How to change height of custom cell on button's click? - ios

Question

I have an issue regarding height of custom cell. I need to increase the height of cell when one button on cell was clicked. her I know to use two methods (heightforrow and didselectrow) for it but I am confuse that when I clicked on button that time custom method for button action is called and I am using those two methods in controller.I attached my code:
in customcell.m
- (IBAction)btnRestPlusClicked:(id)sender
{
UIButton *btn = (id)sender;
btn.selected =!btn.selected;
if (btn.selected)
{
NSLog(#"selected");
// _viewExtraScheduleAmount.hidden = FALSE;//I need to make this event on button action and same time increase the height of cell.
}
else
{
btn.tag = 0;
// _viewExtraScheduleAmount.hidden = TRUE;
}
now I need that when button clicked that time only that row's height will increase.
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
//if (ceel.btnRestPlusClicked.selected)
//{
// return 100;
// }
// return 60;
I know I am wrong here but how to use this method?
}
Please can any one help me out from this?
Thanks

Answer 1

Create NSMutableDictionary inside of UIViewController where you will store NSIndexPath of btnRestPlusClicked cells.
Then track when button plus selected in each cell:
In CustomCell.h
#protocol CustomCellDelegate;
#interface CustomCell : UITableViewCell
#property (nonatomic, weak) id<CustomCellDelegate> delegate;
#end
#protocol CustomCellDelegate <NSObject>
- (void)customCellButtonPlusSelected:(CustomCell*)cell;
#end
In CustomCell.m
- (IBAction)btnRestPlusClicked:(id)sender
{
[self.delegate customCellButtonPlusSelected:self];
}
In UIViewController when you create cell for cellForRowAtIndexPath add:
cell.delegate = self
and conform UIViewController to CustomCellDelegate
-(void)customCellButtonPlusSelected:(CustomCell*)cell {
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
NSString *key = [NSString stringWithFormat:#"%li:%li", indexPath.section, indexPath.row];
[buttonPlusClickedDictionary setObject:#"1" forKey:key];
[self.tableView reloadRowsAtIndexPaths:#[indexPath]];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *key = [NSString stringWithFormat:#"%li:%li", indexPath.section, indexPath.row];
if ([buttonPlusClickedDictionary objectForKey:key]) {
return 100;
}
return 60;
}

Answer 2

Try adding a boolean variable as class member. Set it when you click the button.
Reload the table view at the end of - (IBAction)btnRestPlusClicked:(id)sender
In - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath change the height of tableview cell if boolean variable is set.

Answer 3

The problem is not the implementation of heightForRowAtIndexPath: but in getting the runtime to call heightForRowAtIndexPath: again, so that it can discover that your cell height has changed. To do that, your button should tell the table view to reloadData.

Answer 4

You can change the height of your selected cell when you tap on that cell button like
ViewController.h
#interface ViewController : UIViewController <UITableViewDataSource, UITableViewDelegate>
{
IBOutlet UITableView *myTableView;
}
#end
ViewController.m
#interface ViewController ()
#end
#implementation ViewController {
NSArray *tableData;
int currentselection;
int cellno;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
currentselection = -1;
tableData = [NSArray arrayWithObjects:#"Egg Benedict", #"Mushroom Risotto", #"Full Breakfast", #"Hamburger", #"Ham and Egg Sandwich", #"Creme Brelee", #"White Chocolate Donut", #"Starbucks Coffee", nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [tableData count];
}
- (CGFloat)tableView:(UITableView )tableView heightForRowAtIndexPath:(NSIndexPath )indexPath {
int rowHeight;
if ([indexPath row] == currentselection) {
rowHeight = 200;
} else {
rowHeight = 50;
}
return rowHeight;
}
- (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *simpleTableIdentifier = #"SimpleTableItem";
NSInteger myInteger = indexPath.row;
cellno = (int) myInteger;
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
cell.textLabel.text = [tableData objectAtIndex:indexPath.row];
// add custom expand height button
UIButton *addFriendButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
addFriendButton.frame = CGRectMake(200.0f, 5.0f, 75.0f, 30.0f);
[addFriendButton setTitle:#"Add" forState:UIControlStateNormal];
[cell addSubview:addFriendButton];
[addFriendButton addTarget:self action:#selector(addHeight:) forControlEvents:UIControlEventTouchUpInside];
[addFriendButton setTag:cellno];
return cell;
}
- (IBAction) addHeight:(UIButton *)sender {
NSInteger myInteger = sender.tag;
currentselection = (int) myInteger;
[myTableView beginUpdates];
[myTableView endUpdates];
}