I really can't understand why i get a "EXC_BAD_ACCESS" in the line where I assign NSArray *topLevelObjects. It's crazy because I use exactly the same code and the same BlogCell in another tabliView, and there it's working perfectly!
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
int r = indexPath.row;
static NSString *CellIdentifier = #"Blog";
BlogCell *cell = (BlogCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"BlogCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
return cell;
}
Make sure all the outlets you specify in BlogCell to FilesOwner have corresponding IBOutlets in this class.
Related
While I realise this is a popular problem among developers and there are many similar questions on Stack Overflow, none have been able to help me resolve this. There is a strange issue with a UITableView in which the individual cells are becoming mixed up, or seemingly mixed up. I believe I am reusing cells correctly and simply need a second set of eyes. Here is my code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleTableCell";
SimpleTableCell *cell = (SimpleTableCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"SimpleTableCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.friendFullName.text = [users objectAtIndex:indexPath.row];
return cell;
}
I am using dynamic, custom cells in a seperate UITableCell.
You cell is being reused. Set your label in willDisplayCell instead of cellForRowAtIndexPath.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleTableCell";
SimpleTableCell *cell = (SimpleTableCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"SimpleTableCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
return cell;
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
SimpleTableCell *simpleTableCell = (SimpleTableCell *)cell;
simpleTableCell.friendFullName.text = [users objectAtIndex:indexPath.row];
}
I'm getting an error in the below code. ..L1name , L1email , L1code are the property names for the array nameData, nameEmail, nameCode.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleTableCell";
SimpleList1 *cell = (SimpleList1 *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"SimpleTableCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.L1name.text = [nameData objectAtIndex:indexPath.row];
cell.L1email.text = [nameEmail objectAtIndex:indexPath.row];
cell.L1code.text = [nameCode objectAtIndex:indexPath.row];
return cell;
}
I guess there is a typo in your question title and the error is actually referencing UITableViewCell. This would be because UITableViewCell doesn't have your custom properties.
You need to ensure you have created an instance of your custom cell subclass, and that the variable is of the correct class type so the compiler knows what properties are available (casting if required):
MYCell *cell = (MYCell *)[tableView dequeueReusableCellWithIdentifier:...];
I have a custom UITableViewCell that's loaded from a nib. I can pull this into my app with a reuseIdentifier by performing the following steps:
1) Set the reuse identifier in the Nib as "CustomCellIndentifier"
2) Register the nib:
[[self tableView] registerNib:[UINib nibWithNibName:#"CustomCell" bundle:nil] forCellReuseIdentifier:#"CustomCellIndentifier"];
3) Return the cell in tableview:cellForRowAtIndexPath
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:#"CustomCellIndentifier"];
return cell;
}
My question is, how can I return a cell WITHOUT a reuse identifier? I have a small table and I don't want the cell to be reused (it messes up some subviews I have in the cell if I scroll).
I've tried a combination of setting the above 3 reuse identifiers to nil and they all generate errors.
I've also tried this below, but the cell contents reset if I scroll past the cell and I get an error message "no index path for table cell being reused":
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCell *cell = [tableView dequeueReusableCellWithIdentifier:nil];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
return cell;
}
I think this is not a good way, but as per your requirement Use this:
Write the init method in your CustomCell class
- (id)init
NSArray *nibObjects = [[NSBundle mainBundle] loadNibNamed:#"QuestionOptionCell" owner:self options:nil];
CustomCell *theEditView = [nibObjects objectAtIndex:0];
self = theEditView;
theEditView = nil;
return self
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
CustomCell *cell = [[CustomCell alloc] init];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"CustomCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
return cell;
}
I would like to know where to enter custom code to change the value of a Label property for a UITableViewCell.
I am not sure how this is loaded, as I have put an NSLog in the ViewDidLoad and (id)initWithStyle instance methods but neither write to the log.
I have setup a NIB and custom class all correctly linked, and the Label is linked as a property and no longer causes an error. But I am unable to setText.
This is how the custom cell is called:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
LeftMenuTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray* views = [[NSBundle mainBundle] loadNibNamed:#"LeftMenuTableViewCell" owner:nil options:nil];
for (UIView *view in views) {
if([view isKindOfClass:[UITableViewCell class]])
{
cell = (LeftMenuTableViewCell*)view;
}
}
}
return cell;
}
This is the code in the IMP file for the LeftMenuViewCell class.
-(void)viewDidLoad {
displayName.text = [self.user objectForKey:#"displayName"];
I can set the displayName to a string and this does not change either. If I add an NSLog to the viewDidLoad for the custom cell class it is not shown, like it is not loaded, but the cell is loaded...?
Without code specifics, I can only give a vague'ish answer.
Your custom cell will need to subclass UITableViewCell, and you need to provide your table with this custom subclass when the data source method tableView:cellForRowAtIndexPath:.
I'd suggest reading up on how cells are added/used with UITableViews:
http://developer.apple.com/library/ios/#documentation/UserExperience/Conceptual/TableView_iPhone/TableViewCells/TableViewCells.html#//apple_ref/doc/uid/TP40007451-CH7-SW1
Let's say that you have custom UITableViewCell with UILabel called testLabel. If your NIB and custom class are properly linked than you can use following code:
MyTableViewCell.h
#interface MyTableViewCell : UITableViewCell
#property (nonatomic, assign) IBOutlet UILabel *testLabel;
#end
cellForRowAtIndexPath in your UITableViewController or UIViewController:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"MyTableViewCellId";
MyTableViewCell *cell = (MyTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"MyTableViewCell" owner:self options:nil];
cell = [topLevelObjects objectAtIndex:0];
}
[cell.testLabel.text = [_dataSource objectAtIndex:[indexPath row]]];
return cell;
}
Hope it helps :)
For example
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
RouteCell *routeCell = [self.tableView dequeueReusableCellWithIdentifier:routeIdentifier];
if (routeCell == nil) {
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"RouteCell" owner:nil options:nil];
routeCell = [nib objectAtIndex:0];
}
routeCell.travelTime.text = #"Here you are setting text to your label";
return routeCell;
When I run my ios app, only the first cell displays in the TableView, then when clicked the second cell displays. I would like them both to display at the same time, but I cannot figure out this behavior.
Here is the code for my view did load
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"ProductCellId";
ProductTableCell *cell =
(ProductTableCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
[[NSBundle mainBundle] loadNibNamed:#"ProductTableCell" owner:self options:nil];
cell = self.productCell;
}
Product *product = [products objectAtIndex:indexPath.row];
[cell configureForProduct:product];
return cell;
}
Any help would be much appreciated!
Since you are loading your cell from Interface builder try this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"ProductTableCell"];
if (cell == nil) {
// Load the top-level objects from the custom cell XIB.
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"ProductTableCell" owner:self options:nil];
// Grab a pointer to the first object (presumably the custom cell, as that's all the XIB should contain).
cell = [topLevelObjects objectAtIndex:0];
}
Product *product = [products objectAtIndex:indexPath.row];
[cell configureForProduct:product];
return cell;
}
Change this:
static NSString *CellIdentifier = #"ProductCellId";
to:
static NSString *CellIdentifier = #"ProductTableCell";
You can find additional information for what you are trying to do in this question: Load cells from XIB files