I have a UIButton called as UploadButton. I am using the following lines of code which takes care of the action which should happen on clicking it ::
-(IBAction)UploadButtonPressed:(id)sender{
self.Upload = [[UploadSpaceTableViewController alloc]
initWithStyle:UITableViewStylePlain];
self.UploadTableViewPopover = [[UIPopoverController alloc]
initWithContentViewController:Upload];
[self.UploadTableViewPopover presentPopoverFromBarButtonItem:sender
permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES];
}
Here, UploadSpaceTableViewController is a separate class which I have made. It has the following functions in it ::
- (void)viewDidLoad
{
[super viewDidLoad];
self.clearsSelectionOnViewWillAppear = NO;
self.contentSizeForViewInPopover = CGSizeMake(150.0, 140.0);
self.keys1 = [NSMutableArray array];
[keys1 addObject:#"Red"];
[keys1 addObject:#"Green"];
[keys1 addObject:#"Blue"];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return [keys1 count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
NSString *key1 = [keys1 objectAtIndex:indexPath.row];
cell.textLabel.text = key1;
return cell;
}
Basically, all I want is to display a UItableView inside a UIPopOverController on the click of my UploadButton.
However, on running the above lines of code I am getting the following erre in gdb ::
splitView[4486:f803] *** Assertion failure in -[UITableView _createPreparedCellForGlobalRow:withIndexPath:], /SourceCache/UIKit_Sim/UIKit-1914.84/UITableView.m:6061
2012-06-27 14:05:05.531 splitView[4486:f803] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath:
This is the first time that I am trying to display a UITableView inside a UIPopoverController. I have tried a lot of variations in the code but, I am unable to sort it out. Can someone help me out ?? Thanks and regards.
Have you allocated your cell i think by your code it will return nill
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell == nill){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
// Configure the cell...
NSString *key1 = [keys1 objectAtIndex:indexPath.row];
cell.textLabel.text = key1;
return cell;
}
may this will help you...
That error means that you're passing an invalid argument when you're assigning a value to keys1, self.keys1 = .... If you're, e.g., passing a NSMutableArray to an NSDictionary property, you'll get that error.
The problem is the following line:
self.keys1 = [NSMutableArray array];
Your UploadSpaceTableViewController has no method setKeys / no property keys.
Edit for the 2nd error message:
UITableView dataSource must return a cell from
tableView:cellForRowAtIndexPath:
This means that you should implement the UITableViewDataSource method tableView:cellForRowAtIndexPath:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
//configure your cell here
return myCongiuredTableViewCell;
}
Use the following code in cellForRowAtIndexPath:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
if( cell == nil )
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSString *key1 = [keys1 objectAtIndex:indexPath.row];
cell.textLabel.text = key1;
return cell;
}
I think this may helpful for you.
Related
I have a problem in my storyboard.It is working fine but when i try to change the content property of UITableView it caused following error
Assertion failure in -[UITableView dequeueReusableCellWithIdentifier:forIndexPath:], /SourceCache/UIKit/UIKit-2903.23/UITableView.m
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'unable to dequeue a cell with identifier Cell - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'
I want to design a grouped tableview with static cell.Thanks in advance
Code
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
return cell;
}
if you use static cell, just comment all the UITableViewDatasourceDelegate method. so comment the following code:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 2;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 3;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
return cell;
}
Wish this will help you!
Instead of using:
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
//-> This is used when using prototype cells (e.g) Dynamic TableView
Use:
UITableViewCell *cell = [super tableView:tableView
cellForRowAtIndexPath:indexPath];
//-> Since you chose Static TableCells you don't need to reuse instead use the cells you created in nib
I have encountered same issue, and I think I found the way to work this out.
Create a Controller extends from UITableViewController to wrap its controller, it will have default UITableViewDelegate and UITableViewDataSource methods.
Remove UITableView delegate and datasource
Delete default UITableViewDelegate and UITableViewDataSource methods from your controller file, coz it's static cells, so if these exist, will not appear
Hope it helps.
When using storyboard the tableview cell must be registered in the storyboard.That means cell must be added to the table and its identifier must be set.This identifier should be used in the code in cellForRowAtIndexpath
EDIT
In case of static cells the each purticular cells needed to be created in the nib and filled content via code or nib
Read this
Loading Table View Cells from a Storyboard
Excellent starter
You are not allowed to use static cells in a normal UITableView.
Instead you need to use UITableViewController to go with the static cells.
this and this may or might help.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [YourArr count];
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 44;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString *CellIdentifier = [NSString stringWithFormat:#"cell %d",indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
cell = nil;
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
}
return cell;
}
Add this code in cellForRowAtIndexPath
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
}
else
{
UIView *subview;
while ((subview= [[[cell contentView]subviews]lastObject])!=nil)
[subview removeFromSuperview];
}
I have tableview with search result controller when search in search bar get this error indicate that there is no cell and get the below error .How can create my prototype cell in this method CellForRowAtIndexPath
Code :
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"HoCell";
Ho *cell;
Ho *item;
if (tableView == self.searchDisplayController.searchResultsTableView) {
if (cell == nil)
{
cell = [[Ho alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:#"HoCell"];
}
item = [searchResultsController objectAtIndexPath:indexPath];
}
else{
cell = (Ho*)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
item = [fetchedResultsController objectAtIndexPath:indexPath];
}
cell.ho.text = item.name;
cell.selectedBackgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"se.png"]];
return cell;
}
Error :
*** Assertion failure in -[UISearchResultsTableView _configureCellForDisplay:forIndexPath:], /SourceCache/UIKit_Sim/UIKit-2372/UITableView.m:5471
Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath:'
There may be two possibilities Here :
1) You are returning a number larger than your Array Count from
tableView:numberOfRowsInSection:. Don't.
2) One or more of your cell# outlets is not hooked up in your nib, or
is not hooked up to a UITableViewCell (or subclass). Hook them up
properly.
Go through this Ray Wenderlich's Link :
How to Add Search Into a Table View
Check this SO Questions :
1) UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath: Exception
2) ios 5 UISearchDisplayController crash
One More Beautiful Link : Custom Prototype Table Cells and Storyboards Just see this Portion :
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:UYLCountryCellIdentifier];
if (cell == nil)
{
[self.countryCellNib instantiateWithOwner:self options:nil];
cell = self.countryCell;
self.countryCell = nil;
}
// Code omitted to configure the cell...
return cell;
}
Your code seems to be buggy. You check for cell == nil while it is not set to nil initially. It also looks a bit strange that you allocate your cells in that way based on search mode.
Anyways, I would do it different way. Imho the way I do it is almost canonical :) Just use your search result to populate your cells with correct data for each case (search mode and normal mode). In this example, searchResult and dataSource are arrays with strings. I think in real life for you it will be something more complex like array of nsdictionary.
In your view controller:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)_section
{
/* Use correct data array so that in search mode we draw cells correctly. */
NSMutableArray *data = searching ? searchResult : dataSource;
return [data count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
/* Use correct data array so that in search mode we draw cells correctly. */
NSMutableArray *data = searching ? searchResult : dataSource;
static NSString *CellIdentifier = #"CellId";
CustomTableViewCell *cell = (CustomTableViewCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[CustomTableViewCell alloc] initWithIdentifier:CellIdentifier] autorelease];
}
/* Note this is only correct for the case that you have one section */
NSString *text = [data objectAtIndex:[indexPath row]]
cell.textLabel.text = text;
/* More setup for the cell. */
return text;
}
And here are delegate methods for search controller and some helpers:
- (void) searchTableView
{
NSString *searchText = searchBar.text;
for (NSString *item in dataSource) {
NSRange range = [item rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (range.length > 0) {
[searchResult addObject:item];
}
}
}
- (void)searchDisplayControllerWillBeginSearch:(UISearchDisplayController *)controller
{
searching = NO;
}
- (void)searchDisplayControllerWillEndSearch:(UISearchDisplayController *)controller
{
searching = NO;
[self.tableView reloadSections:[NSIndexSet indexSetWithIndex:0]
withRowAnimation:UITableViewRowAnimationAutomatic];
[searchResult removeAllObjects];
}
- (BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchText
{
[searchResult removeAllObjects];
if ([searchText length] > 0) {
searching = YES;
[self searchTableView];
} else {
searching = NO;
}
return YES;
}
Hope this helps.
I have the same issue, here is what is did and it is now working perfectly..
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Here is my code BEFORE
//
OPUsersTableViewCell *tableCell = [tableView dequeueReusableCellWithIdentifier:TableCellID];
// Here is my code AFTER
//
OPUsersTableViewCell *tableCell = [self.groupTableView dequeueReusableCellWithIdentifier:TableCellID];
Note:
self.groupTableView is where the prototype cell is...
I am relatively new to using table view in ios. I am trying to edit data using different view and update the values from original view. I set cell identifier and wrote following code.
#pragma mark - Table view data source
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return self.items.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"NameIdentifier";
Item *currentItem=[self.items objectAtIndex:indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
// Configure the cell...
cell.textLabel.text=currentItem.itemName;
return cell;
}
But I get the following error:
NSInternalInconsistencyException',
reason: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath:'
You need to check and make sure dequeueReusableCellWithIdentifier was able to dequeue a cell. It's crashing because it doesn't return a cell every time. If you were unable to dequeue a reusable cell you need to create a new one. Your code should look like this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"NameIdentifier";
Item *currentItem=[self.items objectAtIndex:indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
cell = [[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier];
// Configure the cell...
cell.textLabel.text=currentItem.itemName;
return cell;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// ...
PlanetTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"PlanetCell_ID"];
return cell;
}
If your creating a custom UITableViewCell (in this case PlanetTableViewCell) is it acceptable to return that object via a method returning (UITableViewCell *), or is there something else I should be doing?
If your creating a custom UITableViewCell (in this case PlanetTableViewCell) is it acceptable to return that object via a method returning (UITableView *), or is there something else I should be doing?
You possibly meant:
to return that object via a method returning (UITableViewCell*),
If so, then it is perfectly legal and reasonable.
Indeed, your PlanetTableViewCell being derived from UITableViewCell, all instances of PlanetTableViewCell are also of the type UITableViewCell (is-a relationship in OOP).
Yes, this is the correct way to return the cell.
But you should also be checking to see if your "dequeue" is returning a valid cell object. If not, you'll need to create one.
This method is also where you should be configuring your cell with title, accessories, etc.
Sample code:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
// ...
PlanetTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"PlanetCell_ID"];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
cell.titleLabel.text = #"Cell Title";
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
Using custom cell
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier;
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad)
{
simpleTableIdentifier = #"dashboard_logintimeCell_ipad";
}
else
{
simpleTableIdentifier = #"dashboard_logintimeCell";
}
dashboard_logintimeCell *cell = (dashboard_logintimeCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib =[[NSBundle mainBundle]loadNibNamed:simpleTableIdentifier owner:self options:nil];
cell = [nib objectAtIndex:0];
}
/*here you cell object get
like
cell.lable.text=#"yourlabeltext";
*/
cell.backgroundColor=[UIColor clearColor];
return cell;
}
Can anyone tell me that how to remove all rows of a tableView
Clear the datasource (for example [dataSourceMutableArray removeAllObjects]) and reload the table ([tableView reloadData])
I think you can remove all values in dataSource of tableView? Then reload the tableView
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 0;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 0;
}
or specify return nil; instead of return cell; in cellForRowAtIndextPath function
or you can remove all values in array in cellForRowAtIndexPath like this
- (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];
}
// Configure the cell.
// remove below line
//cell.textlabel.text=[array objectAtIndex:indextPath];
return cell;
}