如何读取plist文件然后填充UItableView？

Question

I have been trying read data from a plist file. this is how it is structured

|term|detail(string)|

my properties :

@property (nonatomic, strong) NSArray *terms;
@property (nonatomic, strong) NSArray *termKeys;//this is just a array to keep track
@property (nonatomic, strong) NSString *detail;

this is how I access the detail in the cellForRowAtIndexPath

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell *cell = [[UITableViewCell alloc]
                             initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cell"];

    NSString *currentTermsName = [termKeys objectAtIndex :[indexPath row]];
                                  [[cell textLabel] setText:currentTermsName];
    cell.accessoryType = UITableViewCellAccessoryDetailDisclosureButton;


    detail = [terms objectAtIndex:indexPath.row]; 

    NSLog(@" bombs %@",terms[@"Bomb Threats"]);
    return cell;

}

and in view didload I have

- (void)viewDidLoad
    {
        [super viewDidLoad];


        NSString *myfile = [[NSBundle mainBundle]
                            pathForResource:@"terms" ofType:@"plist"];
        terms = [[NSDictionary alloc] initWithContentsOfFile:myfile];
        termKeys = [terms allKeys];
    }

It accesses the values , but it store the same one for each object lets say I have 5 different records in plist, if i print detail it displays the same record 5 times.

Once detail is set then I pass it to detialView

- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
    if([segue.identifier isEqualToString:@"detailsegue"]){
        TermsDetailViewController *controller = (TermsDetailViewController *)segue.destinationViewController;
        controller.detailTerm = detail;
    }
}

and finaly :

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [self performSegueWithIdentifier:@"detailsegue" sender:self];
}

Here is my dictionary : http://pastebin.com/bxAjJzHp

The goal is to pass the detail information to a detailviewcontroller just like a Master/detail sample project.

Answer 1

You cannot set the detail variable in the cellForRowAtIndexPath: method, because this way the value becomes transient: it depends on how the user scrolls through the table, not on what disclosure button the user clicks.

Move this line

detail = [terms objectAtIndex:indexPath.row];

to the didSelectRowAtIndexPath: before the call of performSegueWithIdentifier: to fix the problem. Now the detail is set in response to user's click immediately before the prepareForSegue: call, making sure that the correct value is passed to the view controller with the details data.