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 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.

These are CATransform3D properties that represent elements of a matrix that comprises a rectangular array of rows and columns.

I’m glad you asked, sort of: You’ve already seen an example of using CALayerand setting a few of the properties. I did all my device testing on an iPad 2, which has twice the memory of the iPad 1.

Pholio Coder’s Guide: Tiling Large Images

I’m running into an issue with using CATiledLayer What is the catileslayer of levelsOfDetail property of your tiled layer? This is a handy app that includes examples of 10 different types of CALayer s, which you’ll learn about in this article.


The number of eexample crossings in the even-odd diagram that form the pentagon shape is even, so the pentagon is exampl filled, whereas the number path crossings that form each triangle is odd, so the triangles are filled. Next, draw the shape layer’s path. CAShapeLayer makes use of scalable vector paths to draw, and it’s much faster than using images.

One of the biggest challenges I faced writing Pholio was handling large images. Notice how the star is centered — this is because you set the contentsGravity property to kCAGravityCenter. Stack Overflow works best with JavaScript enabled.

CAReplicatorLayer duplicates a layer a specified number of times, which allows you to create some cool effects. When you run the above code and pan the view, this would be the result:.

CATiledLayer – Core Animation | Apple Developer Documentation

Hence, setting red to 0 and the green and blue offset values to a negative number allows red to be the prominent color. I was proud of what I wrote. I should be seeing the entire map not cagiledlayer two tiles.

It’s fairly basic and cannot directly respond catiledlayet user touches or even check the bounds of the scrollable layer, but it does cool things like preventing scrolling beyond the bounds ad infinitum! This basic operation visibility calculation is essential to any rendering engine.

And in case you’re curious to know what this drawing looks like in PaintCode:.

Using the Camera Connection Kitphotographers will import full-resolution images onto their iPads. Bear in mind, startPoint and endPoint are not explicit points. CAGradientLayer makes it easy to blend two or more colors together, making it especially well suited to backgrounds.


CGSize The maximum size of each tile used to create the layer’s content. You have to provide the tiles and logic to tell the tiled layer which tiles to grab as the user scrolls around, but the performance gain here catilelayer remarkable.

Similarly, add the alpha offset to the alpha of each successive replicated instance.

CALayer Tutorial for iOS: Getting Started |

The previous changes are not animated, and if isGeometryFlipped is not set to truethe positional geometry and shadow will be upside-down. 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, caatiledlayer add the gradient layer to the view hierarchy.

When misused, performance is likely to take a nosedive. Add these lines to the bottom of setUpLayer:.

CALayer Tutorial for iOS: Getting Started

Finally, to create a little visual interest in the catilerlayer of zooming recode viewDidLoad to look like this:. See the update function here: Post as a guest Name. AVPlayeron the other hand, has quite a few additional properties and methods.