layoutSubviews in UIViewTableCell does not work

Question

I have a class PostListTableCell, inheriting UITableViewCell, which is used as my custom cell in a UITableView.

I need to resize some labels in the cell, so I called following method in

- (void)layoutSubviews {
    [super layoutSubviews];
    [_titleLabel sizeToFit];
}

But the problem is, when the UITableView loaded, the _titleLabel does not resize:

enter image description here

But after I click this cell and select it, the title did resize:

enter image description here

Following is the code to load data:

- (PostListTableCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *PostListTableCellIdentifier = @"PostListTableCell";
    PostListTableCell *cell = (PostListTableCell*) [tableView dequeueReusableCellWithIdentifier:PostListTableCellIdentifier];

    if (cell == nil) {
        cell = [[PostListTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:PostListTableCellIdentifier];
    }

   Post *post = (Post*)_posts[indexPath.row];
    [cell loadPost:post];

    return cell;
}

Could anyone help?

Have you tried setting a breakpoint in -layoutSubviews to see when exactly it gets called? — Jeffery Thomas, Nov 07 '13 at 11:39
Are you sure your layoutSubviews is getting called at right time? — eagle.dan.1349, Nov 07 '13 at 12:16
@MirkoCatalano, that is exactly the point!!!!! Thanks!!!! BTW, could you explain a bit more? Why does autolayout can cause such problem? — HanXu, Nov 07 '13 at 12:16
@JefferyThomas, I tried, and did not find problems. In fact, problem is solved by Mirko's suggestion now. — HanXu, Nov 07 '13 at 12:18
@eagle.dan.1349, my layoutSubviews is inside the PostListTableCell class, which I believe is in the right place....In fact, problem is solved by Mirko's suggestion. — HanXu, Nov 07 '13 at 12:19
the problem was that autolayout resize your label after your set again because it follow the constraints and not the frame set — Mirko Catalano, Nov 07 '13 at 12:32

score 2 · Accepted Answer · answered Nov 07 '13 at 12:35

2

The problem is the autolayout that resize again the label for you with the constraints that you had set when you make the label in Interface Build, unfortunately in under autolayout the the hierarchy is Constraints > Frame

answered Nov 07 '13 at 12:35

Mirko Catalano

3,830
2
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39

score 1 · Answer 2 · edited May 23 '17 at 11:48

1

First of all, if you use Autolayout in (viewDidLoad) method which is related to UIViewController and its subclasses and (awakeFromNib) which is related to UIView and UITableViewCell etc all Views Frames' have not been rendered yet while those methods called.

So if you want to resize any of outlets you should call it in (ViewDidAppear) for UIViewController. In UIViews and cells you should use:

- (void)layoutSubViews
{
     [super layoutSubviews];
}

And don't forget to set interval to your Method of resizing as in this answer.

edited May 23 '17 at 11:48

Community

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1

answered Oct 22 '16 at 23:04

Attia Mo

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i have a concern about setting an interval , what is the ideal milliseconds taken for rendering , and what if i have too many subviews , is this the best soultion out there in terms of performance and responsiveness ? – Shady Keshk Oct 22 '16 at 23:09

score -1 · Answer 3 · answered Nov 07 '13 at 12:17

-1

set frame for your label

-(void)layoutSubviews
{
    CGRect frame = CGRectMake(20, 30, 200, 50);
   _titleLabel.frame = frame;
}

answered Nov 07 '13 at 12:17

IKKA

4,963
5
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layoutSubviews in UIViewTableCell does not work

3 Answers3

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