AutoLayout with Dynamic UITextView height

First, disable UITextView's scrollable.

Two options:
1. uncheck Scrolling Enabled in .xib.
2. [TextView setScrollEnabled:NO];

Create a UITextView and connect it with IBOutlet (TextView).
Add a dummy UITextView height constraint with default height, connect it with IBOutlet (TextViewHeightConstraint).
When you set your UITextView’s text asynchronously you should calculate the height of UITextView and set UITextView’s height constraint to it.

sample code snippet:

[TextView setText:song.lyrics];

CGSize sizeThatFitsTextView = [TextView sizeThatFits:CGSizeMake(TextView.frame.size.width, MAXFLOAT)];

TextViewHeightConstraint.constant = sizeThatFitsTextView.height;