Expand label that all text can fit in ( UITableViewCell ) - ios

Question

I'm trying to create a tableviewCell with 1 label, to expand it when clicking on it and to collopase it again when again clicking on it. Now my animation on how to expand the cell is like this:
CGFloat targetHeightOfCell = [c.textLabel sizeOfMultiLineLabel].height;
_expandedState.height = #(targetHeightOfCell);
CGFloat difference = targetHeightOfCell - DEFAULT_CELL_HEIGHT;
CGFloat targetHeightOfContent = self.tableView.contentSize.height + difference;
[self.tableView beginUpdates];
[self.tableView endUpdates];
[UIView animateWithDuration:0.3f
animations:^{
CGRect frame = self.tableView.frame;
frame.size.height = targetHeightOfContent;
self.tableView.frame = frame;
}
completion:^(BOOL finished) {
}];
and in my heightForRowAtIndexPath I ofcourse return the right height. The cell expands but my calculation of sizeOfMultiLineLabel isn't correct. The text expands but still not all text is visible and so it's still appended by ...
This is my category on UILabel:
- (CGSize)sizeOfMultiLineLabel {
NSAssert(self, #"UILabel was nil");
//Label text
NSString *aLabelTextString = [self text];
//Label font
UIFont *aLabelFont = [self font];
//Width of the Label
CGFloat aLabelSizeWidth = self.frame.size.width;
//Return the calculated size of the Label
CGSize size = [aLabelTextString boundingRectWithSize:CGSizeMake(aLabelSizeWidth, MAXFLOAT)
options:NSStringDrawingUsesLineFragmentOrigin
attributes:#{
NSFontAttributeName : aLabelFont
}
context:nil].size;
//Check if the height isn't smaller then the default one
if(size.height < DEFAULT_HEIGHT){
return CGSizeMake(aLabelSizeWidth, DEFAULT_HEIGHT);
} else {
return size;
}
}
What I want is that how long the text is, the label must expand so the user can see it.

Answer 1

I assume that your label has numberOfLines set correctly. If not, you probably want to set it to 0 to ensure that it can have as many lines as needed. You also need to ensure the wrapping mode is correct, e.g. UILineBreakModeWordWrap. Finally, depending on your cell layout there might be margins arount the label - so ensure you account for that when returning the height.