Why is detailTextLabel not visible?

问题

detailTextLabel is not visible (code below). Can you tell me why?

 // Customize the appearance of table view cells.
 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

static NSString *CellIdentifier = @"Cell";

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}

// Configure the cell...

NSString *cellValue = [myListArray objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;

cell.detailTextLabel.text = @"Hello "; // This is not visible
cell.image = [myListArrayImages objectAtIndex:indexPath.row];

return cell;
}

回答1:

The detailTextLabel is not displayed for cells with the UITableViewCellStyleDefault style. init the UITableViewCell with UITableViewCellStyleSubtitle instead and you should see your detailTextLabel.

cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];

回答2:

Or if you are using Interface Builder, change the Style cell property to Subtitle. :)

回答3:

In order to solve it programmatically:

let cell = UITableViewCell(style: .subtitle, reuseIdentifier: "identifier")

回答4:

I just want to mention that the wording in the UITableViewCell class reference can be a little bit confusing on this issue:

(After describing each cell type)

"Discussion In all these cell styles, the larger of the text labels is accessed via the textLabel property and the smaller via the detailTextLabel property."

It might seem that it's saying all of the cell types include a detailTextLabel, but if you carefully read through them it's only the default type that does not have a detailTextLabel.

回答5:

I have used this and it worked for me:

// programming mark ----- ----- ---- ----- ----- ---- ----- ----- ----

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let CellIdentifier: String = "CellIdentifier"

    var cell = tableView.dequeueReusableCellWithIdentifier(CellIdentifier) as? UITableViewCell

    if cell == nil {
        cell = UITableViewCell(style: UITableViewCellStyle.Value1, reuseIdentifier: CellIdentifier)
    }

    cell!.textLabel!.text = "Title"
    cell!.detailTextLabel!.text = "Value"

    return cell!
}

来源：https://stackoverflow.com/questions/5190648/why-is-detailtextlabel-not-visible

标签

objective-c

uitableview

cell

detailtextlabel