UITableView DataSource method called twice

Question

My topic name might be seems familiar and it is.but believe me i've tried to get some help from other answers on stack overflow but still i can not understand, why DataSource method loads twice while i'm initialising tableview only once.

(Xcode6.3)

see my code...

#pragma mark- UITableView -
#pragma mark Setup TableView
-(void)setupTableView{
    if(!tblEvent){
        CGRect frame=CGRectMake(self.view.frame.origin.x,self.view.frame.origin.y+55+50,self.view.frame.size.width,self.view.frame.size.height-(55+100));
        tblEvent = [self createTableViewWith_Frame:frame Tag:1 separatorColor:[UIColor blackColor] BackgroundColor:[UIColor clearColor] ScrollIndicators:false];
        tblEvent.delegate=self;
        tblEvent.dataSource=self;
        [self.view addSubview:tblEvent];
    }else{
        [tblEvent reloadData];
    }
}
#pragma mark Create
-(UITableView*)createTableViewWith_Frame:(CGRect)frame Tag:(NSUInteger)tag
                          separatorColor:(UIColor*)separatorColor
                         BackgroundColor:(UIColor*)bgColor ScrollIndicators:(BOOL)value
{
    UITableView *tableView = [[UITableView alloc]initWithFrame:frame style:UITableViewStylePlain];
    tableView.tag=tag;
    tableView.backgroundColor=bgColor;
    tableView.separatorColor= separatorColor;
    tableView.showsVerticalScrollIndicator = value;
    tableView.showsHorizontalScrollIndicator= value;

    tableView.scrollEnabled = YES;
    tableView.separatorInset=UIEdgeInsetsMake(0, 8, 0, 8);
    tableView.userInteractionEnabled = YES;
    tableView.bounces = YES;

    [tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:cellIdentifire];

    return tableView;
}

#pragma mark UITableView DATASOURCEs
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{
//this method called 3 times, i don't know why.? :(
    return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
    return totalEvents.count;//this is my source.
}
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
    UITableViewCell* aCell = [tableView dequeueReusableCellWithIdentifier:cellIdentifire forIndexPath:indexPath];
    if(!aCell){
        aCell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifire];
    }

    return aCell;
}

#pragma mark UITableView DELEGATEs
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
    return 127.0f;
}
- (UIView*)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section{
    UIView* view = [[UIView alloc]init];
    return view;
}

i don't use didSelectRow:AtIndexPath: because i don't need to row selection.

NOTE:-

i use setupTableView method in Successful response of web service and web service is called from viewDidLoad. please guide me.

This seems to be normal. What's the problem if it runs more than once? BTW, `dequeueReusableCellWithIdentifier:forIndexPath:` is guaranteed to return a cell, so there' no need to check for a nil cell. Also, there's no need to implement `numberOfSectionsInTableView` if you have one section, since that is the default. — rdelmar, Jun 04 '15 at 05:33
Do u have your `UITableView` in your `.xib` or `Storyboard`? — gran33, Jun 04 '15 at 05:37
thanks @rdelmar for your comment. let me try according to your comment. — Vatsal Shukla, Jun 04 '15 at 05:37
@gran33, i'm creating tableview programatically in Storyboard as you can see. :D — Vatsal Shukla, Jun 04 '15 at 05:38
refer this answer http://stackoverflow.com/questions/2638359/uitableview-delegate-method-called-twice — Rizwan Shaikh, Jun 04 '15 at 05:46
@rdelmar, i tried according to you but it make no difference... — Vatsal Shukla, Jun 04 '15 at 05:48
I didn't say it would make a difference. I was just trying to clean up your code. I'll ask again -- why does it matter if the data source methods are called more than once? What problem does it cause? — rdelmar, Jun 04 '15 at 05:49
@rdelmar, sorry i didn't mean that but i'm not sure this issue is normal or not. thats why.. :( — Vatsal Shukla, Jun 04 '15 at 05:53
It is normal. It shouldn't be causing any problems so don't worry about it. — rdelmar, Jun 04 '15 at 05:55
refer this tutorial it may be help you http://jslim.net/blog/2013/03/22/ios-create-uitableview-with-custom-cell-programmatically/ — Rizwan Shaikh, Jun 04 '15 at 06:08

score 0 · Answer 1 · answered Jun 04 '15 at 05:43

Is there anything in your view controller that could be triggering a layout event (like a change to the table header view or some such)? That would cause it to call the datasource methods more than one.

P.S. SO won't allow me to post a comment to your question...

UITableView DataSource method called twice

1 Answers1