How to resize UITableViewCell to fit its content?

Question

I have a UITableview with multiple reusable TableViewCells. In one cell I have a UITextView, that resizes itself to fit its content. Now I \"just\

Answer 1

You can only resize a UITableViewCell in tableView:heightForRowAtIndexPath: delegate method.

You have to estimate what the size of the text will be when that method is called for every row when the tableView is loaded.

This is what I did to solve the problem.

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
 {
     NSString * yourText = self.myArrayWithTextInIt[indexPath.row]; // or however you are getting the text
     return additionalSpaceNeeded + [self heightForText:yourText];
 }

 -(CGFloat)heightForText:(NSString *)text
 {
   NSInteger MAX_HEIGHT = 2000;
   UITextView * textView = [[UITextView alloc] initWithFrame: CGRectMake(0, 0, WIDTH_OF_TEXTVIEW, MAX_HEIGHT)];
   textView.text = text;
   textView.font = // your font
   [textView sizeToFit];
   return textView.frame.size.height;
  }

EDIT

While I used this solution for a while, I found a more optimal one that I would recommend using as it doesn't require allocating an entire textView in order to work, and can handle text greater than 2000.

-(CGFloat)heightForTextViewRectWithWidth:(CGFloat)width andText:(NSString *)text
{
    UIFont * font = [UIFont systemFontOfSize:12.0f];

    // this returns us the size of the text for a rect but assumes 0, 0 origin
    CGSize size = [text sizeWithAttributes:@{NSFontAttributeName: font}];

    // so we calculate the area
    CGFloat area = size.height * size.width;

    CGFloat buffer = whateverExtraBufferYouNeed.0f;

    // and then return the new height which is the area divided by the width
    // Basically area = h * w
    // area / width = h
    // for w we use the width of the actual text view
    return floor(area/width) + buffer;
}