core-graphics

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iOS SDK- How to detect touch on Pie Chart slice?

I have developed an animat开发者_如何学编程ed Pie Chart, in which when a user clicks on a Pie Chart slice, it comes out of the chart. Currently, I am drawing each slice of the Pie on a different CGLay[详细]

2023-03-24 06:38 分类：问答
Draw radial data on iPhone using CoreGraphics

I am trying to draw radar data on top of a map using CoreGraphics.Before, I was trying to draw each data point individually by making a path around each individual data point and then filling the appr[详细]

2023-03-24 02:51 分类：问答
How do I uniquely identify cgcontext?

Is there a开发者_StackOverflow社区ny way by which it is possible to uniquely identify CGContextRef?[详细]

2023-03-23 13:15 分类：问答
How can I edit PDF files in an iOS application?

In my iPhone / iPad application, I show a person\'s medical reports in the form of a PDF. I have saved the reports in the documents directory and am reading them from there.[详细]

2023-03-23 12:58 分类：问答
How can I prevent skew when scaling a UIView in one direction after rotation?

I\'m rotating a UIView in the following manner: CGAffineTransform currentTransform = [gestureRecognizer view].transform;[详细]

2023-03-23 12:13 分类：问答
Draw squares with Core Graphics or include pngs?

I\'m making a legend for a graph that will basically 开发者_StackOverflow中文版look like this: [ ] Line 1[详细]

2023-03-23 05:20 分类：问答
How should I design displaying a dynamic map? (Coordinates + Lines)

So I want to have a view (NSView, NSOpenGLView, something CG related?) which basically displays a map.Such as:[详细]

2023-03-22 19:08 分类：问答
Drawing circles in Core Graphics - why isn't this working?

I\'m trying to create a simple drawing app that creates circles wherever you 开发者_开发问答put your finger, this is what I have:[详细]

2023-03-22 16:20 分类：问答
How to draw a stroke outline using CGContext API?

I have an icon image I would like to draw a 1px, colored 0.5 opacity line around, inside the image (similar to Stroke layer style with position:inside in Photoshop). So far I\'ve tried this:[详细]

2023-03-22 15:38 分类：问答
CoreGraphics Quartz drawing shadow on transparent alpha path

Searching the web for about 4 hours not getting an answer so: How to draw a shadow on a path which has transparency?[详细]

2023-03-20 09:25 分类：问答