CATILEDLAYER EXAMPLE PDF

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CATiledLayer uses different set of tiles to handle different levels of zoom This example is exactly what we left from previous part of this tutorial. Based on some further logging I’ve added to the example project, I think the problem is this: The CATiledLayer has two render threads that. Let’s take a look at a CATiledLayer demo. I first ran across the CATiledLayer class when I was looking into a multithreaded, tiled.

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Then set up the emitter layer and cell, and add that cell to the layer, and the layer to the view hierarchy.

If the ids differ, schedule a new setNeedsDisplay call. CAGradientLayer makes it easy to blend two or more colors together, making it especially well suited to backgrounds. This method can be divided into 3 basic sections: Objects used to create true 3D layer hierarchies, rather than the flattened hierarchy rendering model used by other CALayer classes.

In the above code, you create a gradient layer, match its frame to the bounds of someViewassign an array of colors, set start and end points, and add the gradient layer to the view hierarchy. As you can see in the above animation, though, there is noticeable blockiness when fast-scrolling as individual tiles are drawn.

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Smooth scrolling requires you load more than one photo into memory, though. After a few emails catileslayer and forth, I figured out why: I’m glad you asked, sort of: It’s also false by default.

I shipped Version 2. This demo completely punts on one of the trickiest problems that would be encountered in a production implementation of CATiledLayer ; no effort is made to associate geometry with the proper tiles.

Sign up using Facebook. I can’t seem to find any solutions to my issue on the Google. You don’t need to actually code anything for cati,edlayer rest of this article, so just sit back, read, and relax: I’m running into an issue with using CATiledLayer Layer Player includes controls to adjust all of the above-mentioned properties, and several more:.

You need to set the contentsScale explicitly for layers you create manually, or else their scale factor will be 1 and you’ll have pixelation on retina displays.

Pholio Coder’s Guide: Tiling Large Images

Next, you’ll program a butterfly that comes fluttering out of the app to tickle your nose. Then sets an image as the layer’s contents and centers it within the layer.

Here’s what it would look like:. However, setting rate also instructs playback to commence at that rate. The label is rendered for debugging purposes only. However, in this case, the instance catilsdlayer was originally set to white, meaning red, green and blue are 1.

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Once I had the photo broken down into tiles, I relied on a simple custom UIView subclass to show the photo. As you probably know, everything you see in an iOS app is a view. Okay, now to swap out our old TileView exam;le for one based on TiledView. The image has been shipped with the starter project.

Pholio Coder’s Guide: Tiling Large Images – Brian’s Brain

As mentioned earlier, every view in iOS has a layer associated with it, and you can retrieve that layer with. I did all my device testing on an iPad 2, which has twice the memory of the iPad 1. The iPad screen has a resolution of a little under one megapixel. See the CAEmitterLayer catiledoayer later.

CATiledLayer (Part 1)

Sign up or log in Sign up using Google. Add this method to the automatically generated implementation file:.

Next, when the play button is tapped, it toggles controls to play the AV asset and set the button’s title. This entry was posted in iPhone. I think the result is pretty nice, though: