catiledlayer

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CATiledlayer distortes CGPath

I am using CATiledlayers and UIScrollviews to draw CGPaths at different levels of detail. I am drawing big pictures (4000x4000). On the iPhone the image gets distorted for these large pictures.[详细]

2023-02-20 23:33 分类：问答
UIView backed by CATiledLayer in UIScrollView doesn't scroll initially

I\'m adding a CATiledLayer backed UIView in UIScrollView. When the view is first loaded, I\'m trying to fit the UIView, by setting the zoomScale of UIScrollView - this fits the UIView and the layered[详细]

2023-02-18 01:18 分类：问答
What is the secret behind "contentScaleFactor" of UIView when used with CATiledLayer?

Greetings, I\'m working on an application inspired by the \"ZoomingPDFViewer\" example that comes with the iOS SDK. At some point I found the following bit of code:[详细]

2023-02-16 01:09 分类：问答
Not all tiles redrawn after CATiledLayer -setNeedsDisplay

My view has a CATiledLayer. The view controller has custom zooming behavior, so on -scrollViewDidEndZooming every tile needs to be redrawn. But, even though -setNeedsDisplay is being called on the lay[详细]

2023-02-15 01:46 分类：问答
Detect touches within UIScrollView and CATilerLayer

How can i detect the touch (x,y) of my pdf rendered in the ScrollView. To be clear: I want th开发者_StackOverflowe x,y of the pdf not of the screen.[详细]

2023-02-12 23:07 分类：问答
How to correctly handle threading when drawing Core Data entity information with CATiledLayer

I\'m contemplating how to offload the drawing of a very large Core Data tree structure to CATiledLayer. CATiledLayer seems to be awesome because it performs drawing on a background thread and then fad[详细]

2023-02-11 21:47 分类：问答
How to optimize drawing of a UIView that contains subviews with CATiledLayer layers

I have a UIView within a UIScrollView that contains many UIView subviews. Each of these subviews has a CATiledLayer layer. In addition, I have a magnifying loupe functionality that draws the container[详细]

2023-02-08 18:10 分类：问答
Using CATiledLayer's drawLayer:inContext:

I am trying to implement my own map engine by using CATiledLayer + UIScrollView. In drawLayer:inContext: method of my implementation, if I have a certain tile image needed for the current bounding bo[详细]

2023-02-07 17:55 分类：问答
Segment a CGImage

In iOS 4.0 and later is there a way to segment a CGImage without loading the entire image into memory? What I am attempting to do is * programmatically* segment an image for use in a CATil开发者_高级运[详细]

2023-02-05 04:30 分类：问答
How can I make a UIScrollView with a large image that displays fast (like Photos.app)?

I\'m trying to make a simple image viewer for viewing the full resolution image of an ALAssetRepresentation. It turns out it\'s not quite that simple.[详细]

2023-02-04 17:27 分类：问答