quartz-graphics

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CGContextDrawAngleGradient?

Dipping my feet into some more Core Graphics drawing, I\'m attempting to recreate a wicked looking metallic knob, and I\'ve landed on what is probably a show-stopping issue.[详细]

2023-03-24 17:35 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
animate pan gesture

i have wrote a subclass of UIView, which in drawRect: draws itself. it is actually something like day-long timeline for movie - it draws time axis with ticks and time text labels. it can be zoomed in[详细]

2023-03-23 10:29 分类：问答
Quartz 2d Drawing: Perfect on simulator / bad on device. Distribution Vs Debug

I\'ve just finished waveform drawing code for my app. I\'m pretty happy with it and on the simulator it looks great.[详细]

2023-03-23 02:26 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
Drawing a Linear Gradient in Quartz and turn it into a circle

I want to draw a Linear Gradient and turn it into a circle, so that it looks like this at the end. Since this isn\'t a开发者_运维技巧 usual linear gradient, nor a real radial gradient, I do not have[详细]

2023-03-22 12:48 分类：问答
drawRect not getting called when needed under OS X

I am using a window that uses a subclass of NSView.Part of it is drawn when the program starts, another part needs to be drawn when the user clicks on a button in another window.The code for the other[详细]

2023-03-22 06:45 分类：问答
How to draw a triangle programmatically

I have a triangle solver, I want a way to use the values I get fr开发者_JAVA百科om the answer to draw a triangle to the screen that matches it. If you subclass a UIView you can implement something lik[详细]

2023-03-20 14:42 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
Centering text drawing in Quartz

I have a pie chart and I\'m placing labels like 5%, 10%, etc around the pie chart.I find the exact center point of that pie segment, by rotating, and translating my coordinate system.In the end, I bas[详细]

2023-03-20 00:33 分类：问答