Set row height of a UITableView according to the cell in that row

Question

I want to adjust the row height of a UITableView according to the cell in that row.

Initially, I tried to use

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

However, the problem is, when the table is loading, the calling flow is seemed to be:

First call:

(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

Then call:

(UIViewTableCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

which means, before my cell is generated, I have to tell the table the height of its row.

However, what I want is exactly the opposite, i.e., after my cell is generated, I tell the table the height of this rows.

Is there any method to achieve this?

Answer 1

Make an array of heights for every row based on the data from tableView: cellForRowAtIndexPath: and in the tableView heightForRowAtIndexPath: just take the height value from that array.

Declare in your implementation file:

NSMutableArray *heights;

In viewDidLoad: initialise it:

heights = [NSMutableArray array];

In tableView: cellForRowAtIndexPath: set the height for each row:

[heights addObject:[NSNumber numberWithFloat:HEIGHT]];

And in the tableView heightForRowAtIndexPath: return required height:

return [heights objectAtIndex:indexPath.row];

This should work because tableView: cellForRowAtIndexPath: is called for every cell and then for every cell tableView heightForRowAtIndexPath: is called.