UITableViewCell initWithStyle:UITableViewCellStyleSubtitle is not working

问题

I'm having an issue in trying to display info in a cell, one on the left and one on the right. I'm aware using initWithStyle with UITableViewCellStyleSubtitle. I use this but it doesn't seem to work.

Here is some sample code:

- (UITableViewCell *)tableView:(UITableView *)ltableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *CellIdentifier = @"Account Cell";
    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];

    if (cell == nil)  {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:Cellidentifier];
    }

    Accounts *account = [self.fetchedResultsController objectAtIndexPath];
    cell.textLabel.text = account.name;

    cell.detailTextLabel.text = @"Price";

    return cell;
}

I can display cell.textLabel.text just fine, however I cannot get the simple "Price" to be displayed. I've tried different things, such as setting the font size of cell.detailTextLabel.

I've also tried UITableViewCellStyleValue1 as some had suggested in older posts. Threw NSLog after setting to "Price", shows cell.detailTextLabel as null.

Not sure what I'm doing wrong.

Edit: I found this: cell.detailTextLabel.text is NULL

If I remove if (cell == nil) it works... That check should be in place, so how do you make it work when using the different styles?

回答1:

When using storyboards and prototype cells, a cell is always returned from the dequeue method (assuming a prototype with that identifier exists). This means you never get into the (cell == nil) block.

In your case the prototype cell is not defined in the storyboard with the subtitle style, so a subtitled cell is never used, and the detail text label does not exist. Change the prototype in the storyboard to have the subtitle style.

回答2:

Remove all your code just once you try these lines only and check this will work or not.

 -(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];
 }


   cell.textLabel.text=[Array objectAtIndex:indexPath.row];
   cell.detailTextLabel.text=@"Price";


   return cell;
 }

回答3:

I see the problem: in your method name, the UITableView variable is named ltableView, not tableView. Change it to tableView.

回答4:

cell.detailTextLable.text should be cell.detailTextLabel.text. It looks like a simple mis-spelling of label.

回答5:

All the answers mentioned here are really a workaround i.e. using storyboard. Here is a way to do it only in code.

Basically instead of registering the identifier for the cell in viewDidLoad do it only once in cellForRowAtIndexPath: method. Also reset cell registered in viewDidLoad __sCellRegistered = 0;

    static int _sCellRegistered = 0;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  UITableViewCell *cell = nil;


if (__sCellRegistered == 0) {
    __sCellRegistered = 1;
    NSLog(@"register cell");

    cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:@"CellIdentifier"];
    [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"CellIdentifier"];
};

if (!cell) {
    NSLog(@"dequeue");

    cell = [tableView dequeueReusableCellWithIdentifier:@"CellIdentifier" forIndexPath:indexPath];
}

来源：https://stackoverflow.com/questions/10485682/uitableviewcell-initwithstyleuitableviewcellstylesubtitle-is-not-working

标签

ios

uitableview