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POHow to pass variable from UIViewController to delegate UITableViewController
 

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  1. POHow to pass variable from UIViewController to delegate UITableViewController
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    <p>I'm relatively new to iOS programming, so bear with me here. The requirement I'm working with is as follows:</p> <blockquote> <p><strong>Screen 1:</strong> User is shown a UITableView loaded with data, specifically City and State. The user taps on a selection and is taken to Screen 2.</p> <p><strong>Screen 2:</strong> The user is shown a "detailed" view of the item they selected for editing.</p> <ul> <li>The City string (<strong><em>selectedCity</em></strong>) is placed in a Text Box for editing</li> <li>An NSArray of States is loaded in a UITableView. The state for the selected City should be selected in the table on load based on the string passed from Screen 1 (<strong><em>selectedState</em></strong>). The user can select a different State here if desired.</li> <li>A 2nd UITableView will contain an array of Schools related to the city and retrieved from the database. There is a separate set of functionality for managing this list.</li> </ul> </blockquote> <p>I have not had any issues implementing Screen 1. Here's how I passed the city and state values through to screen 2:</p> <pre><code>- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { //Get the City self.checkedCellIndex = indexPath.row; FSCity *selectedCity = [CityList objectAtIndex:indexPath.row]; NSString *cityName = selectedCity.name; NSString *stateName = selectedCity.state; AdminCityView *dvController = [[AdminCityView alloc] initWithNibName:@"AdminCityView" bundle:[NSBundle mainBundle]]; dvController.selectedCity = cityName; dvController.selectedState = stateName; [self.navigationController pushViewController:dvController animated:YES]; dvController = nil; } </code></pre> <p>In order to build Screen 2, however, I had to create UITableViewControllers for each UITableView (StateTable and SchoolTable) and load them in to the main UIViewController (AdminCityView), like so:</p> <pre><code>- (void)viewDidLoad { [super viewDidLoad]; txtCity.text = selectedCity; if (stateController == nil) { stateController = [[StateTable alloc] init]; } if (schoolController == nil) { schoolController = [[SchoolTable alloc] init]; } [tblState setDataSource:stateController]; [tblSchool setDataSource:schoolController]; [tblState setDelegate:stateController]; [tblSchool setDelegate:schoolController]; stateController.view = stateController.tableView; schoolController.view = schoolController.tableView; } </code></pre> <p>While I can get at the selectedState variable just fine in my UIViewController and my State table loads just fine in the UIView, I'm stuck at how to pass the selectedState variable from my UIViewController (AdminCityView) to the UITableViewController (StateTable) so that I can perform operations on StateTable with the variable (such as selecting the row that matches the variable).</p> <p>I've been testing with NSLog on both AdminCityView and StateTable, and the variable is definitely only accessible from AdminCityView currently. I'm not sure if I need to pass it via code in AdminCityView, or if I should just go back to Screen 1 and somehow pass it to StateTable prior to navigating to AdminCityView.</p> <p>I'm happy to post any additional code that might be helpful toward reaching an answer. Thanks!</p>
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    1. USRamy Al Zuhouri
    1. USuser1933062
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    1. COWhy are you working with two table views. I would use one table view with a header and two sections for the different selections.
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    2. COFor user experience purposes. On View (screen) 1, the user will select the City they want to edit. Screen 2 will allow them to edit that City's name, the State it belongs to, and add/edit/view the list of Schools within that City. There are several other data structures within the app that are similar, so once I get this "model" working, I want to repeat it for handling those other sets of data (again, for a consistent UX).
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    3. COWhy can't you use a global string variable for selectedState. Then no need of passing value. You can directly access that variable from UITableViewController..
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      1. USAnusha Kottiyal
 

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