In my current project I need to draw a complex background as a background for a few UITableView cells. Since the code for drawing this background is pretty long and CPU heavy when executed in the cell
This is somewhat of a hypothetical question, but I can imagine this situation coming up at some point in the future: Let\'s assume for a moment that I have a freakishly complicated hierarchy of UIView
I want to create a image out of Core OpenGL context. I used following code but it creates a black image. So I guess I cannot use glReadPixles there? Any other suggestions please?
I\'m trying to add modern OS X support to开发者_JAVA百科 OpenTK framework. Mac OS Lion supports OpenGL 3.2 Core context. I can successfully obtain it by using CGL. However, I can\'t find a straight wa
I would like to create a CGLayer, contains a point with gradient in boundary. Because I will use this layer to draw multiple points o开发者_运维百科n the main screen.
I\'m drawing a graph on a CALayer in its delegate method drawLayer:inContext:. Now I want to support Retina Display, as the graph looks blurry on the latest devices.
So I read here on SO that I can encode a CGLayerRef to a NSValue using NSValue *myCopy = [[NSValue all开发者_C百科oc] initWithBytes:&myLayer objCType:@encode(CGLayerRef)];
I have a finger painting view that I am implementing undo/redo. All the drawing occurs on a CGLayer called lineLayer.
In one of my view I am adding shadow to a view. Thing is that the shadow shows white spaces on left & right edges. I want to remove 开发者_如何学Gothese spaces.
I couldn\'t post the image, but I use the \"CGContextDrawRadialGradient\" method to draw 开发者_StackOverflowa shaded blue ball (~40 pixel diameter), it\'s shadow and to make a \"pulsing\" white ring
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