Multiple line UIlabel in UItableviewcell using Autolayout - ios

Question

I have set setMaXPreferredLayoutWidth to UILabel and added all the required constraints to the UIlabel now I can see multiline UIlabel in my UItableviewcell but my problem is I am getting extra padding at the top and bottom of my UIlabel based on MaxpreferredLayoutWidth value.
When I set the MaxPreferreLayoutWidth to 200 I get this
When I set the MaxPreferreLayoutWidth to 100 I get this
In general UIlabel height depends based on preferredMaxLayoutWidth.
Can any one say me how to remove this extra padding and render the exact height of UIlabel?

Answer 1

Try this code,
CGSize suggestedSize = [textWithMultipleLines sizeWithFont:myLabel.font constrainedToSize:CGSizeMake(width, FLT_MAX) lineBreakMode:NSLineBreakByWordWrapping];//here "width" is the maximum acceptable width of myLabel
CGRect labelFrame = myLabel.frame;
labelFrame.size = suggestedSize;
[myLabel setFrame:labelFrame];
and in
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
{
//get the string assigned to label
CGSize suggestedSize = [stringAssignedToLabel sizeWithFont:myLabel.font constrainedToSize:CGSizeMake(width, FLT_MAX) lineBreakMode:NSLineBreakByWordWrapping];
return suggestedSize.height+5;
}

Answer 2

The simplest way to this is to extend your own UITableViewCell class, and create a UILabel there, also create a public getMethod:
Interface:
- (CGFloat)getLabelHeight;
Implementation:
- (CGFloat)getLabelHeight {
return label.frame.size.height
}
TableView File:
-(CGFloat)heightForRowAtIndexPath {
return [cell getLabelHeight]
}
- (UITableViewCell *)cellForRowAtIndexPath:(NSIndexPath)indexPath {
your_cell_instance = [[Your_Cell_Class alloc]initWithTableViewCellStyle:UITableViewCellStyleDefault andReuseID:your_reuse_id];
your_cell_instance.text = #"Your Long Text"
[your_cell_instance setNumberOfLines:0];
[your_cell_instance sizeToFit];
return your_cell_instance;
}
Its important to set first the text of the label and then // number of lines and sizeToFit //
And you need to reload the tableView data in proper of your time
I Haven't time to test it, but i hope it works.

Answer 3

We have to set the tableviewcell's frame while calculating the height of the cell in heightForRowAtIndexPath
Ex:
[tableViewCell setFrame:CGRectMake(0, 0, CGRectGetWidth(self.tableView.bounds), CGRectGetHeight(tableViewCell.bounds))];
and then in layoutSubviews method of UItableviewcell we have to set the preferredMaxLayoutwidth
Ex:
[self.multilineLabel setPreferredMaxLayoutWidth:CGRectGetWidth(self.bounds)];