CODEWITHSUNDEEP
iphoneobjective-cuitableview
Novarg
Novarg

Reputation: 7440

UITableView doesn't reload

I have a problem with updating the UITableView. I call the reloadData method on it, but cellForRowAtIndexPath doesn't get called. Code:

//.h
@interface MasterViewController : UIViewController<ELCTextFieldDelegate, UITableViewDelegate, UITableViewDataSource> {
  //some variables
}
@property (nonatomic, retain) IBOutlet UITableView *theTableView;
//other properties

//.m
- (void)viewDidLoad {
  //some code
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
  [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}

- (void)keyboardWillHide:(NSNotification *)notification {
  self.theTableView.frame = CGRectMake(0, 0, 320, 480 - 64);
  [self.theTableView reloadData];
}

I connected the theTableView with UITableView in the xib and I also set it's delegate and dataSource to File's Owner.

I use ELCTextFieldCell which provides me with a UITableViewCell with a UILabel and a UITextField. I insert some values in the cells and when the keyboard hides that tableView should reload it's data to show the correct result in one of the cells. I did some debugging and calculations work as it should, but that cell doesn't refresh(as I mentioned the cellForRowAtIndexPath method doesn't get called after [self.theTableView reloadData].

Thank you.

Any help would be appreciated

EDIT

Found an "ugly" solution for that. Instead of calling 

[self.theTableView reloadData];

I called

[self.theTableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:[NSIndexPath indexPathForRow:7 inSection:0]] withRowAnimation:UITableViewRowAnimationNone];

It's ugly and hard-coded which may lead to problems later if I will add more cells or remove some, but it works.

Still looking for a solution that would use reloadData method

Upvotes: 1

Views: 2641

Answers (3)

Alladinian
Alladinian

Reputation: 35616

reloadData redisplays only visible rows (for efficiency). The fact that you set your tableview's frame just before reloadData makes me think that the tableview for some reason doesn't see that the particular cell is visible at that time, so it doesn't ask for a new one (and this explains why after scrolling down/up it refreshes correctly). Try to poll your tableview to see what reports as visible cells prior calling reloadData ([theTableView visibleCells];). I hope that this will help you track the problem.

Upvotes: 6

Rajneesh071
Rajneesh071

Reputation: 31081

Table is reloaded only if u have some changes in table.....

Upvotes: 1

Mihir Mehta
Mihir Mehta

Reputation: 13833

check if tableView is not nil... if so allocate memory

what is returning in the 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

and

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

both returning non zero value than it should be called

Upvotes: 0

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