CODEWITHSUNDEEP
iphoneuitableviewios4uipickerview
Jim
Jim

Reputation: 2300

UITableView and UIPickerView interaction issues

I have a UITableView consisting of three rows - each row is a data field in a settings screen. When the user clicks a row, I have a UIPickerView appear for them to select a value. I am using the UITableViewCellStyleValue1 - the left side is the name of the data field, and the right side (detailTextLabel) should be the value selected from the picker.

I created a targetCell ivar to hold the selected cell. In my picker, I use the below code in the didSelectRow method:

    self.targetCell.detailTextLabel.text = @"TEST";

Which works, however I have several presentational issues. The first was that the detailTextLabel text was white (although API says it should be blue??!?) I fixed this with:

    self.targetCell.detailTextLabel.textColor = [UIColor blackColor];

However, the text does not appear in the cell until I click the cell or another cell. So I tried adding a [self.tableView reloadData]; Which does the trick of refreshing the cell and getting the label text to appear, but also removes the blue highlighting which I want to maintain.

If you could look over this code and let me know the easiest way to get the below results when selecting a value on the picker:

Thanks!

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component { 
    // Handle the selection 
    self.targetCell.detailTextLabel.textColor = [UIColor blackColor];
    self.targetCell.detailTextLabel.text = @"TEST";
    [self.tableView reloadData];
}

Edited to add final code soluton:

Thanks to chown for the answer - my final working code is:

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component { 
    // Handle the selection 
    self.targetCell.detailTextLabel.textColor = [UIColor blackColor];
    self.targetCell.detailTextLabel.text = @"TEST";
    NSIndexPath *path = [self.tableView indexPathForSelectedRow];
    [self.tableView reloadData];
    [self.tableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:path.row inSection:0] animated:NO scrollPosition:UITableViewScrollPositionNone];
}

Upvotes: 1

Views: 1906

Answers (1)

chown
chown

Reputation: 52728

Try this:

- (void)pickerView:(UIPickerView *)pickerView didSelectRow: (NSInteger)row inComponent:(NSInteger)component { 
    // Handle the selection 
    self.targetCell.detailTextLabel.textColor = [UIColor blackColor];
    self.targetCell.detailTextLabel.text = @"TEST";
    [self.tableView reloadData];
    NSIndexPath *ip = [tableView indexPathForSelectedRow];

    // assuming self is the tableViews delegate.  Optional
    [self tableView:tableView willSelectRowAtIndexPath:ip];

    [tableView selectRowAtIndexPath:ip animated:YES scrollPosition:UITableScrollPositionTop];

    // assuming self is the tableViews delegate.  Optional
    [self tableView:tableView didSelectRowAtIndexPath:ip];
}

Upvotes: 1

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