Short version: Is it possible to do the expensive parts of setting UITextView attributedText on a background queue in advance of the UITextView main thread setup?
Long version: Setting attributedText on UITextView is expensive, and UILabel is not an option for us. Is there a way to create a text container and layout manager ourselves in order to perform the expensive work on another queue in advance of setting up the UITextView? Ideally we wouldn’t need to have the layout manager draw a bitmap that we show instead of the UITextView altogether. We’re currently calling the layout manager’s ensureLayout(..) function on a background queue but not seeing an improvement in the main thread performance of setting the attributedText on the UITextView. Does ensureLayout(..) not compute and cache the layout work? Or is the layout work not the expensive part of setting attributed text?
