Question: How to make a `UITextView` to be filled with text starting from bottom edge, if it has unchangeable height? 

UPD: The text in UITextView should be shown on the in the bottom despite the UITextView's size.

Answer: 
In your textView delegate:

```
    - (void)textViewDidChange:(UITextView *)textView {
        UIEdgeInsets inset = UIEdgeInsetsZero;
        inset.top = textView.bounds.size.height-textView.contentSize.height;
        textView.contentInset = inset;
    }

```
If I understand you correctly you are trying to align your text to the bottom of the `UITextView`.
As far as I know there is no built in way to do this so you'll have to write it by yourself.
Take a look at the answer to [this question](https://stackoverflow.com/questions/7235310/uitextview-alignment-to-bottom) which describes one possible way of doing this.