Reuse an UITableViewCell (customized height for each one) in a twitter-like client

Question

I am working on a project like twitter client iOS version. When designing the tableview, every cell changes the height to accommodate its content (tweet).

But I met a problem: the current screen's cell height works well, but when scroll down, the new cell reuses the height of old cells.

Answer 1

Yes, table programming is where model-view-controller approach really comes usefull. If you change your cell height somewhere like tableView:didDeselectRowAtIndexPath: you could get a feeling that it works - but it doesn't. What you can do in this method is modify your data and reload the table (or part of it).

As mentioned in comments above you'll have to:

Provide correct height for each cell in

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

Provide correct view (cell) in

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

Whenewer you want to make some change you should modify your data in model (or appropriate object holding your content-related data) and then call one of the UITableView's reload methods, possibly:

- (void)reloadData
- (void)reloadRowsAtIndexPaths:(NSArray *)indexPaths withRowAnimation:(UITableViewRowAnimation)animation

Apple's documentation can be scarce (though i think it's quite proffesional): These would be the basic links for you:

UITableView Class Reference

UITableViewDataSource Protocol Reference

UITableViewDelegate Protocol Reference

Table View Programming Guide for iOS