layoutSubviews in UIViewTableCell does not work

问题

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:

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

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?

回答1:

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

回答2:

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.

回答3:

set frame for your label

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

来源：https://stackoverflow.com/questions/19834718/layoutsubviews-in-uiviewtablecell-does-not-work

标签

ios

objective-c

position

label