custom tableview cell is not refreshing - iphone

Question

This is my custom table view cell, I want to change those values in every 1 minute (values will load from server). I have already set an Nstimer and tried to reload the tableview. Data in my array is changing fine, but value in the uitableviewcell is not changing.
Code:
Tableviewcontroller.m
-(void) loadView
{
parsejson = [ParseJson alloc];
defaults=[NSUserDefaults standardUserDefaults];
items=[NSArray arrayWithObjects:#" data1",#" data2 ", nil];
usercount=[NSArray arrayWithObjects:
[parsejson getdata:[defaults valueForKey:#"userid"]],#" 0 ", nil];
listtimer = [NSTimer scheduledTimerWithTimeInterval:60.0 // start timer ( interval 2 secs )
target:self
selector:#selector(reloadlist:)
userInfo:nil
repeats:YES];
}
- (void)reloadlist:(NSTimer*)timer
{
NSLog(#"list reload " );
items=[NSArray arrayWithObjects:#" data1",#" data2 ", nil];
usercount=[NSArray arrayWithObjects:
[parsejson getdata:[defaults valueForKey:#"userid"]],#" 0 ", nil];
//UITableView *tv = (UITableView *)self.view;
[self.tableview reloadData];
// NSIndexPath *a = [NSIndexPath indexPathForRow:0 inSection:0]; // I wanted to update this cell specifically
// NearestListCell *c = (NearestListCell *)[tv cellForRowAtIndexPath:a];
//c.count=[usercount objectAtIndex:0];
//[tv beginUpdates];
//// [tv reloadRowsAtIndexPaths:usercount withRowAnimation:UITableViewRowAnimationRight];
//[tv endUpdates];
// [tv reloadData];
}
#pragma mark - Table view data source
- (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 [usercount count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"NearmeListIdentifier";
listCell *cell = (listCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"listCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.text.text = [items objectAtIndex:indexPath.row];
cell.data11.text = [usercount objectAtIndex:indexPath.row];
cell.data22.text = #" 0.0 ";
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:#"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
#end
Viewcontroller.h
#interface Viewcontroller : UIViewController
{
Tableviewcontroller *Tablecontroller;
IBOutlet UITableView *myTable;
}
#end
Viewcontroller.m
-(void)viewDidLoad
{
[super viewDidLoad];
defaults = [NSUserDefaults standardUserDefaults];
if (Tablecontroller == nil)
{
Tablecontroller = [[Tableviewcontroller alloc] init];
}
[myTable setDataSource:Tablecontroller];
[myTable setDelegate:Tablecontroller];
Tablecontroller.view = Tablecontroller.tableView;
}

Answer 1

Please try this code : its working fine here
/* FirstTVContoller.h */
#import <Foundation/Foundation.h>
#interface FirstTVContoller : UITableViewController <UITableViewDataSource, UITableViewDelegate>{
NSMutableArray *items;
}
#end
/* FirstTVContoller.m */
#import "FirstTVContoller.h"
#import "SecondTVController.h"
#implementation FirstTVContoller
-(void) loadView
{
if (items == nil) {
items = [[NSMutableArray arrayWithObjects:#"1",#"2",#"3",#"4",#"5",#"6",#"6",#"8",#"9",#"10",#"11",#"12",#"13",#"14",#"15",#"16",#"17",nil] retain];
}
}
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger) tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section
{
return [items count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"MyIdentifier"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewStylePlain reuseIdentifier:#"MyIdentifier"];
}
cell.textLabel.text = [NSString stringWithFormat:#"1.%#" ,[items objectAtIndex:indexPath.row]];
return cell;
}
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {
return UITableViewCellEditingStyleDelete;
}
- (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath {
if(editingStyle == UITableViewCellEditingStyleDelete) {
//Delete the object from the table.
[items removeObjectAtIndex:indexPath.row];
[tv deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade];
}
}
-(void) dealloc
{
[items release];
[super dealloc];
}
#end
/* SecondTVController.h */
#import <Foundation/Foundation.h>
#interface SecondTVController : UITableViewController <UITableViewDataSource, UITableViewDelegate>{
int numberOfCells;
}
#end
/* SecondTVController.m */
#import "SecondTVController.h"
#implementation SecondTVController
-(void) viewDidLoad
{
numberOfCells = 20;
}
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
-(NSInteger) tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section
{
return numberOfCells;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"MyIdentifier"];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellSelectionStyleNone reuseIdentifier:#"MyIdentifier"];
}
cell.textLabel.text = [NSString stringWithFormat:#"2.%d", indexPath.row];
return cell;
}
-(void) tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
}
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath {
return UITableViewCellEditingStyleDelete;
}
- (void)tableView:(UITableView *)tv commitEditingStyle:(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath *)indexPath {
if(editingStyle == UITableViewCellEditingStyleDelete) {
//Delete the object from the table.
numberOfCells -=1;
[tv deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationRight];
}
}
#end
/* TwoTableViewsViewController.h */
#import <UIKit/UIKit.h>
#import "FirstTVContoller.h"
#import "SecondTVController.h"
#interface TwoTableViewsViewController : UIViewController{
FirstTVContoller *firstController;
SecondTVController *secondController;
IBOutlet UITableView *firstTable;
IBOutlet UITableView *secondTable;
}
#end
/* TwoTableViewsViewController.m */
#import "TwoTableViewsViewController.h"
#implementation TwoTableViewsViewController
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
[super viewDidLoad];
if (firstController == nil) {
firstController = [[FirstTVContoller alloc] init];
}
if (secondController == nil) {
secondController = [[SecondTVController alloc] init];
}
[firstTable setDataSource:firstController];
[secondTable setDataSource:secondController];
[firstTable setDelegate:firstController];
[secondTable setDelegate:secondController];
firstController.view = firstController.tableView;
secondController.view = secondController.tableView;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (void)dealloc {
[firstController release];
[secondController release];
[firstTable release];
[secondTable release];
[super dealloc];
}
Let me know if you still face any problems. This will work for sure for n-no. of UITableViews.

Answer 2

ViewController.h
#import <UIKit/UIKit.h>
#interface ViewController : UITableViewController
#end
ViewController.m
#import "ViewController1.h"
#implementation ViewController
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [usercount count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"NearmeListIdentifier";
listCell *cell = (listCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"listCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.text.text = [items objectAtIndex:indexPath.row];
cell.data11.text = [usercount objectAtIndex:indexPath.row];
cell.data22.text = #" 0.0 ";
return cell;
}
- (void)reloadlist:(NSTimer*)timer
{
NSLog(#"list reload " );
items=[NSArray arrayWithObjects:#" data1",#" data2 ", nil];
usercount=[NSArray arrayWithObjects:
[parsejson getdata:[defaults valueForKey:#"userid"]],#" 0 ", nil];
[self.tableView reloadData];
}
-(void) loadView
{
parsejson = [ParseJson alloc];
defaults=[NSUserDefaults standardUserDefaults];
items=[NSArray arrayWithObjects:#" data1",#" data2 ", nil];
usercount=[NSArray arrayWithObjects:
[parsejson getdata:[defaults valueForKey:#"userid"]],#" 0 ", nil];
listtimer = [NSTimer scheduledTimerWithTimeInterval:60.0 // start timer ( interval 2 secs )
target:self
selector:#selector(reloadlist:)
userInfo:nil
repeats:YES];
}
Please try this code and let me know if you face any problems.Thanks

Answer 3

Why don't you try
[self.tableView reloadData];
instead of
UITableView *tv = (UITableView *)self.view;
[tv reloadData];
Only if your super class is UITableViewController.If not then make an outlet for tableView and reload table through it.
have you used this 'setNeedsDisplay' as
[cell.data11 setNeedsDisplay] if cellForRow is calling.

Answer 4

Please change below code :
/* TwoTableViewsViewController.m */
- (void)viewDidLoad {
[super viewDidLoad];
if (firstController == nil) {
firstController = [[FirstTVContoller alloc] init];
}
if (secondController == nil) {
secondController = [[SecondTVController alloc] init];
}
[firstTable setDataSource:firstController];
[secondTable setDataSource:secondController];
[firstTable setDelegate:firstController];
[secondTable setDelegate:secondController];
firstController.view = firstController.tableView;
secondController.view = secondController.tableView;
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(reloadData:) name:#"ReloadFirstTable" object:nil];
}
-(void)reloadData:(id)sender
{
[firstTable reloadData];
}
/* FirstTVContoller.m */
- (void)reloadlist:(NSTimer*)timer
{
NSLog(#"list reload " );
self.items = [NSMutableArray arrayWithObjects:#"data1",#" data2 ", nil];
[[NSNotificationCenter defaultCenter] postNotificationName:#"ReloadFirstTable" object:nil];
}
Please use NSNotificationCenter to reload Data.

Answer 5

I fixed the issue. Forgot to reload UITableview object in viewcontroller. I removed the NStimer from Tableviewcontroller.m and placed it in the Viewcontroller.m.
The changed code:
TableViewController.m
-(void) loadView
{
parsejson = [ParseJson alloc];
defaults=[NSUserDefaults standardUserDefaults];
items=[NSArray arrayWithObjects:#" data1",#" data2 ", nil];
usercount=[NSArray arrayWithObjects:
[parsejson getdata:[defaults valueForKey:#"userid"]],#" 0 ", nil];
**// removed the nstimer from here.**
}
#pragma mark - Table view data source
- (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 [usercount count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
// Added these 2 lines of code here.
items=[NSArray arrayWithObjects:#" data1",#" data2 ", nil];
usercount=[NSArray arrayWithObjects:[parsejson getNearestUsercount:[defaults valueForKey:#"userid"]],#" 0 ", nil];
static NSString *CellIdentifier = #"NearmeListIdentifier";
listCell *cell = (listCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"listCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.text.text = [items objectAtIndex:indexPath.row];
cell.data11.text = [usercount objectAtIndex:indexPath.row];
cell.data22.text = #" 0.0 ";
return cell;
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
// Navigation logic may go here. Create and push another view controller.
/*
<#DetailViewController#> *detailViewController = [[<#DetailViewController#> alloc] initWithNibName:#"<#Nib name#>" bundle:nil];
// ...
// Pass the selected object to the new view controller.
[self.navigationController pushViewController:detailViewController animated:YES];
*/
}
#end
Viewcontroller.m
-(void)viewDidLoad
{
[super viewDidLoad];
defaults = [NSUserDefaults standardUserDefaults];
if (Tablecontroller == nil)
{
Tablecontroller = [[Tableviewcontroller alloc] init];
}
[myTable setDataSource:Tablecontroller];
[myTable setDelegate:Tablecontroller];
Tablecontroller.view = Tablecontroller.tableView;
// I Put the Nstimer here.
aTimer = [NSTimer scheduledTimerWithTimeInterval:2.0 // start timer ( interval 2 secs )
target:self
selector:#selector(timerTicked:)
userInfo:nil
repeats:YES];
}
- (void)timerTicked:(NSTimer*)timer
{
[myTable.self reloadData];
}
Thank You all for helping me.