NSArray和tableview

Question

I'm making a navigation-based application, where i have a file called DataService.m and my RootViewController

.m

in my DataService.m I'm calling

-(NSArray*)loadData
{
    AlarmItem *item1 = [[[AlarmItem alloc] initWithTitle:@"TEST2"] autorelease];
    AlarmItem *item2 = [[[AlarmItem alloc] initWithTitle:@"TEST3"] autorelease];
    AlarmItem *item3 = [[[AlarmItem alloc] initWithTitle:@"TEST4"] autorelease];
    AlarmItem *item4 = [[[AlarmItem alloc] initWithTitle:@"TEST5"] autorelease];
    AlarmItem *item5 = [[[AlarmItem alloc] initWithTitle:@"TEST6"] autorelease];

    NSMutableArray *items = [NSMutableArray arrayWithObjects:item1, item2, item3, item4, item5, NULL];

    return items;
}

and in my RootViewCoontroller.mi have

- (IBAction)RefreshAlarmList:(id)sender
{
    XMLDataService *myXML = [[XMLDataService alloc] init];
    [myXML loadData];
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIBarButtonItem *refreshButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh
    target:self action:@selector(RefreshAlarmList:)]; 
    self.navigationItem.rightBarButtonItem = refreshButton;
    [refreshButton release];
}

When I run my simulator the tableView is empty.. how can i display my items ?

Answer 1

加载到表视图中后不要autorelease该函数，然后自动释放它，然后您如何将数据显示到表视图中。作为在表视图中重新加载数据的操作。

Answer 2

You can try one thing.Here in the delegate method cellForRowAtIndexPath , in last u should return the cell.It may work.

• (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease]; } // Configure the cell. AlarmItem *item = [_items objectAtIndex:indexPath.row]; cell.textLabel.text = item.tagName;return cell;}

Answer 3

[myXML loadData]; 

This is returning an array, which presumably you wish to use as your table's data source, but you are doing nothing with it. You need to assign this to an array, which is a retained ivar in your view controller class, _items or items judging by your other comments:

self.items = [myXML loadData];