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.

Author: Gutaur Gardalkis
Country: Republic of Macedonia
Language: English (Spanish)
Genre: Literature
Published (Last): 21 September 2009
Pages: 240
PDF File Size: 7.31 Mb
ePub File Size: 3.74 Mb
ISBN: 573-2-47375-478-9
Downloads: 83469
Price: Free* [*Free Regsitration Required]
Uploader: Arashirg

Computing the tile index Rendering the tile Rendering the label Tile index computation is only presented as a placeholder; the index is used in the label and passed to some other functions, but never used for anything important. Truncation is a setting you can play with, and it’s nice when you’d like to represent clipped text with an ellipsis. As previously seen, this creates a CALayer instance and sets it to the bounds of someView.

This method can be divided into 3 basic sections: Note that adjusting the corner radius doesn’t clip the layer’s contents the star image unless the layer’s masksToBounds property is set to true. You’ve already seen an example of using CALayerand setting a few of the properties.

Each tile was saved as an individual PNG. You set the background color to Ray’s favorite shade of green: Next, set the replicator layer’s number of copies instanceCount and drawing delay. Int The number of magnified levels of detail for this layer. Set its corner radius to half of its width. Full-resolution photos can use a lot of memory when displayed — roughly 4 megabytes per megapixel.

CATiledLayer (Part 1) | Things that were not immediately obvious to me

Then build a cube by creating, rotating and then adding each side to the transform layer. Want to turn a square layer into a circle? Post Your Catileldayer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies.


Since the contexts passed to drawLayer: Since I can’t fix that, does anyone know of a good workaround for this issue?

Next, you’ll program a butterfly that comes fluttering out of the app to tickle your nose. If writing this sort of boilerplate drawing code is not your cup of tea, check out PaintCode ; it generates the code for you by letting you draw using intuitive visual controls or import existing vector SVG or Photoshop PSD files. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service. AVPlayeron the other hand, has quite a few additional properties and methods.

But if the zoomlevel is all the way out 0. Post as a guest Name. The rendering of a tile can be expensive and can use the render thread for 10ms. One to note is ratewhich is the playback rate from 0 to 1.

I have to use code to split the large image file into smaller images at runtime. But what you might not know is that each view in catiledpayer is backed by another class called a layer — a CALayer to be specific. 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.

Next, when the play button is tapped, it toggles controls to play the AV asset and set the button’s title. An Apple support engineer provided me with a workaround: Additionally, you have a variety of properties at your disposal to customize line thickness, color, dashing, how lines join other lines, and if that area should be filled and with what color, and more.

CALayer Tutorial for iOS: Getting Started

If the photographer is using an iPad 1, with MB of RAM, the device will be straining to show even one full resolution photo.

Catilexlayer attached to views, layers automatically have their contentsScale set to the appropriate scale factor for the current screen. Next, remove a ton of stuff from the zoomdemoViewController class:.


I should have just stopped talking and tried what you said. Also, since tiling is defined in pixel space, supporting code may fatiledlayer to be aware of the CATiledLayer’s resolution.

CGPoint tile which we will now add to TiledView. Simply catiledlsyer I find it more intuitive to work with degrees than radians. By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

Next, draw the shape layer’s path. I’m assuming it has something to do with the caitledlayer size cztiledlayer the zoom scale, but I really have no clue how to solve the problem. Then set up the emitter layer and cell, and add that cell to the layer, and the layer to the view hierarchy. You may notice that we’re skipping over the next demo in the Layer Player app. CGRectMake 0, 0, size. A customer contacted me telling me that the program was crashing. Here’s a sneak peak of some juicy examples:.

Sign up using Facebook. Homeschooldev 4 You can download the LayerPlayer project hereand you can download the completed first project here.

This basic operation visibility calculation is essential to any rendering engine. Sign up using Email and Password. Exampl said, there are a fairly large number of things missing from, and catuledlayer unaddressed by, this demo.

What is the value of levelsOfDetail property of your tiled layer? 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. The actual tile rendering code is essentially the same as that in the drawRect: Most exammple can typically play at various forward speeds, but it’s less typical that they can play in reverse.

He was working with full-resolution 10 MP images on an iPad 1.