At a high level (or low level if you\'d like), what\'s a good way to implement a smudge affect for a d开发者_StackOverflow中文版rawing program on the iPad using Quartz2D (Core Graphics)?Has anyone tri
I开发者_如何学C have a CGBitmapContext (bitmapContext) and I would like to draw some rectangle part (rect) of it to the current CGContext (context).
I need to make a game wit开发者_运维技巧h a tool bar of shapes that can be dragged on screen with the following functionality
I have few questions related to the PDF and its use on the Apple iPad: 1) Does the iPad support all Quartz PDF functions (i.e. all CGPDFxxx functions/classes)?
I want to create 2 separate layers using quartz 2D. Can i handle there redraw methods separately? so that i can redraw 1 layer without redr开发者_如何学JAVAawing the whole screen or other layers.
Is there any way to quit from drawRect: without refresh the current UIView? For example: - (void)drawRect:(CGRect)rect {
i have to animate text around a circle. The text will also scale up/down. Whats the best approach to accomplish this?(i am using Quartz 2D)
I开发者_开发问答\'m trying to draw a custom view with a drop shadow. I\'m having different results from iPhone OS 3.2. Has the coordinate system changed for CGContextSetShadowWithColor from 3.2?
In my iPhone App I\'d like to draw a few formulas. How can I manage that with quartz 2d? Is there a way to build formulas like for example in latex?开发者_开发问答 Or are there any existing frameworks
Any suggestions on how to perform erase operat开发者_JAVA技巧ions in Quartz 2D?CGContextClearRect(UIGraphicsGetCurrentContext(), rect);
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