My tableview's cell is not displayed - ios

Question

FirstPage.h
#import <UIKit/UIKit.h>
#import "StudentPage.h"
#interface FirstPage : UIViewController <UITableViewDelegate,UITableViewDataSource,StudentInfoDelegates>
#property (strong, nonatomic) IBOutlet UITableView *tableView;
- (IBAction)addButtonAction:(id)sender;
#end
FirstPage.m
#import "FirstPage.h"
#interface FirstPage ()
#end
#implementation FirstPage
{
NSMutableArray *firstPageArray;
}
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib
//[self performSegueWithIdentifier:#"StudentInfo" sender:sender];
/*StudentPage *student=[[StudentPage alloc]init];
student.delegates=self;*/
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//the next following didn't created..
//the RowAtIndexPath are not been executed..
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
NSString *concateValue=#"";
NSMutableDictionary *studentSecondDictionary=[[NSMutableDictionary alloc]init];
static NSString *CellIdentifier=#"Cell";
UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if(cell==nil){
cell=[[UITableViewCell alloc]initWithFrame:CGRectZero];
[cell setBackgroundColor:[UIColor redColor]];
[cell setSelectionStyle:UITableViewCellSelectionStyleNone];
[cell setIndentationWidth:0.0];
studentSecondDictionary=[firstPageArray objectAtIndex:indexPath.row];
NSString *name1=[studentSecondDictionary valueForKey:#"NAME"];
NSString *regno1=[studentSecondDictionary valueForKey:#"REGNO"];
NSString *marks1=[studentSecondDictionary valueForKey:#"MARKS"];
NSString *rank1=[studentSecondDictionary valueForKey:#"RANK"];
concateValue=[[[[[[name1 stringByAppendingString:#" "]stringByAppendingString:regno1]stringByAppendingString:#" "]stringByAppendingString:marks1]stringByAppendingString:#" "]stringByAppendingString:rank1];
cell.textLabel.text=concateValue;
}
return cell;
}
-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return firstPageArray.count;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
return 50;
}
- (IBAction)addButtonAction:(id)sender {
StudentPage *stdView=[self.storyboard instantiateViewControllerWithIdentifier:#"MyIdentifier"];
stdView.delegates=self;
[self.navigationController pushViewController:stdView animated:YES];
//[self.view addSubview:stdView.view];
}
-(void)didFinishSave:(NSMutableArray *)in_studentList{
firstPageArray=[[NSMutableArray alloc]init];
firstPageArray=in_studentList;
[self.tableView reloadData];
}
#end
StudentPage.h
#import <UIKit/UIKit.h>
#protocol StudentInfoDelegates
-(void)didFinishSave:(NSMutableArray*)in_studentList;
#end
#interface StudentPage : UIViewController<UITextFieldDelegate>
#property(assign,nonatomic)id<StudentInfoDelegates> delegates;
#property (strong, nonatomic) IBOutlet UITextField *name;
#property (strong, nonatomic) IBOutlet UITextField *regno;
#property (strong, nonatomic) IBOutlet UITextField *marks;
#property (strong, nonatomic) IBOutlet UITextField *rank;
- (IBAction)save:(UIButton *)sender;
#end
StudentPage.m
#import "StudentPage.h"
#import "FirstPage.h"
#implementation StudentPage
{
NSMutableArray *studentArray;
NSMutableDictionary *StudentDictionary;
}
#synthesize name,regno,marks,rank;
#synthesize delegates;
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[self.view endEditing:YES];
[super touchesBegan:touches withEvent:event];
}
- (IBAction)save:(UIButton *)sender {
studentArray=[[NSMutableArray alloc]init];
StudentDictionary=[[NSMutableDictionary alloc]init];
[StudentDictionary setValue:name.text forKey:#"NAME"];
[StudentDictionary setValue:regno.text forKey:#"REGNO"];
[StudentDictionary setValue:marks.text forKey:#"MARKS"];
[StudentDictionary setValue:rank.text forKey:#"RANK"];
[studentArray addObject:StudentDictionary];
[delegates didFinishSave:studentArray];
NSLog(#"%#",studentArray);
FirstPage *firstView=[self.storyboard instantiateViewControllerWithIdentifier:#"MyIdentifier1"];
[self.navigationController pushViewController:firstView animated:YES];
}
#end

Answer 1

As #BiWoj said in the comments, you are checking for
if (cell==nil)...
and rely on that check to go through the first time so you can fill out your data. This is wrong, you instead dequeue the cell and then when it's not nil you can start putting your data in its views. The only reason that cell will be nil is when you dequeue, using a non-existent identifier i.e. it should never happen.

Answer 2

First just check your delegate method is getting called or not when you click on save button.
I think you forgot to set delegate to self before
[delegates didFinishSave:studentArray];
It should be
self.delegate = delegates
[delegates didFinishSave:studentArray];
If this does not work please check that, you are pushing student page from first page like this
- (IBAction)addButtonAction:(id)sender {
StudentPage *stdView=[self.storyboard instantiateViewControllerWithIdentifier:#"MyIdentifier"];
stdView.delegates=self;
[self.navigationController pushViewController:stdView animated:YES];}
And one again on your save action method of student page you are pushing first page like this.
FirstPage *firstView=[self.storyboard instantiateViewControllerWithIdentifier:#"MyIdentifier1"];
[self.navigationController pushViewController:firstView animated:YES];
Well i guess instead of that you have to just use
[self.navigationController popToRootViewControllerAnimated:YES];
There is no need to push again the same controller you just have to pop to base controller.