display json datas table view in segmented control - ios

Question

friends,
i need to display list of details as in image in a table view datas from json service I tried the below code but it doesnot work out
(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"unrealized";
samplecell *cell = (samplecell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"unrealized" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
else if(mySegmentedcontrol.selectedSegmentIndex==3)
{
settings.hidden=YES;
connection.hidden=YES;
openTrades.hidden=YES;
closedTrades.hidden=NO;
NSString *link=[NSString stringWithFormat:#"http://www.dummydata.com/MMWS/Client/ClosedTrades.ashx?ClientId=%#",clientId];
NSURL *URLGet=[NSURL URLWithString:link];
NSData *data=[NSData dataWithContentsOfURL:URLGet];
NSError *error;
jsonReturnArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
NSLog(#"json%#",jsonReturnArray);
cell.unRealizedProfit.text=[[jsonReturnArray valueForKey:#"Profit"]objectAtIndex:0];
cell.strategy.text=[[jsonReturnArray valueForKey:#"StrategyName"]objectAtIndex:0];
NSString *totalProfit=[[jsonReturnArray valueForKey:#"TotalProfit"]objectAtIndex:0];
closedTotalUnrealizedProfit.text=totalProfit;
}
NSString *cellValue = [jsonReturnArray objectAtIndex:indexPath.row];
cell.unRealizedProfit.text=cellValue;
cell.unRealizedProfit.text = [jsonReturnArray valueForKey:#"Profit"];
cell.strategy.text =[jsonReturnArray valueForKey:#"StrategyName"];
return cell;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSLog(#"json%#",jsonReturnArray);
return jsonReturnArray.count;
}
I also tried the code and donot know how to bring tableview property in seegmented control
else if(mySegmentedcontrol.selectedSegmentIndex==3)
{
settings.hidden=YES;
connection.hidden=YES;
openTrades.hidden=YES;
closedTrades.hidden=NO;
strategyClosed.hidden=NO;
NSString *link=[NSString stringWithFormat:#"http://www.dummmydata.com/MMWS/Client/ClosedTrades.ashx?ClientId=%#",clientId];
NSURL *URLGet=[NSURL URLWithString:link];
NSData *data=[NSData dataWithContentsOfURL:URLGet];
NSError *error;
jsonReturnArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
NSLog(#"json%#",jsonReturnArray);
}

Answer 1

OK,
Your data source should not be get within the function cellForRowAtIndexPath, CellForRowAtIndexPath is for showing each cell of the row based on the tableView's dataSource. And apparently you should not get the datasource when each of the cell is rendering.
You should always make sure your tableView's dataSource is ready before you call [myTableView reloadData];
Solutions: in your viewDidAppear function block, write your logic as below
if(mySegmentedcontrol.selectedSegmentIndex==3){
NSString *link=[NSString stringWithFormat:#"http://www.dummydata.com/MMWS/Client/ClosedTrades.ashx?ClientId=%#",clientId];
NSURL *URLGet=[NSURL URLWithString:link];
NSData *data=[NSData dataWithContentsOfURL:URLGet];
NSError *error;
self.jsonDataSource = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
[self.thisTableView reloadData];
}
And then in your CellForRowAtIndexPath, do the normal thing like below
NSDictionary *objCellData = [self.jsonDataSource objectAtIndex:indexPath.row];
cell.cellData = objCellData;
return cell;
And then , in your Cell class, make sure you draw the title label, or value lable correctly by using the cellData it is assigned.
Please read the UITableView documentation before you code.
The UITableView rendering sequence is
DataSource is ready
Call [tableView reloadData];
UITableView dataSource/delegate functions will be fired, like numberOfRowsInSection, heightForRowAtIndexPath, cellForRowAtIndexPath, etc.

Answer 2

finally i got the answer i customized the cell and used below code for assigning number of rows depending on counts of array
(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return jsonReturnArray.count;
}
then i displayed in table view using below code
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"samplecell";
samplecell *cell = (samplecell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
//loads two table view for open and closed trades with reference of client id
if (cell == nil)
{
//table view for closed trades
if (tableView==strategyClosed)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"samplecell" owner:self options:nil];
cell = [nib objectAtIndex:0];
NSString *link=[NSString stringWithFormat:#"http://www.managedtradingsystems.com/MMWS/Client/ClosedTrades.ashx?ClientId=%#",clientId];
NSURL *URLGet=[NSURL URLWithString:link];
NSData *data=[NSData dataWithContentsOfURL:URLGet];
NSError *error;
jsonReturnArray = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingAllowFragments error:&error];
//checks whether datas are present in array or array and datas present are null and displays datas present through labels
if (![jsonReturnArray isEqual:[NSNull null]])
{
NSString *strategy=[[jsonReturnArray valueForKey:#"StrategyName"]objectAtIndex:indexPath.row];
if (![strategy isEqual:[NSNull null]])
{
cell.strategy.text=strategy;
}
else
{
cell.strategy.text=#"";
}
the number of rows by below code using array count
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return jsonReturnArray.count;
}