@interface MyTVC : UIViewController

@property (strong, nonatomic) NSMapTable switchesToIndexPaths;

@end

@implementation MyTVC

- (void)viewDidLoad {
	[super viewDidLoad];
	// Initialise the map table
	self.switchesToIndexPaths = [NSMapTable weakToStrongObjectsMapTable];

	....
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

	// Create the cell as usual
	// Map the switch of the cell with the indexpath
	[self.switchesToIndexPaths setObject:indexPath forKey:cell.switch];
	[cell.switch addTarget:self @selector:(switchValueChanged:) forControlEvents:UIControlEventValueChanged];

	// Do the other stuff and return the cell
}

- (void)switchValueChanged:(UISwitch *)switch {
	// Get the indexpath from the switch
	NSIndexPath *indexPath = [self.switchesToIndexPaths objectForKey:switch];

	if (indexPath != nil) {
		// You will now know exactly which row and section this switch was for

	}
}


@end