How to update a UITableVIewCell without reloading full table

Question

Possible Duplicate:
Is it possible to refresh a single UITableViewCell in a UITableView?

In a sequence I am updating only a particular object in my list data(NSMUtableArray), once updated its value, To make the GUI update, I was reloaded the full table like below...

[table reloadData];

It worked fine, However in efficiency point, it is hanging little bit while I am scrolling, Is there any way to update only a particular cell without reload full table?

thanks.

You can check this if it helps solve your problem http://stackoverflow.com/questions/7040740/reload-spefic-table-cell-ios — Rushi, Feb 05 '13 at 07:29

score 31 · Accepted Answer · answered Feb 05 '13 at 07:20

31

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

Use this

answered Feb 05 '13 at 07:20

amar

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it worked, but still the freezing is there while scrolling for this update also.. – Newbee Feb 05 '13 at 07:45
Does your cell has images? – amar Feb 05 '13 at 08:21
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Use lazy Loading for them – amar Feb 05 '13 at 08:21
@amar Does "lazy loading" basically mean asynchronous loading? – Supertecnoboff Aug 22 '15 at 15:24
@Supertecnoboff yeah its a tech slang which means the loading is lazy and comes after the cell has been loaded. – amar Aug 23 '15 at 05:38
Proper answer is here http://stackoverflow.com/questions/4448321/is-it-possible-to-refresh-a-single-uitableviewcell-in-a-uitableview – Mehul Chuahan Sep 20 '16 at 16:47
@MehulChuahan thats actually wrong implementation we do not need begin and end updates for using reloadRows.It is needed only for insertrow and remove row – amar Oct 06 '17 at 06:31

score 9 · Answer 2 · answered Feb 05 '13 at 07:51

You can use this..

NSArray *indexPathArray = [NSArray arrayWithObject:[NSIndexPath indexPathForRow:1 inSection:0]];
//You can add one or more indexPath in this array...

[tblview reloadRowsAtIndexPaths:indexPathArray withRowAnimation:UITableViewRowAnimationFade];

score 2 · Answer 3 · answered Feb 05 '13 at 07:36

2

You can get the cell object by -

UITableViewCell *cell = [table cellForRowAtIndexPath:indexPath];

now change its related values as per your object from data array. It should reflect in the table. Hope this helps.

answered Feb 05 '13 at 07:36

Nameet

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Thanks, mate. This worked wonderfully for me. – Felipe Jun 28 '18 at 22:47

score 2 · Answer 4 · answered Feb 05 '13 at 08:31

2

You can reload particular image row using index path .

    [mainTableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath]
                         withRowAnimation:UITableViewRowAnimationNone];

answered Feb 05 '13 at 08:31

Rajneesh071

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Rushi · Answer 5 · 2013-02-05T07:46:05.987

1

As you are making a GUI update, it's better to use reloadData rather then using any other methods. reloadData is the best way in your case to update the UITableView as it avoids inconsistency. The other thing which you can do is, you can add a condition in your cellForRowAtIndexPath and let execution happen only for the cell which is modified.

edited Feb 05 '13 at 07:46

answered Feb 05 '13 at 07:25

Rushi

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2

This is wrong. There are several ways to updates parts of a UITableView. reloadRowsAtIndexPaths, reloadSections and reloadSectionsWithIndexTitles will all reload parts of a UITableView. – Fogmeister Feb 05 '13 at 07:40
1

@Fogmeister my sentence is incorrect. I meant to say the condition in which Newbee is trying to use it. I've edited my answer. – Rushi Feb 05 '13 at 07:44

score 0 · Answer 6 · answered Feb 05 '13 at 07:21

0

If you're just adding one item, and you wish to have that added to the table, you can manually insert it into your UITableView, here's an example:

NSIndexPath *indexPath = [NSIndexPath indexPathForRow:_directions.count-1 inSection:0];
NSArray *indexPaths = [NSArray arrayWithObject:indexPath];
[self.tableView insertRowsAtIndexPaths:indexPaths withRowAnimation:YES];

answered Feb 05 '13 at 07:21

David Chavez

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I already added that object need to updates its value – Newbee Feb 05 '13 at 07:25

How to update a UITableVIewCell without reloading full table

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