UITableView frame base on number of cell - ios

Question

As My title said that i want to set frame of UITableView base on number of cell. Cell's height of UITableView is dynamic it is not fix, for do this i apply my following logic
NOTE: I added UITableView on UIScrollView so it is easy to scroll/see whole table's content. And i know UITableView has own scrollView but in my project i need set height of UITableView base on number of cell (dynamic height of cell).
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
[self adjustHeightOfTableview]; // custom method for set height of tableView
}
- (void)adjustHeightOfTableview
{
CGRect frame = self.tblView.frame;
frame.size.height = tblHeight; // tblHeight is CGFloat, declare in .h file
self.tblView.frame = frame;
self.scrollView.contentSize = CGSizeMake(300, self.tblView.frame.origin.y + self.tblView.frame.size.height);
}
And get from
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"%d", indexPath.row);
NSString *AnswerHeight = [[self.listOfQuestions objectAtIndex:indexPath.row] objectForKey:#"Answer"]; // get
CGSize constraint = CGSizeMake(queWidth - (10.0f * 2), 20000.0f);
CGSize size = [AnswerHeight sizeWithFont:[UIFont fontWithName:#"OpenSans-Bold" size:12] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
CGFloat height = MAX(size.height, 52);
tblHeight = tblHeight + height + (10.0f * 2) - 1.5; // set tblHeight
return height + (10.0f * 2) - 1.5;
}
But problem is that heightForRowAtIndexPath call 2 times so i am not able to get proper tblHeight so my tableView's height not set properly.
Why my heightForRowAtIndexPath call 2 times or How can i solve my problem ?? or any other solution for set tableView's frame base on dynamic number of cell ??
Just for understanding
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 5;
}

Answer 1

why to not make empty footerView.
UIView *footerView=[[UIView alloc]initWithFrame:CGRectZero];
self.taskListTable.tableFooterView=footerView;
and then change the table frame where you thinks it will change:
like in viewWillApear or any of your action
self.taskListTable.frame= CGRectMake(0,0, 320, self.view.bounds.size.height);

Answer 2

Each row will call heightForRowAtIndexPath everytime it will appear in the visible rows, so the solution is quite simple.
Create an NSMutableArray, with number of rows as your table view, then everytime you calculate the height of a row, just change that array's index for that indexPath's row with the height of that row.
And whenever you want the height of the table, just sum all your array's rows, that should do it.
If you have any more clarifications, just ask (Y)

Answer 3

heightForRowAtIndexPath will call for each row which is going to visible.
You can calculate table height in viewDidAppear or ViewWillApearMethod.
for (int i =0 ; i < self.listOfQuestions.count; i++) {
NSString *AnswerHeight = [[self.listOfQuestions objectAtIndex:i] objectForKey:#"Answer"]; // get
CGSize constraint = CGSizeMake(queWidth - (10.0f * 2), 20000.0f);
CGSize size = [AnswerHeight sizeWithFont:[UIFont fontWithName:#"OpenSans-Bold" size:12] constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];
CGFloat height = MAX(size.height, 52);
tblHeight = tblHeight + height + (10.0f * 2) - 1.5; // set tblHeight
}
Check my updated answer