Right now I have a tableview, and I can assure you that the delegate method all work. But I am trying to load the tableview from an array. the same array returns actual objects when i log then earlier in the app, but when I try to access the same array in - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
it always returns nil/null.Here is the implementation of - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath:
NSLog(#"cell for row at twitter called");
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
NSDictionary *tweet = [timeLineData objectAtIndex:indexPath.row];
// NSLog(#"Tweet at index %d is %#", [indexPath row], tweet);
//NSLog(#"Tweet: %#", tweet);
cell.textLabel.text = [tweet objectForKey:#"text"];
cell.detailTextLabel.text = [tweet valueForKeyPath:#"user.name"];
return cell;
I am so confused as to why this is, because in all of my other projects the same code works just fine. Any help would be greatly appreciated.
Thanks,
Virindh Borra
Would it help if you access the array using:
[yourArray objectAtIndex:indexpath.row];
Related
Table is showing the list of countries. But when i tried to retrieve the data its returning null value. I am trying store the cell.textlabel.text into a string but worrying with null
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier:#"MyCell"];
if (cell==nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"CellIdentifier"];
}
jsonDict = [newarray objectAtIndex:indexPath.row];
cell.textLabel.text = [jsonDict objectForKey:#"countryName"];
return cell;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
NSLog(#"country is %#",cell.textLabel.text);
cell.textLabel.text=CountryString;
}
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
jsonDict = [newarray objectAtIndex:indexPath.row];
CountryString=[jsonDict objectForKey:#"countryName"]
NSLog(#"country is %#", CountryString);
}
your cell identifier also different
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"cell"; //here mention the correct one use either `MyCell` or `CellIdentifier`
UITableViewCell *cell = (UITableViewCell *)[tableView dequeueReusableCellWithIdentifier: CellIdentifier];
if (cell==nil)
{
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier: CellIdentifier];
}
jsonDict = [newarray objectAtIndex:indexPath.row];
cell.textLabel.text = [jsonDict objectForKey:#"countryName"];
return cell;
}
I'm passing an array of favorites -- from a details view -- to (what should be) a table view displaying the favorites individually.
The first array [in the first view] is okay:
Array found. Contents: (
"\U5df4",
"\U5df4",
"\U82ad\U8305//\U5df4\U8305",
"\U5df4\U5bb6",
"\U7b06\U7bd3\U513f",
"\U5df4",
"\U5df4",
"\U5df4",
"\U5df4",
"\U5df4",
"\U5df4\U5bb6",
"\U5df4",
"\U5df4",
"\U5df4"
)
Number of items in my array is: 15
and printing it [from the second array in the second view]:
Printing description of self->FavsTwo:
<__NSCFArray 0x1f9644a0>(
巴,
巴,
芭茅//巴茅,
巴家,
笆篓儿,
巴,
巴,
巴,
巴,
巴,
巴家,
巴,
巴,
巴,
巴家
)
is also cool...
The first break i get is here:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [FavsTwo count];
}
and then all these errors:
*** Assertion failure in -[UITableView _configureCellForDisplay:forIndexPath:], /SourceCache/UIKit_Sim/UIKit-2903.2/UITableView.m:6235
*** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'UITableView dataSource must return a cell from tableView:cellForRowAtIndexPath:'
***
my cell looks like this:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
NSString *cellValue = [self.FavsTwo objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
return cell;
}
trying to convert objects to strings -- not really sure where it's failing
cheers
cellForRowAtIndexPath return nil, if can not ReusableCell, you should create a cell with theCellIdentifier
try this:
- (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];
}
NSString *cellValue = [self.FavsTwo objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
return cell;
}
You are missing self in the tableView:numberOfRowsInSection:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.FavsTwo count];
}
The dequeueReusableCellWithIdentifier: may return nil if it can not deque a cell.
You need to check if the cell is nil:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(!cell) {
cell = [UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]
}
NSString *cellValue = [self.FavsTwo objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
return cell;
}
If you have used registerClass:forCellReuseIdentifier: or registerNib:forCellReuseIdentifier:.The you need to get the cell with dequeueReusableCellWithIdentifier:forIndexPath::
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
NSString *cellValue = [self.FavsTwo objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
return cell;
}
I am having trouble inputting my string "handle" into a group UITableView that I have;
for(NSDictionary * dataDict in servers) {
NSString * handle [dataDict objectForKey:#"handle"];
}
I'm totally confused on how I could utilize this for statement to dynamically create new cells with the handle.
The actual UITableView is on the main view controller and doesn't have any cells. How can I loop through the values and create the cells with labels?
You've to overrite this datasource methods for your UITableView, don't forget to set datasource for the table. Just reload your data once you fill your server array, [table reloadData];
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return servers.count; //will create cell based on your 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:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
//show handle stirng from server array
cell.textlabel.text = [[server objectAtIndex:indexPath.row]objectForKey:#"handle"];
return cell;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [arrData count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleTableCell";
mycustomcell *cell = (mycustomcell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"mycustomcell" owner:self options:nil];
cell = [nib objectAtIndex:0];
NSLog( #"NIB = %#",nib);
NSLog( #"Cell = %#",cell);
}
cell.lblName.text = [[arrData objectAtIndex:indexPath.row] objectForKey:#"Name"];
cell.lblId.text = [[arrData objectAtIndex:indexPath.row] objectForKey:#"Id"];
cell.lblGender.text = [[arrData objectAtIndex:indexPath.row] objectForKey:#"Gender"];
cell.lblAddress.text = [[arrData objectAtIndex:indexPath.row] objectForKey:#"Address"];
cell.lblPhone.text = [[arrData objectAtIndex:indexPath.row] objectForKey:#"Phone"];
cell.lblEmail.text = [[arrData objectAtIndex:indexPath.row] objectForKey:#"Email"];
NSLog(#"tbl %#",cell.lblName.text);
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return 200;
}
here mycustomcell is Custome cell not tableview's cell... I hope this works for you.. Create new custome cell with named mycustomecell with .h , .m and .xib..
You should use the method below available on UITableViewDataSource protocol.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
I would like to populate a tableview with a NSMutableData that received from a webservice. I can get the data and display at several components but cannot fill the tableview because following code doesn't accept NSMutableData ;
AnyNSarray = [NSPropertyListSerialization propertyListWithData: webData options: 0 format:&plf error: &error];
//webData is NSMutableData that i populate with webservice data and AnyNSarray is a NSArray to provide tableview at
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
Here is tableview populating blocks (also following code works at view loads but is not fired again after i click button):
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = [NSString stringWithFormat:#"cell%i",indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
cell.textLabel.text = [birnsarray objectAtIndex:indexPath.row];
cell.detailTextLabel.text = #"any details";
}
return cell;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return AnyNSarray.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [birnsarray count];
}
Hey in numberOfRows function you are returning AnyNSarray count, so replace your cellForRowAtIndexPath with the below code.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *CellIdentifier = [NSString stringWithFormat:#"cell%i",indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
cell.textLabel.text = [AnyNSarray objectAtIndex:indexPath.row];
cell.detailTextLabel.text = #"any details";
}
return cell;
}
I Have an NSMutableArray which is being displayed as
(
13002,
My Drive,
13006,
Testing1,
13007,
Testing123
)
In my NSLog
I want to populate my UITableView with just the names (My Drive, Testing1 & Testing123) and want to use the ID's as the subtitle.
use cell for row at indexpath method and number of rows method as below
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return array.count/2;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
int row = [indexPath row]*2;
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier] autorelease];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.font = [UIFont boldSystemFontOfSize:14];
}
cell.textLabel.text = [array objectAtIndex:row+1];
cell.detailTextLabel.text = [array objectAtIndex:row];
return cell;
}
your problem will solve...
NSmutableArray *element; //contains your array
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
static NSString *cellIdentifier = #"MyCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:cellIdentifier];
element = [array objectAtIndex:indexPath.row];
cell.textLabel.text = element;
element = [array objectAtIndex:indexPath.row +1 ];
cell.subtitle.text = element;
Depending on your application, you might want to consider using a NSMutableDictionary instead of the array. This way, your data model will accurately represent the fact that those names are mapped to ids. You can use
NSArray *arrayOf Keys = [theDictionary allKeys];
to get an array of the keys in your dictionary, then do something like this:
cell.textLabel.text = [theDictionary objectForKey:[arrayOfKeys objectAtIndex:indexPath.row]];
cell.detailtextLabel.text = [arrayOfKeys objectAtIndex:indexPath.row];
You should also consider using the free Sensible TableView framework. You would just pass the array to the framework and it will automatically display it in the table view.