cgcontext

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gradient in CGContextAddArc?

I am using following code for Drawing Arc in DrawRect...I want to draw Arc onlywith gradient effect ...any help please?[详细]

2023-02-04 19:30 分类：问答
Create a UIImage by rendering UIWebView on a background thread - iPhone

Does someone know of a way, or has a creative idea as to how to obtain an UIImage that is rendered from a UIWebView? The catch is, that is must be on a background thread.[详细]

2023-02-03 12:13 分类：问答
CGContext transparency problem

I have an UIView w开发者_JS百科hich has white background color set. I have set the blending mode of the CGContext of the UIView as \'kCGBlendModeCopy\'.[详细]

2023-02-01 05:34 分类：问答
string in circle format in iphone sdk?

is it possible to to draw a string in CGContext in circle path (l开发者_StackOverflow社区ike circle instead of line)?Look in the developer documentation for the \"Circle View\" demo application. It dr[详细]

2023-01-31 23:59 分类：问答
draw in a sub view added programmatically?

I have a UIScrollView added programmatically to a UIView. 开发者_开发技巧I want to draw few images to the UIScrollView itself.[详细]

2023-01-31 23:01 分类：问答
using UIImage drawInRect still renders it upside down

I have read some posts on this website about using drawInRect instead of the CGContext draw methods. It still draws it upside down? I thought using drawInRect would print it right side up with the coo[详细]

2023-01-31 18:40 分类：问答
How to render a UIView hierarchy into a CGContext with CoreAnimation composition model

I am trying to render a UIView hierarchy into a CGContext or ultimately a UIImage.Some of the child views have 3D transforms, which renderInContext: ignores along with shadows and some other CALayer p[详细]

2023-01-31 13:45 分类：问答
Animating the drawing of a line programatically using Quartz 2d on IOS

I\'m trying to draw an animated growing line using Quartz 2d, by adding points to an existing line, gradually over time. I started drawing a new line, In the drawRect method of a UIView, by obtaining[详细]

2023-01-31 09:20 分类：问答
How could I get CGContextRef from UIImage?

CGContextRef context = ??; // get fr开发者_如何学编程om UIImage *oldImage CGContextSaveGState(context);[详细]

2023-01-31 00:48 分类：问答
UIImage stretchableImageWithLeftCapWidth doesn't work when drawing to a quartz context

I\'m drawing an image with开发者_JS百科 strechable caps defined like the following: [bubbleImg stretchableImageWithLeftCapWidth:17 topCapHeight:12];[详细]

2023-01-30 16:09 分类：问答