UILabel doesn't change height in UITableViewCell in first scroll - ios

Question

I'm using tableview on storyboard.
I change label's frame in (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath function.
then, after some scrolling, it can change frame. but, when I open my application, frame doesn't change at first.
sorry, can't post image till 10 reputation.
please help.
- (UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
// get one row
Plan* planObj = [_planObjList objectAtIndex:indexPath.row];
// get custom cell info
LargeImageCell* cell = (LargeImageCell*)[tableView dequeueReusableCellWithIdentifier:#"CustomLargeImageCell"];
cell.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:#"bg"]];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.titleLabel.text = planObj.planTitle;
cell.titleLabel.numberOfLines = 0;
cell.titleLabel.lineBreakMode = NSLineBreakByWordWrapping;
cell.userNameLabel.text = planObj.getProducerName;
// title size
CGSize titleSize = [cell.titleLabel.text boundingRectWithSize:CGSizeMake(300.0f, CGFLOAT_MAX) options:(NSStringDrawingUsesLineFragmentOrigin) attributes:#{NSFontAttributeName: cell.titleLabel.font} context:nil].size;
// user name size
CGSize userNameSize = [cell.userNameLabel.text boundingRectWithSize:CGSizeMake(300.0f, CGFLOAT_MAX) options:(NSStringDrawingUsesLineFragmentOrigin) attributes:#{NSFontAttributeName: cell.userNameLabel.font} context:nil].size;
// set title size
cell.titleLabel.frame = CGRectMake(7.0f, 230.0f, 306.0f, ceilf(5.0f + titleSize.height));
cell.titleLabel.backgroundColor = [UIColor redColor];
// set name size
cell.userNameLabel.frame = CGRectMake(7.0f, ceilf(235.0f + titleSize.height), 148.0f, ceilf(5.0f + userNameSize.height));
cell.userNameLabel.backgroundColor = [UIColor blueColor];
}

Answer 1

autolayout was problem.
I switched off 'Use Autolayout' on storyboard. then, it became clear.
thank you all.

Answer 2

If your app is using Autolayout you should do it with Constraints. To resize a UILabel with Constraints that should has at least that properties:
Line Numbers = 0
Line Breaks = Word Wrap
And about Constraints you should set in both sides, and one to top, DONT set to bottom!!
To set right size in the row u can use this code example:
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
id data = [self.listOfNews safeObjectAtIndex:indexPath.row];
UIFont *font = [UIFont fontWithName:K_FONT_AVENIR_MEDIUM size:textSize];
if ([data isKindOfClass:[NewsModel class]]) {
NewsModel *news = (NewsModel *)data;
if (SYSTEM_VERSION_LESS_THAN(#"7.0")) {
CGSize constraintSize = CGSizeMake(cellTextWidth, MAXFLOAT);
CGSize textRect = [news.title sizeWithFont:font constrainedToSize:constraintSize];
return textRect.height + paddingTopAndBottom;
} else {
CGRect textRect = [news.title boundingRectWithSize:CGSizeMake(cellTextWidth, CGFLOAT_MAX)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{NSFontAttributeName:font}
context:nil];
return textRect.size.height + paddingTopAndBottom;
}
}
return 0;
}

Answer 3

Try resizing frames in willDisplayCell delegate method.

Answer 4

You can't change the size initially through cellForRow method. You need to calculate the size and return it in the following delegate
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
To calculate size for a label based on the text use
NSString *labelText=#"some text";
[myLabel setText:labelText];
UIFont *labelTextFont = [UIFont fontWithName:#"Helvetica" size:labelTextsize];
CGSize labelFrameSize = [labelText sizeWithFont:labelTextFont];
myLabel.frame = CGRectMake(xPos, yPos, labelFrameSize.width, labelFrameSize.height);

Answer 5

Remember these steps in order to have UILabel to change size:
1) If you have a Custom UITableViewCell, switch off AutoLayout on elements of the cell
2) Use heightForRowAtIndex protocol method to change the height
3) Set the numberOfLines = 0 for the UILabel inside the cell
4) If this does not work re-set the frame ( I found that this happens when you are trying to enlarge a UILabel in some "far" end of the cell)
Examples
- (UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
GeneralCell* cell = [tableView dequeueReusableCellWithIdentifier:#"GeneralCell"];
if (cell == nil) {
cell = [[GeneralCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:#"GeneralCell"];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
}
/////// USE the following block if still in trouble
CGRect frame = cell.label.frame;
[cell.label setFrame:frame];
[cell.label sizeToFit]; // this should not be necessary in general
///////////
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString *detail = [NSString stringWithFormat:#"YOUR TEXT]];
CGSize constraintSize = CGSizeMake(CELL_CONTENT_WIDTH, MAXFLOAT);
CGSize labelSize = [detail boundingRectWithSize:constraintSize
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{NSFontAttributeName:[UIFont systemFontOfSize:FONT_SIZE]}
context:nil].size;
float h = (fmod((int)labelSize.height ,2) == 0) ? labelSize.height : labelSize.height+1;
CGFloat height = MAX(h, 30.0f);
elemento = nil;
detail = nil;
return height + (CELL_CONTENT_MARGIN * 2);
}