In my app I have custom UITableViewCell, and I have UIStepper and UILabel in the custom cell. I don't know how to check which stepper was clicked. So is it a way to know from which cell stepper was clicked?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell;
NSString *CellIdentifier = #"Cell";
cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
if ([nib count] > 0) {
cell = self.tbcell;
}
}
return cell;
}
An alternative is:
In the method that gets fired when the UIStepper value changes (e.g. #max_, above), you can do the following:
- (IBAction)stepperValueDidChanged:(UIStepper *)sender {
UITableViewCell *cell = (UITableViewCell *)[[sender superview] superview];
// assuming your view controller is a subclass of UITableViewController, for example.
NSIndexPath *indexPath = [self.tableView indexPathForCell:cell];
}
[step addTarget:self action:#selector(someAction:) forControlEvents:UIControlEventValueChanged];
- (void) someAction:(UIStepper *) stepper {
NSLog(#"stepper clicked");
}
Related
i have one view controller
Name : FirstVC
i have table view in that view controller. in my table view i load a custom cell. in my custom cell there is 1 label and 1 button. i set label as well as button of custom cell from FirstVC. See bellow code.
in FirstVC.h
#interface FirstVC : UIViewController <UITableViewDataSource, UITableViewDelegate>
{
IBOutlet UITableView *TblView;
IBOutlet CustomCell *customCell;
}
- (void)addCounter:(NSInteger)pCat_ID;
#end
in FirstVC.m
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *cellIdentifier = #"Cell";
CustomCell *cell = (CustomCell*)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if(cell == nil){
[[NSBundle mainBundle] loadNibNamed:#"CustomCell_iPhone" owner:self options:nil];
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
cell = categoryCustomCell;
}
NSInteger pCat_id = [[[arrayCategoryData objectAtIndex:indexPath.row] objectForKey:#"cat_id"] integerValue];
[customCell setTextForLable:#"Test"];
[customCell setAddCounterButton:pCat_id];
return cell;
}
- (void)addCounter:(NSInteger)pCat_ID
{
//Some code here….
}
in CustomCell.h
#interface CustomCell : UITableViewCell
{
IBOutlet UILabel *lblCategoryName;
IBOutlet UIButton *btnAddCounter;
}
- (void)setTextForLable:(NSString *)cat_name;
- (void)setAddCounterButton:(NSInteger)cat_ID;
#end
in CustomCell.m
#implementation CustomCell
- (void)setTextForLable:(NSString *)cat_name
{
lblCategoryName.text = cat_name;
}
- (void)setAddCounterButton:(NSInteger)cat_ID
{
[btnAddCounter addTarget:self action:#selector(addCounter:cat_ID) forControlEvents:UIControlEventTouchUpInside];
}
#end
i want to call addCounter:(NSInteger)pCat_ID method from custom cell. but this idea can not worked. Please suggest me new idea.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *cellIdentifier = #"Cell";
CustomCell *cell = (CustomCell*)[tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if(cell == nil){
[[NSBundle mainBundle] loadNibNamed:#"CustomCell_iPhone" owner:self options:nil];
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
cell = categoryCustomCell;
}
NSInteger pCat_id = [[[arrayCategoryData objectAtIndex:indexPath.row]
// call your method from here.. and put your method in this file then it will work for you
[cell.btnAddCounter addTarget:self action:#selector(addCounter:pCat_id) forControlEvents:UIControlEventTouchUpInside];
return cell;
}
I want to have a custom cell in my UITableview. I have tried it with the following:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
CustomCell *cell = (CustomCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"Cell" owner:nil options:nil];
for (UIView *view in views) {
if([view isKindOfClass:[UITableViewCell class]])
{
cell = (CustomCell*)view;
}
}
}
[cell setLabelText:[daten objectAtIndex:indexPath.row]];
return cell;
}
But I am getting an exception on that line:
CustomCell *cell = (CustomCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
I'm almost sure that you have lost connection in your XIB file. If commentLabel is still exists you should either delete it and create a new outlet or check the outlets section and delete extra connection and all will be alright!!
EDIT:
This error occurs when you have two outlets connected to the same label in IB.
This is how I made my custom cell and called it from the class :-
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:[cell reuseIdentifier]];
if (cell == nil)
{
[[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
cell = customCell;
customCell = nil;
}
// Configure the cell.
cell.serialLabel.text = [[NSNumber numberWithInt:indexPath.row+1]stringValue];
cell.textLabel.textColor=[UIColor whiteColor];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
return cell;
}
if u are not using the latest ios SDK, make sure that u have written
#synthesize commentLabel;
in CustomCell
Try cleaning the build folder, or try Simulator -> Reset Content and Settings.
I am doing customized cell for uitable view like below
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = #"overViewCell";
tableCell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if ( tableCell == nil ) {
[[NSBundle mainBundle] loadNibNamed:#"OverViewCell" owner:self options:nil];
tableCell = overViewCell;
self.overViewCell = nil;
}
..............................................................
}
and OverViewCell.xib looks like ( the right image is tagged as 3 )
And later, I would like to change the image of particular cell from the table view by doing this
- (void) updateImageView {
// currentRow is getting value when cellForRowAtIndex is clicked
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:currentRow inSection:0];
UITableViewCell *cell = [self.tableContent cellForRowAtIndexPath:indexPath];
imageView = (UIImageView*)[cell viewWithTag:3];
imageView.image = [UIImage imageNamed:#"checked.png"];
[self dismissViewControllerAnimated:YES completion:nil];
}
However, the image is not changed at all
What I am missing in the middle... Please help if you have any clues about this issue.
I figured what the problem is. it is because I was assigning the wrong tag to that image
I subclassed UITableViewCell and added a button to it. How do I response to the event when the button is touched? I also need to know which index path was the button pressed on.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"CustomTableCell";
CustomTableCell *cell = (CustomTableCell *)
[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle]
loadNibNamed:#"CustomTableCell"
owner:nil options:nil];
for (id currentObjects in topLevelObjects){
if ([currentObjects isKindOfClass:[StatusTableCell class]]){
cell = (StatusTableCell *) currentObjects;
break;
}
}
}
cell.customButton.tag = indexPath.row;
return cell;
}
If you have added the UIButton by code in your UITableViewCell Subclass you can use the following code to add an action for it.
//In UITableViewCell subclass
[customButton addTarget:self
action:#selector(aMethod:)
forControlEvents:UIControlEventTouchDown];
And then you have already written the code for accessing the row number by setting,
cell.customButton.tag = indexPath.row;
You can get the tag value in the aMethod and access the indexPath.row value like below,
//In UITableViewCell subclass
-(IBAction)aMethod:(UIButton*)button
{
NSLog(#"indexPath.row value : %d", button.tag);
}
You can assign the IBAction in the CustomTableCell Nib and in the function do something like this:
- (IBAction) btnDoSomethingPressed:(id)sender {
NSIndexPath *indexPath = [yourTableView indexPathForCell:(UITableViewCell *)[[sender superview] superview]];
//Use indexPath (or indexPath.row) like you would in a UITableViewDelegate method
}
This assumes that yourTableView is an instance variable assigned to your table.
I want to display custom cells, but my code is only displaying one custom table cell at once.. what am I doing wrong?
I have a UIViewController nib set up with my UITableView inside the UIView. Also there is a UITableViewCell in the nib, whose class is CustomCell (a subclass of UITableViewCell). Both the UITableView and the Cell are #sythesized IBOutlet #properties.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = #"CellIdentifier";
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; // CustomCell is the class for standardCell
if (cell == nil)
{
cell = standardCell; // standardCell is declared in the header and linked with IB
}
return cell;
}
You can use below sample code;
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = #"CellIdentifier";
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier]; // CustomCell is the class for standardCell
if (cell == nil)
{
NSArray *objectList = [[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
for (id currentObject in objectList) {
if([currentObject isKindOfClass:[UITableViewCell class]]){
cell = (CustomCell*)currentObject;
break;
}
}
}
return cell;
}
You should create a new cell every time dequeueReusableCellWithIdentifier return nil
Usually it should looks like
...
if (cell == nil)
{
cell = [[[NSBundle mainBundle] loadNibNamed:#"MyCell" owner:nil options:nil] objectAtIndex:0]
}
...
p.s. instead of objectAtIbndex: you can traverse through the array returned and use isKingOfClass:[MyCell class] to find the cell
The cell must have its content set for the given index path, even if the cell itself is dequeued, e.g.:
if (cell == nil) {
/* instantiate cell or load nib */
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil] autorelease];
}
/* configure cell for a given index path parameter */
if (indexPath.row == 123)
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
else
cell.accessoryType = nil;
/* etc. */
return cell;
If the cell == nil then you need to instantiate a new UITableViewCell.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = #"CellIdentifier";
CustomCell *cell = (CustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
// Instantiate a new cell here instead of using the "standard cell"
CustomCell *cell= [[[CustomCell alloc] init reuseIdentifier:CellIdentifier] autorelease];
// Do other customization here
}
return cell;
}