core-graphics

相关标签：javascript jquery android 多少钱 iPhone

iOS: is Core Graphics implemented on top of OpenGL?

I have found one diagram that shows Core Graphics implemented above OpenGL, and another that puts it alongside OpenGL. I would think that Apple would be smart t开发者_如何学Pythono give each equal acc[详细]

2023-04-07 11:35 分类：问答
Creating a Smudge tool effect in ipad apps

H开发者_StackOverflow社区ow to create a smudge tool effect in ipad apps using core graphics?.Andy Finnell wrote a blog post about implementing smudge and stamp tools.[详细]

2023-04-07 05:18 分类：问答
CGContextDrawPDFPage Leak 100%

I try to Draw a pdf with CoreGraphics, everything work fine but in instrument there is a 100% leak on : CGContextDrawPDFPage(ctx, page2);[详细]

2023-04-07 05:07 分类：问答
change color and width of some painted lines in an UIImageView

I\'m painting some black lines in an UIImageView (in touchesBegan and touchesMoved methods) and there is one UISlider for modifying the width of these开发者_高级运维 lines and some buttons for modifyi[详细]

2023-04-06 23:36 分类：问答
Understanding UIGraphicsGetCurrentContext()

I\'m trying to understand Quartz and getting the context you have to draw on.If I have a function where I create a context, but then I call another function开发者_开发知识库 to some other drawing to t[详细]

2023-04-06 21:04 分类：问答
Technique to identify a video in iOS camera roll

I\'m trying to solve a specific problem (but this could benefit others) which from googling around doesn\'t seem to have a definitive solution. I think there are probably several partial solutions out[详细]

2023-04-06 17:11 分类：问答
UIView shadow and InterfaceBuilder

I want to add a drop shadow using CALayer to a UI(Image)View. The following code works generally fine previewImage.layer.shadowColor = [[UIColor blackColor] CGColor];[详细]

2023-04-06 16:30 分类：问答
NSSavePanel, CGImageDestinationFinalize and OS X sandbox

I\'m using NSSavePanel to let user select image to save to in my app. Everything worked fine until I enabled app sandboxing and entitlements. The problem occurs with selection of an already existing f[详细]

2023-04-06 10:43 分类：问答
Custom UIButton drawing - stays depressed after touchesEnded

I\'ve made a custom zero-image, Core Graphics drawn UIButton based on Ray Wenderlich\'s Tutorial (the only modifications are to CoolButton\'s drawRect: method, altered drawing code), and it works grea[详细]

2023-04-06 06:06 分类：问答
What is the equivalent of CGImageCreateWithImageInRect in MonoTouch?

What is the equivalent of CGImageCreateWithImageInRect iOS method in MonoTouch? I\'m trying to convert this Objective-C line in C#:[详细]

2023-04-05 23:44 分类：问答