IOS – remove ALL padding from UITextView

Although it is iOS 7 only, an extremely clean solution is to set the textView’s textContainerInsets as such:

[textView setTextContainerInset:UIEdgeInsetsZero];
textView.textContainer.lineFragmentPadding = 0; // to remove left padding

This will effectively remove all padding (insets) around the text inside the text view. If your deployment target is iOS 7+ then this is the best solution thus far.