error with checkmark code - objective-c

In my cellForRow code I have the following and am getting an error saying nothing is being returned. What have I done wrong? Thanks.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
if([self.checkedIndexPath isEqual:indexPath])
{
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else
{
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}


This is an endless loop: UITableViewCell* cell = [tableView cellForRowAtIndexPath:indexPath];
This should be:
static NSString *reuseIdentifier = #"some_identifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:reuseIdentifier];
if(cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:reuseIdentifier] autorelease]
}


Your cellForRowAtIndexPath will look something like this (for the most Basic Table View)
- (UITableViewCell *) tableView :(UITableView *) tableView cellForRowAtIndexPath :(NSIndexPath *) indexPath
{
static NSString *SimpleTableIdentifier = #"SimpleTableIdentifier ";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SimpleTableIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:SimpleTableIdentifier] autorelease];
}
NSUInteger row = [indexPath row];
cell.textLabel.text = [listData objectAtIndex :row];
cell.textLabel.font = [UIFont boldSystemFontOfSize:50];
return cell;
}

Related

Is it possible to load two screens of pictures on top and on the bottom at the same time as on the screen with UITableview cell

*My code
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"ExploreTBLCellID";
ExploreTBLCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[ExploreTBLCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
NSLog(#"new one");
}
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
NSDictionary *distGetData;
distGetData = [arrget_smart_category objectAtIndex:indexPath.row];
[imgMain sd_setImageWithURL:[NSURL URLWithString:[distGetData objectForKey:#"image"]]
placeholderImage:imgPlaceholderExlore];
return cell;
}

Tableview Checkmark not display using iOS storyboard with objective C

I am trying to create tableview with tableviewcell and whenever user select the tableviewcell It should apply checkmark. My tableview and tableview cell everything I have created by iOS storyboard. Please help step by step how to solve my issue.
My Source:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *cellIdentifier = #"cellID";
myTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[myTableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
NSString *stringForCell;
if (indexPath.section == 0) {
stringForCell= [myData objectAtIndex:indexPath.row];
}
else if (indexPath.section == 1){
stringForCell= [myData objectAtIndex:indexPath.row+ [myData count]];
}
[cell.sec_Label setText:stringForCell];
return cell;
}

You can do this way,first thing declare the variable's in header files
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *cellIdentifier = #"cellID";
myTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
cell = [[myTableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.accessoryType = UITableViewCellAccessoryCheckmark;
cell.tintColor = [UIColor blackColor];
NSString *stringForCell; // Mention in header file
if (indexPath.section == 0) {
stringForCell= [myData objectAtIndex:indexPath.row];
}
else if (indexPath.section == 1){
stringForCell= [myData objectAtIndex:indexPath.row+ [myData count]];
}
[cell.sec_Label setText:stringForCell];
return cell;
}

write this in your tableview delegate function
- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
UITableViewCell* cell ....//some creation
cell.accessoryType=UITableViewCellAccessoryCheckmark;
//cell.accessView don't set this, if set, use custom view. ignore accessoryType
return cell;
}

data getting overlaped in tableview cell

I m parsing json data and assigning it in my table view cell.where in the first row of tableview cell .i m assigning a static data(green text).if i scroll my tableview the data assigned in first table view cell is getting overlaped in my 6th and 7th tableview cell.below is the screen shotand the code.could u guys help me out
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] autorelease];
}
if(indexPath.row == 0)
{
cell.textLabel.text=#"Pollenprognosen";
cell.textLabel.textColor=[UIColor greenColor];
cell.detailTextLabel.text=#"se dagens pollenprognos";
cell.detailTextLabel.font=[UIFont systemFontOfSize:([UIFont systemFontSize]-2)];
return cell;
}
else
{
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.text=[story objectAtIndex:indexPath.row];
return cell;
}
}

I think it's because the cell is reused. Try this code instead:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:CellIdentifier] autorelease];
}
if(indexPath.row == 0)
{
cell.textLabel.text=#"Pollenprognosen";
cell.textLabel.textColor=[UIColor greenColor];
cell.detailTextLabel.text=#"se dagens pollenprognos";
cell.detailTextLabel.font=[UIFont systemFontOfSize:([UIFont systemFontSize]-2)];
cell.accessoryType=UITableViewCellAccessoryNone;
return cell;
}
else
{
cell.textLabel.text=[story objectAtIndex:indexPath.row];
cell.textLabel.textColor=[UIColor blackColor];
cell.detailTextLabel.text=nil;
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
}

Just make the else part as follows.
else
{
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.text=[NSString stringWithFormat:#"Cell %d",indexPath.row];
cell.textLabel.textColor=[UIColor blackColor];
cell.detailTextLabel.text=#"";
return cell;
}

Issue with multiple UITableViewCellAccessoryCheckmark applied on single UITableCell touch

so I have a lot of cells in my UITableView and on touching a cell, additional cells that are just out of view also have ticks applied. I believe this is because the cells are being reused or something due to dequeueReusableCellWithIdentifier:
Heres my code:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
if (cell.accessoryType == UITableViewCellAccessoryNone){
[addPapersSelectedRowsArray addObject:[NSNumber numberWithInt:indexPath.row]];
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else if (cell.accessoryType == UITableViewCellAccessoryCheckmark){
cell.accessoryType = UITableViewCellAccessoryNone;
[addPapersSelectedRowsArray removeObject:[NSNumber numberWithInt:indexPath.row]];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSDictionary *currentPapersSecltion = [papersDataDictionary objectAtIndex:indexPath.row];
[[cell textLabel] setText:[currentPapersSecltion objectForKey:#"Title"]];
return cell;
}
Also pulling data from a .plist in viewDidLoad:
//Load papers data from the local plist
papersDataDictionary = [[[NSDictionary alloc] initWithContentsOfFile:[[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent:#"papers.plist"]] objectForKey:#"Rows"];
Does anyone know how to fix this?
Thanks guys!
Dex

In cellForRowAtIndexPath which you need to set your checkmark according to whether or not the cell has been selected.
if ([addPapersSelectedRowsArray containsObject:[NSNumber numberWithInt:[indexPath row]]]) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else {
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;

UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
// add this line
cell.accessoryType = UITableViewCellAccessoryNone;
if (cell.accessoryType == UITableViewCellAccessoryNone){
[addPapersSelectedRowsArray addObject:[NSNumber numberWithInt:indexPath.row]];
[cell setAccessoryType:UITableViewCellAccessoryCheckmark];
}
else if (cell.accessoryType == UITableViewCellAccessoryCheckmark){
cell.accessoryType = UITableViewCellAccessoryNone;
[addPapersSelectedRowsArray removeObject:[NSNumber numberWithInt:indexPath.row]];
}
//add this line as well
[tableView reloadData];

UITableView Checklist

I'm making a checklist program using UITableView and I managed to implement everything up to selection and making a checkmark appear. However, when I scroll away from the cells. The checkmark disappears.
I have the following code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"CellIdentifier";
// Dequeue or create a cell of the appropriate type.
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
if(tableView == Table1){
switch(indexPath.section){
case 0:
cell.textLabel.text =[array1 objectAtIndex:indexPath.row];
break;
case 1:
cell.textLabel.text = [array2 objectAtIndex:indexPath.row];
break;
case 2:
cell.textLabel.text = [array3 objectAtIndex:indexPath.row];
break;
}
//cell.textLabel.text = [NSString stringWithFormat:#"Row %d", indexPath.row];
}
//if([indexPath compare:[selectedArray objectAtIndex:i]] == NSOrderedSame){
if([selectedArray containsObject:cell]){
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
//}
if(tableView == sauceTable){
cell.textLabel.text = [array4 objectAtIndex:indexPath.row];
}
return cell;}
And:
- (void)tableView:(UITableView *)aTableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *c= [aTableView cellForRowAtIndexPath: indexPath];
c.accessoryType = UITableViewCellAccessoryCheckmark;
[selectedArray addObject: c];
}
Any ideas?

Solved. Used NSIndexPath instead of UITableViewCell for the selectionArray