I'm building an app where I use custom tableView Cells and i'm not really sure, if I do it right:
I'm not really sure about the cellOwner for example...
And the basic problem is, that all outlets that I defined and hocked up in IB, are nil at runtime.
Here is what I did:
build a custom subclass of UITableViewCell (ProductListTableViewCell)
made a nib, containing a UITableViewCell as root element
set both the className and the owners Type of the cell to ProductListTableViewCell
set the reuse identifier
then put a couple of Labels etc onto the cell and generated the outlets via drag and drop
double checked that all outlets are hocked up correctly.
The outlets however are all nil.
What am I doing wrong ?
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = #"ProductListTableViewCell";
ProductListTableViewCell *cell =(ProductListTableViewCell*) [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (cell == nil) {
ProductListTableViewCell *cellOwner = [[ProductListTableViewCell alloc]init];
UINib* nib = [UINib nibWithNibName:#"ProductListTableViewCell" bundle:nil];
cell =(ProductListTableViewCell*) [[nib instantiateWithOwner:cellOwner options:nil]objectAtIndex:0];
}
// all outlets are nil here
try this
static NSString *CellIdentifier = #"ProductListTableViewCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
[[NSBundle mainBundle] loadNibNamed:#"ProductListTableViewCell" owner:self options:nil];
cell = ProductListTableViewCell;
self.ProductListTableViewCell=nil;
}
Related
I have a UITableView that I am populating with custom UITableViewCell in interface builder. I am having some issues accessing these custom tableviewcells properties and am hoping for some help.
In Interface Builder I am setting the custom tableviewcell's class to the current View controller (so I can assign all of the label objects to the correct labels in Interface Builder), So I have also set up the IBOutlet labels to the correct labels in Interface Builder However this error occurs when I try to pass the NSString from the array object variable (which is of type NSString) to the UIlabel's text.
Property 'cellDescription' not found on object of type 'UITableViewCell *'
Below is the code I have used to set up my tableview with the custom tableviewcell and then try to populate the cells UILabels with the correct text..
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (indexPath.section == 0) {
// Set cell height
[self tableView:tableView heightForRowAtIndexPath:indexPath];
// Configure the cell using custom cell
[[NSBundle mainBundle] loadNibNamed:#"AutomotiveSearchCell" owner:self options:nil];
cell = autoSearchCell;
//call dataArrayOfObject that has all of the values you have to apply to the custom tableviewcell
SearchResultItem* myObj = (SearchResultItem*)[dataArrayOfObjects objectAtIndex:indexPath.row];
cell.cellDescription.text = myObj.seriesDescription; // This is where I am receiving the error
NSLog(#"%#", myObj.seriesDescription); // This logs the correct value
//Disclosure Indicator
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
return cell;
}
you must typeCasting UITableViewCell To AutomotiveSearchCell
I think you code somewhere is strange(There is no declaration for autoSearchCell), but you must do the following.
cell = (AutomotiveSerachCell* )autoSearchCell;
The above code does not work, should following code.
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
convert to
AutomotiveSearchCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
If that does not work above, refer a following process.
make a CustomCell Class.
make a CustomCell xib.
linked label to CustomCell Class.
import header #import "AutomotiveSearchCell.h" and following code copy and paste.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
AutomotiveSearchCell *cell = nil;
if(!cell)
{
UINib *nib = [UINib nibWithNibName:#"AutomotiveSearchCell" bundle:nil];
NSArray *arr = [nib instantiateWithOwner:nil options:nil];
cell = [arr objectAtIndex:0];
cell.cellDescription.text = #"Test~!~!~!";
}
// Configure the cell...
return cell;
}
I am having trouble getting my CustomTableViewCell, a subclass of UITableViewCell to appear in my table view.
I am using a xib to represent that cell, but I am assuming that the code for the data source delegate doesn't change. I made sure to set an identical reuse identifier inside the table view cell XIB.
I isolated the problem to the fact that the datasource method that returns the table cell isn't working correctly, here it is:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
CustomTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
DataObject *foo = [self.dataArray objectAtIndex:indexPath.row];
if (cell == nil)
{
cell = [[CustomTableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
[[cell overview] setText:foo.overview];
[[cell price] setText:foo.price];
NSLog(#"cell initialized, description text is %#",cell.overview.text);
return cell;
}
Not sure why this isn't working, but that last log statement always prints a (null) at the end, and yes I did verify that the overview property of the data object has a valid string in it. Same thing for price.
1) Make your Custom cell class separate
2) XIB : File Owner class change to NSObject
3) XIB : UITableViewCell change to MyTableViewCell
4) Where you want to add inside table view code as
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = #"MyCell";
MyTableViewCell *cell = (MyTableViewCell*) [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *arrayCellXib = [[NSBundle mainBundle] loadNibNamed:#"MyTableViewCell"
owner:self
options:nil];
if (indexPath.row == 0) {
// first table cell
cell = [arrayCellXib objectAtIndex:0]; // *
......
}else {
cell = [arrayCellXib objectAtIndex:1]; // *
}
...
}
return cell;
}
Object at index 0,1 ... are index for which order you make MyTableViewCell in xib, if you want to have more than one custom cell. means in a MyTableViewCell class u make unlimited custom cell and use according to requirement.
Normally, just make ONE custom cell in the XIB and do exactly this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
int thisRow = indexPath.row;
NSString *exampleText = [yourData objectAtIndex:thisRow];
static NSString *CellID = #"cu5";
FancyCell *cell =
(FancyCell *)[tableView dequeueReusableCellWithIdentifier:CellID];
if (cell == nil)
{
NSArray *cellTeam =
[[NSBundle mainBundle] loadNibNamed:#"FancyCell"
owner:self options:nil];
cell = [cellTeam objectAtIndex:0];
}
[cell someFunction:exampleText];
[cell.someLabel setText:exampleText];
return cell;
}
Hoping may help u :)
In .h file, you write it.
IBOulet CustomTableViewCell *tableCell;
and connect to File's Owner in CustomTableViewCell's .xib file.
You modify this in (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
if (cell == nil)
{
[[NSBundle mainBundle] loadNibNamed:#"CustomTableViewCell" owner:self options:nil];
cell = tableCell;
}
I think it will be helpful to you.
I am having trouble wiht UITableViewCell loaded from nib. I used apple documentation to that but I do't know where I am going wrong. UITableViewCell created through IB contains 5 UIlable. Nib are loaded perfectly but the problem is when I scroll text of the label changes automatically to different.
Following is the my code for cell for row at indexpath. Please let me know where I am going worng.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
int rowNo = [indexPath row];
NSLog(#"Row No:%d",rowNo);
Transfer *tempTransferRecord =(Transfer*)[self.transferInformation objectAtIndex:rowNo];
seasonYear.text=tempTransferRecord.seasonYear;
longName.text=tempTransferRecord.longName;
transactionDate.text=tempTransferRecord.transactionDate;
toTeam.text=tempTransferRecord.toTeam;
fromTeam.text=tempTransferRecord.fromTeam;
/*
static NSString *MyIdentifier = #"MyIdentifier2";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:MyIdentifier] ;
if (cell == nil)
{
[[NSBundle mainBundle] loadNibNamed:#"PlayerTransfers" owner:self options:nil];
cell=transfersInfoCell;
self.transfersInfoCell=nil;
}
*/
static NSString *CellIdentifier = #"MyIdentifier2";
static NSString *CellNib = #"PlayerTransfers";
UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:CellNib owner:self options:nil];
cell = (UITableViewCell *)[nib objectAtIndex:0];
}
// perform additional custom work...
return cell;
}
Try moving your cell loading code to the top of cellForRowAtIndexPath, and the rowNo and value setting after that. Cells changing content must mean you're either changing what's in the data source between when you first set it and when you scroll, or you're setting values at the wrong point in time (i.e setting values on row 5 but then loading row 6 from a nib, or setting values on a row but then loading the nib for it afterwards so the values you set are overridden). Also, I'm a bit concerned that you set local variables rather than, say, (PlayerTransfers*)cell.seasonYear.text = tempTransferRecord.seasonYear or (UILabel *)[cell viewWithTag:1].text = tempTransferRecord.seasonYear. Shouldn't you be setting the values within each cell rather than on your table view class? That could explain why values are changing to something different: you may use the same variables to set every cell.
Have you set a CellIdentifier in Interface Builder?
how to make a UIView added to UITableViewCell content view fit within its bounds?
That is, I have created a single NIB file (with 3 labels on it), and want to use this for the display of each cell in a UITableView. I'm adding in the cellForRowAtIndexPath method the custom NIB based view to the cell's content view, however all I see as an end result is one (1) custom NIB based view (not multiple within a tableview as I expected).
How do I arrange so that each custom view fits neatly within each UITableViewCell? Also note the labels within the custom NIB view have word wrap.
Do I have to create a frame for the custom NIB view, but then in that case I'm not exactly sure how to set the co-ordinates. Would it be relative to the UITableViewCell? and if the custom view height can change due to it's UILabel word wrap, then I assume I separately have to manually calculate this height in the UITableView? (perhaps I should go to dynamic/custom view creation and drop the concept of using InterfaceBuilder/NIB)
- (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] autorelease];
}
UIView *detailedView = [[[NSBundle mainBundle] loadNibNamed:#"DetailedAppointView" owner:self options:nil] objectAtIndex:0];
[cell.contentView addSubview:detailedView]; // DOESN'T SEE TO WORK
return cell;
}
This is how I do it if I need to implement a custom UITableViewCell.
I create a subclass of UITableViewCell for my custom cell ex. "MyCustomCell". Then I create a NIB file for it, and within this NIB file I insert UITableViewCell and change it's type to "MyCustomCell" and I give it an identifier with the same name as the class name. Then I insert all my subviews onto my cell. All in IB.
After I got my cell pimped out to my likning :-) I use it in the following way:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"MyCustomCell";
static NSString *CellNib = #"MyCustomCell";
MyCustomCell *cell = (MyCustomCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:CellNib owner:self options:nil];
cell = (MyCustomCell *)[nib objectAtIndex:0];
}
//Manipulate your custom cell here
return cell;
}
I am trying to add a custom view control to a custom UITableViewCell which I had designed in the interface builder.
Now, to load UITableCellView I am using
NSArray * loadedViews = [[NSBundle mainBundle] loadNibNamed:#"CustomSearchResultsCell" owner:self options:nil];
What method of the CustomSearchResultsCell class will be called the Nib loads the view and initializes it. I tried using viewDidLoad, but UITableViewCell does not respond to this method. Also initWithStyle is not being called in this case.
TIA
Nitin
Views loaded from a nib are initialized with initWithCoder:, which you can implement in a similar way like initWithFrame:.
Also, take a look at Apple' Sample Code called AdvancedTableViewCells. In this example they use following code to load table view cell from XIB:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"ApplicationCell";
ApplicationCell *cell = (ApplicationCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
[[NSBundle mainBundle] loadNibNamed:#"IndividualSubviewsBasedApplicationCell" owner:self options:nil];
cell = tmpCell;
self.tmpCell = nil;
}
return cell;
}