CODEWITHSUNDEEP
iphoneobjective-cxcode
suji
suji

Reputation: 1470

Hiding the table view cells with switch ON/OFF in iPhone

This may be a simple question for you experts but I can't figure out the correct solution.

In my app I created a a table view to list a no of items.

In the first row of the cell there a switch (ON/OFF).

So my client need to hide the bottom cells(other than zeroth cell) when switch is OFF and show all the cells when switch is ON.

I created the switch through code.

Can anyone please help me with how to do this?

Thanks in advance.

Upvotes: 2

Views: 4911

Answers (3)

HelmiB
HelmiB

Reputation: 12333

You could use insertRowsAtIndexPaths, this will not only add, but also do the animation of adding new row

first add target UIControlEventTouchUpInside into UISwitch.

[switch addTarget:self action:@selector(switchChange:) forControlEvents:UIControlEventValueChanged];

-(void) switchChange:(UISwitch*) sender{

       isSwitchOn = sender.on; //edited
    [myTable beginUpdates];
    NSIndexPath *row1 = [NSIndexPath indexPathForRow:1 inSection:0];
    NSIndexPath *row2 = [NSIndexPath indexPathForRow:2 inSection:0];
    //you may add as many row as you want here.

    [myTable insertRowsAtIndexPaths:[NSArray arrayWithObjects:row1,row2,nil] withRowAnimation:UITableViewRowAnimationMiddle];
    [myTable endUpdates];

}

and make sure you will add how many rows you will insert in numberOfRowsInSection:

  • (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    if (isSwitchOn) return 1;

    else return 3; //how many rows would have after switched on

}

You might want to check [myTable insertSections:withRowAnimation: to insert another section and do the same as above. but remember to state how many section you will add, in numberOfSectionsInTableView:

UPDATE :

implement deleteRowsAtIndexPaths: if switch off.

-(void) switchChange:(UISwitch*) sender{

    isSwitchOn = sender.on;

  if(isSwitchOn){
        [myTable beginUpdates];
         NSIndexPath *row1 = [NSIndexPath indexPathForRow:1 inSection:0];
         NSIndexPath *row2 = [NSIndexPath indexPathForRow:2 inSection:0];
         //you may add as many row as you want here.

        [myTable insertRowsAtIndexPaths:[NSArray arrayWithObjects:row1,row2,nil]  withRowAnimation:UITableViewRowAnimationMiddle];
        [myTable endUpdates];
    }
  else{
        [myTable beginUpdates];
         NSIndexPath *row1 = [NSIndexPath indexPathForRow:1 inSection:0];
         NSIndexPath *row2 = [NSIndexPath indexPathForRow:2 inSection:0];
         //you may add as many row as you want here.

        [myTable deleteRowsAtIndexPaths:[NSArray arrayWithObjects:row1,row2,nil]  withRowAnimation:UITableViewRowAnimationFade];
        [myTable endUpdates]; 
 }

}

Upvotes: 6

mbh
mbh

Reputation: 3312

numberOfRows dataSource method - make it return 1 and reloadTableView 

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  /// ....
            self.switchView = [[[UISwitch alloc] initWithFrame:CGRectZero]autorelease];
            cell.accessoryView = self.switchView;
            [self.switchView setOn:NO animated:NO];
            [self.switchView addTarget:self action:@selector(switchChanged:) forControlEvents:UIControlEventValueChanged];

//....

}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
   if [self.switchView.on]
       return 1;
   else 
   {
      // normal code return
   }
}

- (void) switchChanged:(id)sender {
     [self.tableView reloadData];
}

Upvotes: 6

Mikayil Abdullayev
Mikayil Abdullayev

Reputation: 12367

There's a UITableViewDataSource method called tableView:numberOfRows:inSections method.Just check for the state of the switch and return 1 if it's OFF or all the rows if it is ON. Just call the [tableView reloadData] method each time you switch ON and OFF. As simple as that.

Upvotes: 1

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