Question

我有一个NSTableView连接到我的CountViewController.h

@property (nonatomic, weak) IBOutlet NSTableView * tableCountData;

在-(void)viewDidAppear下我有代码删除除第一列以外的所有列，并使用新列重新创建。

-(void)viewDidAppear
{
    NSArray *tableColumns = [self.tableCountData tableColumns];
    BWProject *project = ((Document *)self.view.window.windowController.document).project;

    for (NSTableColumn *col in tableColumns) {
        if ([col.identifier isEqualToString:@"columnGenes"]) continue;
        [self.tableCountData removeTableColumn:col];
    }

    for (NSString *sample in project.samples) {
        NSTableColumn *col = [[NSTableColumn alloc] init];
        col.identifier = sample;
        col.headerCell.stringValue = sample;
        [self.tableCountData addTableColumn:col];
    }

    [self.tableCountData reloadData];
}

但是，当我按如下方式填充表时：

- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
    BWProject *project = ((Document *)self.view.window.windowController.document).project;
    NSTableCellView *cellView = [tableView makeViewWithIdentifier:tableColumn.identifier owner:self];

    if (cellView == nil) {
        CGRect myRect = CGRectMake(0,0,tableColumn.width,0);
        cellView = [[NSTableCellView alloc] initWithFrame:myRect];
        [cellView addSubview:[[NSTextField alloc] initWithFrame:cellView.frame]];
    }

    if ([tableColumn.identifier isEqualToString:@"columnGenes"]) {
        cellView.textField.stringValue = [[project.geneset allKeys] objectAtIndex:row];
    } else {
        for (NSString *sample in project.samples) {
            if ([tableColumn.identifier isEqualToString:sample]) {
                BWGene *gene = [project.geneset objectForKey:[[project.geneset allKeys] objectAtIndex:row]];
                BWGeneReads *geneReads = [gene.samples objectForKey:sample];
                cellView.textField.stringValue = [NSString stringWithFormat:@"%f", geneReads.reads];
            }
        }
    }

    return cellView;
}

我得到空数据列。我已尝试将[cellView addSubview:[[NSTextField alloc] initWithFrame:cellView.frame]]替换为[cellView setTextField:[[NSTextField alloc] initWithFrame:cellView.frame]]，但这会导致应用程序因EXEC_BAD_ACCESS而崩溃。以下是一个示例屏幕截图：

我做错了什么？我无法在文档中找到任何线索，但我觉得这是一个简单的解决方案，因为许多应用都使用动态列...

Answer 1

不要在基于视图的表视图中执行setDataCell:。

如果您在NSTableCellView中创建新的viewForTableColumn，则会添加NSTextField子视图。您必须将单元格视图的textField设置为此文本字段。

- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row
{
    BWProject *project = ((Document *)self.view.window.windowController.document).project;
    NSTableCellView *cellView = [tableView makeViewWithIdentifier:tableColumn.identifier owner:self];

    if (cellView == nil) {
        CGRect myRect = CGRectMake(0,0,tableColumn.width,0);
        cellView = [[NSTableCellView alloc] initWithFrame:myRect];
        NSTextField *myTextField = [[NSTextField alloc] initWithFrame:cellView.frame];
        cellView.textField = myTextField; // this assignment was missing
        [cellView addSubview:myTextField];
    }

    if ([tableColumn.identifier isEqualToString:@"columnGenes"]) {
        cellView.textField.stringValue = [[project.geneset allKeys] objectAtIndex:row];
    } else {
        for (NSString *sample in project.samples) {
            if ([tableColumn.identifier isEqualToString:sample]) {
                BWGene *gene = [project.geneset objectForKey:[[project.geneset allKeys] objectAtIndex:row]];
                BWGeneReads *geneReads = [gene.samples objectForKey:sample];
                cellView.textField.stringValue = [NSString stringWithFormat:@"%f", geneReads.reads];
            }
        }
    }

    return cellView;
}

NSTableView中动态创建的列为空

1 个答案: