Recent questions tagged Quartz

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quartz graphics - setNeedsDisplayInRect bug in iOS5?

I'm trying to use setNeedsDisplayInRect: in iOS5 to optimize some drawing code. The setup is simple: I have an ... { // other drawing code } See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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271 views

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quartz graphics - iPhone clip image with path

I would like to clip an image with path. In the book Programming with Quartz there is an example on how to ... Is there any example or pointer? See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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343 views

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quartz graphics - Is there a way to draw a CGContextDrawRadialGradient as an oval instead of a perfect circle?

I need a radial gradient in the shape of an oval or ellipse and it seems like it CGContextDrawRadialGradient can only ... to do this? Thanks! See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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254 views

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quartz graphics - iPhone: why isn't drawRect getting called?

Okay, I guess I'm missing something important, and I can't seem to find the answer. I'm posting all the ... dealloc { [super dealloc]; } @end See Question&Answers more detail:os...

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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