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    <p>Here's my idea,</p> <p>Separate your CALayers from UIButton - UIKit won't allow anything on the background thread. </p> <p>When you have an opportunity in a screen preceding the button grid, use [buttonGridViewController performSelectorInBackground:renderCALayers] to render your CALayers in the background.</p> <p>When you load your button grid in viewDidLoad, overlay UIButtons with type UIButtonTypeCustom, and backgroundColor = [UIColor clearColor] over the top of your 'button' CALayers (make sure to call bringSubviewToFront on the UIButtons so they get the touch events). </p> <p>If you don't know how many buttons you are rendering, you might want to pre-render the maximum number you might display.</p> <p>If you have any questions please comment.</p> <p>EDIT:</p> <p>A few related items,</p> <p><a href="https://stackoverflow.com/questions/1837113/what-to-replace-a-uibutton-to-improve-frame-rate">What to replace a UIButton to improve frame rate?</a></p> <p><a href="https://stackoverflow.com/questions/3927536/ui-design-best-way-to-deal-with-many-uibuttons">UI design - Best way to deal with many UIButtons</a></p> <p><a href="https://stackoverflow.com/questions/573372/how-to-get-touch-event-on-a-calayer">How to get touch event on a CALayer?</a></p> <p>I believe the only way you'll get quicker load from this point is to either replace or remove UIButtons altogether and intercept touch events with another approach. That way all rendering can be done in a background thread before the view is presented.</p>
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    1. POFastest way to render UIButtons using layers and Grand Central Dispatch?
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    1. USCommunity
    1. USJacob Jennings
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    1. COfor various reasons I can not separate the CALAyers from the UIButton. However, as shown in mycode snippet, CALayers can be rendered in background.The snippet showed that I was rendering on the main thread the text layer only. I have just discovered that even this text layer may be rendered on a thread different from the main thread. With this modification, the view is now loaded immediately, but the buttons labels only appear 2-3 seconds later. Currently, I am using an HUD display that appears meanwhile the buttons are rendered.
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      1. USMassimo Cafaro
 

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