6

在我的应用程序中，当我没有过滤我的表格时，当我点击一个单元格时，它的框架高度会增加以显示一个UIProgressView显示下载进度的。

但是，当我使用 a 过滤获取的结果控制器数据时UISearchDisplayController，此过滤后的表格视图中的单元格的行为方式不同。

相反，单元格不会调整大小，不会显示进度视图，不会触发下载，并且应用程序随后会崩溃。

如何控制使用过滤结果时显示的表格视图UISearchDisplayController？

编辑

这是我的-tableView:didSelectRowAtIndexPath:方法。它有点长，但要点是当我不搜索时它可以正常工作。

我认为我需要以某种方式对此进行调整，以便它可以与搜索结果控制器抛出的任何表视图/获取的结果控制器一起使用。

- (void) tableView:(UITableView *)tv didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    [tv deselectRowAtIndexPath:indexPath animated:YES];

    if ([self.searchBar isFirstResponder])
        [self.searchBar resignFirstResponder];

    MyObject *_myObject = (MyObject *)[self.fetchedResultsController objectAtIndexPath:indexPath];

    if (self.isSimulatingFileHierarchy) 
    {   
        if ([_myObject isFolder]) 
        {
            ObjectsViewController *_objectsViewController = [[ObjectsViewController alloc] initWithNibName:@"ObjectsViewController" bundle:nil];
            _objectsViewController.managedObjectContext = self.managedObjectContext;
            _objectsViewController.nodeID = self.nodeID;
            _objectsViewController.nodeName = self.nodeName;
            _objectsViewController.parentObjectKey = [_myObject cleanedKey];

            if (self.parentObjectKey)
                _objectsViewController.title = [[_myObject cleanedKey] stringByTrimmingPrefix:[self.parentObjectKey stringByAppendingString:@"/"]];
            else 
                _objectsViewController.title = [_myObject cleanedKey];

            [self.navigationController pushViewController:_objectsViewController animated:YES];
            UIBarButtonItem *_backButton = [[UIBarButtonItem alloc] initWithTitle:self.title style:UIBarButtonItemStyleDone target:nil action:nil];
            self.navigationItem.backBarButtonItem = _backButton;
            [_backButton release];
            [_objectsViewController release];
        }
        else {
            //
            // If we don't have data cached for this object, we add a request for the object's bytes to the objectRequestQueue
            // 
            // 1. We add a progress indicator to the object's cell (we have an indexPath)
            // 2. We store the data to the Documents folder
            //
            // Once we have the data, we push a ViewerViewController subclass that is specific to the object content type 
            //

            if ((!_myObject.isDownloading) && ([_myObject.localPath length] == 0)) 
            {
                if ([AwsObject objectContentSupportedForType:[_myObject.contentType intValue]]) 
                {
                    //
                    // Start request and redraw row with UIProgressView
                    //
                    [self triggerObjectRequestAdditionForObject:_myObject atIndexPath:indexPath];
                }
                else {
                    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(@"ObjectsViewObjectRequestUnsupportedTypeAlertViewTitle", @"") message:NSLocalizedString(@"ObjectsViewObjectRequestUnsupportedTypeAlertViewMessage", @"") delegate:self cancelButtonTitle:nil otherButtonTitles:NSLocalizedString(@"ObjectsViewObjectRequestUnsupportedTypeAlertViewContinue", @""), nil];
                    [alert show];
                    [alert release];
                }
            }
            else if ((_myObject.isDownloading) && ([_myObject.localPath length] == 0)) 
            {
                //
                // Cancel request and redraw row without progress view
                //
                [self triggerObjectRequestRemovalForObject:_myObject atIndexPath:indexPath];
            }
            else if ((!_myObject.isDownloading) && ([_myObject.localPath length] != 0)) 
            {
                //
                // Launch viewer for supported MIME type
                //
                switch ([_myObject.contentType intValue]) {
                    case kObjectContentTypeApplicationMsword: {
                        [self pushWebViewerViewController:_myObject withTextEncoding:@"UTF-8"];
                        break;
                    }
                    // handle other MIME types here...
                }
            }
            else {
                if ([_myObject isFolder]) { }
                else {
                    if ((!_myObject.isDownloading) && ([_myObject.localPath length] == 0))
                        [self triggerObjectRequestAdditionForObject:_myObject atIndexPath:indexPath];
                    else if ((_myObject.isDownloading) && ([_myObject.localPath length] == 0))
                        [self triggerObjectRequestRemovalForObject:_myObject atIndexPath:indexPath];
                    else if ((!_myObject.isDownloading) && ([_myObject.localPath length] != 0)) {
                        switch ([_myObject.contentType intValue]) {
                            case kObjectContentTypeApplicationMsword: {
                                [self pushWebViewerViewController:_myObject withTextEncoding:@"UTF-8"];
                                break;
                            }
                            // handle other MIME types here...
                        }
                    }
                }
            }
        }
    }
}
4

2 回答 2

12

在任何表视图委托方法中，您可以使用以下检查来检测您是否正在使用 UISearchDisplayController 的表视图：

if (tableView == self.searchDisplayController.searchResultsTableView) {
  // behavior specific to search display controller table view
}
else {
  // behavior specific to the original, unfiltered table view
}
于 2010-01-08T07:11:31.607 回答
0

通常，您会检查传递给的表视图tableView:didSelectRowAtIndexPath:是否等于搜索显示控制器的“searchResultsTableView”，并为这种情况编写替代行为。

听起来您的问题可能更复杂。你可以发布代码tableView:didSelectRowAtIndexPath:吗？

于 2009-12-21T10:07:35.300 回答