hightlight custom-drawn cell on touchdown iphone

Question

Hey Guys,

I am custom drawing cells, how can I hightlight the cells on touchdown

thanks

Answer 1

Use one or both of these:

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

- (NSIndexPath *)tableView:(UITableView *)tableView willSelectRowAtIndexPath:(NSIndexPath *)indexPath

You have to provide these methods and they will be called when the row is being selected. It is up to you to change your view to make it look selected. If you haven't made to many changes to the cells, you may be able to use selectedBackgroundView for highlighting selections.

Answer 2

The UITableViewCell has two methods that get called:

- (void) setHighlighted:(BOOL)highlighted

- (void) setSelected:(BOOL)selected

Basically setHighlighted gets called on touch down (and unset on touch up) whereas setSelected gets calls when the selection is "stuck" (the user meant to press the cell). If you play around with a normal table view and cell combo, you'll notice that the cells can highlight briefly and unhighlight when you scroll away from them.

To highlight the background, if you are using a custom background fill in drawRect you can change the color of that and call setNeedsDisplay in setHighlighted to make it force a redraw using your new background.

Answer 3

It doesn't work for a custom cell

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

I used the UIImageView inside of a custom cell to animate it.

  - (IBAction)highlighteMe
{
    shadowImage.alpha = 0.f;
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDelegate:self];
    [UIView setAnimationDuration:0.3];
    shadowImage.alpha = 0.3f;
    [UIView commitAnimations];
}