Setting the NSTextView Line Height in a Beautiful Way

In the original post about a cheap way to set the line height in a text view to, say, 150%, the result kind of worked but didn't look that cool. One issue is that the extra line spacing was exclusively added at the bottom. With the following solution, you'll get a proper line height with tastefully aligned insertion point and baseline and all.

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Setting the Line Height of a NSTextView

NSTextView (and UITextView for that matter) have a defaultParagraphStyle attribute where you can set the text's line height. That works swell – if you display text statically. Once the user can enter something, you can run into trouble: Update 2017-07: I posted a better version without paragraph style attributes that hooks into the NSLayoutManager delegate callbacks for a more consistent and speedy experience!

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