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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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This method provides a way to handle changes to the current trait collection, such as when the device is rotated.

I was proud of what I wrote. Int The number of levels of detail maintained by this layer. This method can be divided into 3 basic sections: If left unspecified the stop locations default to examole spaced.

I have to use code to split the large image file into smaller images at runtime. You create a shadow and set shouldRasterize to true discussed belowand then add the layer to the view hierarchy.

You use this filter when enlarging the image via contentsGravitywhich can be used to change both size resize, resize aspect, and resize aspect fill and position center, top, top-right, right, etc.

As you can see in the above animation, though, there is noticeable blockiness when fast-scrolling as individual tiles are drawn. Together, they make it unready for production use. I’m running into an issue with using CATiledLayer Sign up using Email and Password. CATransformLayer does not flatten its sublayer hierarchy like other layer classes, so it’s handy for drawing 3D structures. Okay, now to swap out our old TileView approach for one based on TiledView. By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy catileslayer and cookie policyand that your continued use of the website is subject to these policies.


CALayer Tutorial for iOS: Getting Started

Then create an instance layer for the replicator layer to use and set its frame so the first instance will be drawn at center x and at the top of someView ‘s bounds.

I shipped Version 2.

UIView takes care of many things including layout or handling touch events. The process of tiling the photo made it too easy to exhaust memory on the device.

The code also calls setUpLayer to set a few properties on the layer: Add this line to the end of the sizeContent method: By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. Add these lines to the bottom of setUpLayer:.

Play around with the various controls – it’s a great way to get catiledlaayer feel of what you can do with CALayer! CGRect call a setNeedsDisplay is called, the current execution of the draw call is finished and the result is cached.

Next, there are helper methods to convert degrees to radians and to set the emitter cell position to the midpoint of the view. I’ve filed a radar for this: This is great for very large images or other sets of content where you are only looking at small bits at a time, because you can start seeing your content without having to load it all into memory.


I think there’s a bug where the scale is incorrectly set in the sample code. Post as a guest Name. Basically I’m needing to break this image into tiles and be able to zoom in to view a lot of detail, but also be able to zoom all the way out and see the entire map.

This catiledlaher shares some tips I learned writing Pholio on managing large images. In a real project, it would generally not be advisable to pivot on a button’s title text.

ios – CATiledLayer shows previous tiles – Stack Overflow

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 exa,ple to the view hierarchy. Then observe touches and cycle through the sublayers of the transform layer. Each defaults to 0, and that effectively preserves color value across all instances.

Open up a new project or work with one of your existing ones, and see how you can utilize layers to achieve better performance or do new things to wow your users, and yourself! Next, you’ll program a butterfly that comes fluttering out of catiledlayed app to tickle your nose.