quartz-graphics

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How to draw this effect with any technology on iOS

Hi there, the effect I want to implem开发者_开发百科ent is burning out user\'s signature. I\'ve done the signature drawing with quartz2D. Can any one show me a direction for drawing the burning glow[详细]

2023-04-02 03:04 分类：问答
iOS setting Progress bar value while images are being processed

I have an app processing a couple of images using Quartz, and i wanted to have a UIProgressView that changes after each actions. (e.g. 0.0 0.2 0.4 0.6 0.8 1.0)[详细]

2023-04-01 07:46 分类：问答
UIBezierPath Gives Sharp Edges

When I\'m using a UIBezierPath to draw where the user is touching if the user moves to fast sometimes I get really hard points like the tip of a triangle. Any clue what might be causing th开发者_如何学[详细]

2023-04-01 05:57 分类：问答
How can I add a shadow to a UITableView?

I\'d 开发者_JAVA百科like to add a little drop shadow to a grouped UITableView that I have. How can I achieve this?Changing the bacground image for a cell you can give that effect for when you select t[详细]

2023-03-31 20:47 分类：问答
Shadow on UILabel does not appear

I want to add a little shadow to my UILabel开发者_运维知识库, but it is not showing up. companyLabel.textAlignment = UITextAlignmentLeft;[详细]

2023-03-31 16:58 分类：问答
iOS Quartz/CoreGraphics drawing feathered stroke

I am drawing a path into a CGContext following a set of points collected from the user. There seems to be some random input jitter causing some of the line edges to look jagged. I think a slight feath[详细]

2023-03-31 07:42 分类：问答
What's faster: Creating a gradient programmatically using Quartz2D or just importing an image?

Let\'s assume the file space o开发者_运维问答n the iphone isn\'t an issue, what would perform better? Would there be any noticeable speed/smoothness difference between the two?Whilst not specifically[详细]

2023-03-30 11:53 分类：问答
iPhone: anti-aliasing after rotating

I\'ve load an image into narrow UIImageView - the width is 3px, the height is approx. 10 Then I\'ve rotate the view - and I\'ve got not p开发者_开发技巧leasant picture, with visual distortion (like h[详细]

2023-03-29 14:29 分类：问答
Grab the contents on screen painted via OpenGL

I want to know if its possible to grab the contents of screen/surface painted via OpenGL? and how to do it?[详细]

2023-03-29 13:15 分类：问答
Core Animation drawLayer:inContext driven by NSTimer, am I doing it right?

I\'m doing a project which inv开发者_运维知识库olves Core Animation and AV Foundation. I want to use Core Animation to render some effects, then export it to video file via AV Foundation. The animatio[详细]

2023-03-29 09:25 分类：问答