Select UITableView's row when clicking on UISwitch

Question

I have a UITableView with UISwitchs on them.

When the switch is

Answer 1

A better way to do this is determine which cell the sender is in.

- (UITableViewCell *)findCellForView:(UIView *)view
{
    for (; view != nil; view = view.superview)
        if ([view isKindOfClass:[UITableViewCell class]])
            return view;
    return nil;
}

Once you have this method. then it's a matter of replacing [self.inputTableView indexPathForSelectedRow] with

UITableViewCell *cell = [self findCellForView:sender];
NSIndexPath *indexPath = [self.inputTableView indexPathForCell:cell];

Answer 2

You should set the IndexPath.row as a Tag to each Switch in cellForRowAtIndexPath Method

 switchView.tag= indexPath.row;

And when switch value change .you'll get the Row number

- (void) switchChanged:(UISwitch *)sender {
  int rowIndex =[sender tag];
  //rowIndex you may use it further as you wanted.   

}

Answer 3

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController<UITableViewDataSource,UITableViewDelegate>
@property (retain, nonatomic) IBOutlet UITableView *tableview;

@end


@interface ViewController ()
{
    NSMutableArray *arr;
    UITableViewCell* aCell;
    UISwitch *myswitch;
}


#import "ViewController.h"

@interface ViewController ()
{
    NSMutableArray *arr;
    UITableViewCell* aCell;
    UISwitch *myswitch;
}

@end

@implementation ViewController
@synthesize tableview;

- (void)viewDidLoad
{
    [super viewDidLoad];

    arr = [[NSMutableArray alloc]initWithObjects:@"1",@"2",@"3",@"4",@"5", nil];
    // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;
{
    return [arr count];
}



- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;
{
    aCell = [tableview dequeueReusableCellWithIdentifier:@"SwitchCell"];

    if( aCell == nil )
      {
        aCell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"SwitchCell"];
        aCell.textLabel.text = [arr objectAtIndex:indexPath.row];
        myswitch = [[UISwitch alloc]initWithFrame:CGRectZero];
        aCell.accessoryView = myswitch;
        [myswitch setOn:YES animated:YES];

       }
    switch (indexPath.row)

    {
        case 0:
        {
            [myswitch addTarget:self action:@selector(switchChanged:) forControlEvents:UIControlEventValueChanged];

        }
            break;
        case 1:
        {
            [myswitch addTarget:self action:@selector(switchChanged1:) forControlEvents:UIControlEventValueChanged];
        }
            break;

    }
    return aCell;
}

- (void) switchChanged:(id)sender {
    UISwitch *aswitch = sender;

    if (aswitch.on==YES) {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"hello" message:@"okfine" delegate:self cancelButtonTitle:@"done" otherButtonTitles:nil, nil];
        [alert show];
    }
    else
    {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"no1" message:@"notfine" delegate:self cancelButtonTitle:@"Returnback" otherButtonTitles:nil, nil];
        [alert show];

    }

}
- (void) switchChanged1:(id)sender {
    UISwitch *aswitch1 = sender;

    if (aswitch1.on==YES) {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"second" message:@"okfine" delegate:self cancelButtonTitle:@"done" otherButtonTitles:nil, nil];
        [alert show];
    }
    else
    {
        UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"no2" message:@"notfine" delegate:self cancelButtonTitle:@"Returnback" otherButtonTitles:nil, nil];
        [alert show];

    }
  }


- (void)dealloc {
    [tableview release];
    [super dealloc];
}
@end

Answer 4

To find the cell that holds the switch

UISwitch *switchInCell = (UISwitch *)sender;
UITableViewCell * cell = (UITableViewCell*) swithInCell.superview;

To find the indexpath of that cell

NSIndexPath * indexpath = [myTableView indexPathForCell:cell]

In your case

 - (void) switchChanged:(id)sender {

         UISwitch *switchInCell = (UISwitch *)sender;
         UITableViewCell * cell = (UITableViewCell*) swithInCell.superview;
         NSIndexPath * indexpath = [myTableView indexPathForCell:cell]
         NSString *strCatID =[[NSString alloc]init];
         strCatID = [self.catIDs objectAtIndex:indexpath];
         NSLog( @"The switch for item %@ is %@",StrCatID, switchInCell.on ? @"ON" : @"OFF" );
        }

Answer 5

You can retrieve the NSIndexPath for the UISwitch that was changed in the tableview. This is the same idea for any control as already answered in this post : Detecting which UIButton was pressed in a UITableView

- (void) switchChanged:(id)sender 
{
    CGPoint switchPositionPoint = [sender convertPoint:CGPointZero toView:[self tableView]];
    NSIndexPath *indexPath = [[self tableView] indexPathForRowAtPoint:switchPositionPoint];
}

This will work for iOS7, previously I used [sender superview] but that now returns a UITableViewCellContentView inside of a UITableViewCellScrollView.

Answer 6

I think the problem is that you use dequeueReusableCellWithIdentifier, and all of your cell has the same id.