如果我将UISwitch控件添加到每个表视图单元格中，如何判断它属于哪个单元格？

Question

I have a UITableView with cells that contain a UISwitch control. It's similar to the table view in the iPhone's Clock app shown below...

_{(source: epicself.com )}

In my app's cellForRowAtIndexPath method, I create and attach the UISwitch control like so...

 CGRect frameSwitch = CGRectMake(215.0, 10.0, 94.0, 27.0);
 UISwitch *switchEnabled = [[UISwitch alloc] initWithFrame:frameSwitch];
 [switchEnabled addTarget:self action:@selector(switchToggled:) forControlEvents:UIControlEventValueChanged];

 cell.accessoryView = switchEnabled;

My question is, when the switch is toggled by the user and the switchToggled method is called, how can I tell which table cell it belongs to? I can't really do much with it without knowing it's context.

Thanks so much in advance for your help!

Answer 1

First of all, fix the memory leak:

UISwitch *switchEnabled = [[[UISwitch alloc] initWithFrame:frameSwitch] autorelease];

Then pick one of these options:

switchEnabled.tag = someInt; // before adding it to the cell

NSLog(@"switched %d",switch.tag); // to see which switch was toggled

or

UITableViewCell *parentCell = switchEnabled.superview;
// + some magic to see which cell this actually is

Answer 2

In your action method, you can cast the superview of the passed-in UISwitch (which is the UITableViewCell itself), then pass that to the tableView 's indexPathForCell method.

indexPathForCell will return a NSIndexPath object, which you can then use to index to your datamodel to modify. Then all you gotta do is call reloadData on your tableView .

Also, in cellForRowAtIndexPath , you should set the UISwitch 's state based on your model.