Still having trouble accessing variables to load into a custom cell. I have a xib, .h, .m named InSeasonCell. I have a IBOutlet InSeasonCell *_cell; in .h of rootviewcontroller. I get lldb error for accessing my productAtIndex values. Any help would be great. I was told to read the Table View Programming Guide.
I create
_dataController = [[InSeasonProductDataController alloc] init];
Which is init in the rootviewcontroller but passed to an other object which populates it with Product objects.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"InSeasonCell";
InSeasonCell *cell = (InSeasonCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
[[NSBundle mainBundle] loadNibNamed:CellIdentifier owner:self options:nil];
cell = _cell;
_cell = nil;
}
if(_dataController!=nil){
Product *productAtIndex = [_dataController objectInListAtIndex:indexPath.row];
// Configure the cell...
cell.name.text = productAtIndex.name;
cell.week.text = productAtIndex.week;
cell.image.image = productAtIndex.image;
}
return cell;
}
I looked through my code and found that I am passing an object created in one class to the other. for example:
-(id)initWithDataController:(InSeasonProductDataController *)dataController spinner: (UIActivityIndicatorView *)spinner{
if(self = [super init]){
_dataController = [dataController retain];
_spinner = [spinner retain];
}
return self;
}
_dataController gets populated with Product objects later in this method and is released.
To solve this error you need in your xib file click on cell prototype and in Attribute inspection > Identifier insert the same name as you have in .m file (I write down "cell"):
in method:
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
.......
Cell = [tableView dequeueReusableCellWithIdentifier:#"cell"];
Cell = [[MainCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"cell"];
I figured it out. My Product object initialized variables which I had to do a copy for each variable passed in. This got rid of the lldb error.
Related
I've created a cell with 2 UIButtons in the IB and subclassed it. How can I use it without reusing it over again? (for a small fixed table)
I tried doing something like:
RaffleResultCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
but that won't show my cell in the UITableView, just a blank one.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
//Where we configure the cell in each row
id currentRaffle = [_winnings objectAtIndex:indexPath.row];
RaffleResultCell *cell = [tableView dequeueReusableCellWithIdentifier:#"raffleResCell"];
if (cell == nil) {
cell = [[RaffleResultCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"raffleResCell"];
}
return cell;
}
It is not a good practice to avoid Reusability,I will say dont do it
Reusability is done in this line
RaffleResultCell *cell = [tableView dequeueReusableCellWithIdentifier:#"raffleResCell"];
Remove that line and just call alloc method everytime without the check loop
Like
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
id currentRaffle = [_winnings objectAtIndex:indexPath.row];
cell = [[RaffleResultCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"raffleResCell"];
return cell;
}
You told you set up the UITableViewCell in IB then you need to get Nib file and then use that file as
// Get nib file from mainBundle
NSArray* topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"RaffleResultCell" owner:self options:nil];
for (id currentObject in topLevelObjects) {
if ([currentObject isKindOfClass:[UITableViewCell class]]) {
RaffleResultCell *cell = (RaffleResultCell *)currentObject;
break;
}
}
now setup any text for your button and return cell
I want to create a custom tableViewCell programmatically.
This is what I do:
Creating a tableViewCell subclass and importing it to the tableViewController
In the tableViewController m:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = #"StoreCell";
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
if (cell == nil) {
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
return cell;}
In the CustomCell m:
-(id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
NSLog(#"Hello!");
}
return self;
}
(Sorry for not getting the code highlighting thing to work)
My problem is that the CustomCell don't get initialized. The initWithStyle never gets triggered. I followed a couple of tutorials and they do the exact same thing, but successfully..
With iOS 6, dequeReusableCellWithIdentifier:forIndexPath: always returns a cell, so your if-case never gets called.
If a cell with that identifier is not available, it initializes it itself.
Try implementing initWithCoder: in the UITableViewCell subclass, that's what gets called in that case.
In cellForRowAtIndexPath try this
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"StoreCell";
CustomCell *cell = (CustomCell*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[CustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
return cell;
}
I finally figured it out. The cells didn't get initialized because I was using prototypes cells in the storyboard. I set the prototypes cells to 0 and it works :)
im getting EXC_BAD_ACCESS when i scroll my TableView. I heard something like alloc being called wrong, I dont know. Here's my code:
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [[resultsDictionary objectForKey: #"bills"] count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// Identifier for retrieving reusable cells.
static NSString *cellIdentifier = #"MyCellIdentifier";
// Attempt to request the reusable cell.
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
// No cell available - create one.
if(cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:cellIdentifier];
}
NSArray *billsArray = [resultsDictionary objectForKey:#"bills"];
cell.textLabel.text = [NSString stringWithFormat:#"%#", [[billsArray objectAtIndex:indexPath.row] objectForKey:#"name"]];
return cell;
}
EDIT
I think the error is here:
* -[JKArray objectAtIndex:]: message sent to deallocated instance 0x6a5d030
NSString *cellName = [NSString stringWithFormat:#"%#", [[billsArray objectAtIndex:indexPath.row] objectForKey:#"name"]];
It looks like resultsDictionary is a dangling pointer. If you are using ARC, you need a strong reference to it somewhere. If you are not using ARC, you need to retain it somewhere.
Fixed. My billsArray was missing 'self' instance, as inside of cellForRowAtIndexPath method. Thanks to everyone.
I have a view controller that shows up a table view controller when a button is clicked. Everything works fine with table view delegates, table view is shown fine, but in ellForRowAtIndexPath: delegate method, cell is instantiated and returned, but it's not shown correctly.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"alrededor";
alrededorCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[alrededorCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSDictionary *categoria = [[NSDictionary alloc] initWithDictionary: [_categoriasArray objectAtIndex:indexPath.row]];
NSLog(#"categoria %#", categoria);
cell.title.text = [categoria valueForKey:#"title"];
return cell;
}
Many thanks
Why are you creating your cell like this?
if (cell == nil) {
cell = [[alrededorCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
If it is your own custom cell why do you use UITableViewCellStyleDefault ?
If the cell you are loading is a subclass of UITableViewCell and you've used the interface builder to build the cell you have to do a couple of things.
In the nib file delete the view that is there when you create it, add a UITableViewCell and change it's class to alrededorCell. Changes the cells class and not the file's owner. When you are linking buttons,labels etc . be sure to link them to the cell not to file's owner. Also set the cells uniqueIdentifier to alrededor.
In cellForRowAtIndexPath
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"alrededor";
alrededorCell *cell = [tableView
dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *xib = [[NSBundle mainBundle] loadNibNamed:#"nibName" owner:nil options:nil];
for (alrededorCell *view in xib) {
if ([view isKindOfClass:[alrededorCell class]]) {
cell = view;
}
}
}
NSDictionary *categoria = [[NSDictionary alloc] initWithDictionary: [_categoriasArray objectAtIndex:indexPath.row]];
NSLog(#"categoria %#", categoria);
cell.title.text = [categoria valueForKey:#"title"];
return cell;
}
When I try to import it gives error at the import stating "method definition not in #implementation context". I think the error lies within the following code...
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSDictionary *infoDictionary = [self.jsonArray objectAtIndex:indexPath.row];
static NSString *Prospects = #"agencyname";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:Prospects];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:Prospects] autorelease];
}
// setting the text
cell.text = [infoDictionary objectForKey:#"agencyname"];
// Set up the cell
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
ViewAgencyController *dvController = [[ViewAgencyController alloc] initWithNibName:#"ViewAgency" bundle:[NSBundle mainBundle]];
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
Cant Figure it out.
All objective-C method definitions must be between #implemention and #end compiler directives. Without those, there's no way for the compiler to know what class you want the method to belong to.
Look at your header and make sure you have an #end directive to close your class declaration, and look at your .m file and make sure you have an #implementation directive before, and an #end after your method implementations.