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;
}
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 had one table view in which I had 15 row in one section.
so when the table view get loaded it shows only first 9 rows, I checked it with method CellForRowAtIndexpath method but I want to get all 15 rows to be get called in this method for the viewload method.
please help me on out.
thanks in advance....
it depends how much rows you set from
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
if you have an array then return
[arr count]; as number of rows and if you want static rows then use return 15; in this method
You use these method or if you want all your cell on front of first time view then you should decrease the height of the cell using last method.And also check your array how much values he have.
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [Array count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc]
initWithStyle:UITableViewCellStyleSubtitle
reuseIdentifier:CellIdentifier]
autorelease];
}
cell.textLabel.text=[Array objectAtIndex:indexPath.row];
return cell;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 20;//use this method for cell height
}
I am working on an application and i have to show 10 records in table view one time then if user want to see more records then user will have to click on "see more records" cell, then user will be able to see more records.
If any one know about this then please give me solution.
Thanx
This is simple prototype of what you can do:
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
if ([self.tableData count]>window) {
return window+1;
}
else{
return [self.tableData count];
}
}
-(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];
}
if (indexPath.row<window) {
cell.textLabel.text=[self.tableData objectAtIndex:indexPath.row];
}
else{
cell.textLabel.text=#"LoadMore";
}
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
if (indexPath.row==window) {
window=window+step;
[tableView reloadData];
}
}
table data is an array that contains data that you want to show in tableview, window is number of lines to show initially and is used to set range of what to show, step is number of new items to add in every new load
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;
}
Apologies if this is a simple question but googling hasn't been able to help me.
I am planning to display 3 arrays of data in a Table View that has each array in a different section in the Table View.
Can any one provide me with a link to a good tutorial or sample code that could help me with this?
Once again I apologize if this is a simple question and answer but I am a newbie to Xcode and working on my first serious project for it.
Thanks!
In your TableViewController implement:
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 3;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [[self getDataArray:section]count];//implement getDataArray
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
NSObject *data = [[self getDataArray:indexPath.section]objectAt:indexPath.row];//implement getDataArray
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:CellIdentifier] autorelease];
//add Code to populate cell with data
}
return cell;
}
Other methods to probably implement:
- (UIView *)tableView: (UITableView *)tableView viewForHeaderInSection: (NSInteger)section
- (CGFloat)tableView:(UITableView *)aTableView heightForHeaderInSection:(NSInteger)section