the "Property 'checked' not found on object of type 'NSString *'. Changing NSString to NSObject does the same thing. If I change NSString to XYZMyTableViewController, it will now compile but then breaks at runtime due to "unrecognized selector sent to instance".</p> <p>So my question would be, can I toggle the 'checked' Bool value on an array of strings?</p> <p><strong>UPDATE/SOLUTION</strong></p> <p>I was able to solve the problem by eliminating the Bool entirely and just using:</p> <pre><code>if (cell.accessoryType == UITableViewCellAccessoryNone) { cell.accessoryType = UITableViewCellAccessoryCheckmark; [newArray addObject:addedItem]; } else { cell.accessoryType = UITableViewCellAccessoryNone; [newArray removeObject:addedItem]; } </code></pre> <p>I'm not particularly happy as I had some other methods using 'checked', but I should be able to just rewrite them in the same way. I'd still like to know why I wasn't able to toggle a bool value on a string that's in my table cell.</p>
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    1. PTQuestion
    1. USPaul
    1. USPaul
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    1. COYou moved the boolean instance variable to the tableview? If that's the case, that's the reason the property is not being found-you are asking to change a property or instance variable that doesn't exist(for the NSString object). You would need to set it like myTableView.checked = !myTableView.checked
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      1. POToggle Boolean on UITableView Selected Row
      1. USjeremyw
    2. COYeah, since I completely ditched XYZObject I moved the BOOL checked from that into my table view. I'm a bit confused on changing a variable that doesn't exist, I'm still declaring *tappedItem as an NSString (I've also tried declaring it in the interface as well). What do you mean when you say that variable doesn't exist?
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      1. POToggle Boolean on UITableView Selected Row
      1. USPaul
    3. COI simply changed XYZObject to XYZTableViewController, now everything compiles but hits a breakpoint when tappedItem.checked is called for "NSCFString checked: unrecognized selector sent to instance"
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      1. POToggle Boolean on UITableView Selected Row
      1. USPaul
 

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