cgcontext
Copy CGContext into another CGContext
I am performing some CG drawing operations into a CGContext that I created for an MKMapOverlay开发者_StackOverflow中文版View.After drawing into my context, I create an image and paste it into the cont[详细]
2023-03-25 23:27 分类：问答How to draw a PDF to a CGContext with a higher resolution?
I wrote a view to render a PDF Page: -(UIPDFRenderView*) initWithFrame:(CGRect)frame withDocument:(CGPDFDocumentRef*)document withPageNumber:(int)pageNumber[详细]
2023-03-25 11:18 分类：问答Error messages in Console
The console is showing following statements every time I run my application either on simulator or on iPhone.[详细]
2023-03-23 09:13 分类：问答iOS drawing with CGContextStrokePath() lagging/crashing when drawing while zoomed in
Rundown of Problem I an iPad app with a UIImageView inside of a UIScrollView. I want the user to be able to draw on-top of the UIImageView by using a stylus and/or their finger.[详细]
2023-03-23 03:38 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NSString drawInRect causes CGContextShowTextAtPoint to incorrectly display text
I am using a CGContextRef in my iOS application to create a PDF, along with some utility methods that I created to draw items such as lines, text, images, etc.[详细]
2023-03-22 06:17 分类：问答iPhone Drawing Application (Not OpenGL)
I\'m new to iPhone drawing field. I need to draw simple drawing on iPad. After I clicked button (that I created on same UIView)I need to erase those lines I was drawn.[详细]
2023-03-21 20:02 分类：问答CGContextDrawImage eating my memory, any memory leak?
I\'m developing an Mac application on Mac OS X 10.6 using Cocoa and Xcode4, after get image from camera buffer, I need to get the image\'s raw data. Here is the code:[详细]
2023-03-20 19:31 分类：问答How to erase Drawing Lines on UIView
I drew a line on UIView. It\'s working properly. I did the same thing as described here : [question]:http://stackoverflow.co开发者_如何学Pythonm/questions/2595446/drawing-an-image-is-completely-out[详细]
2023-03-19 17:09 分类：问答What this error is invalid context 0x0?
I wrote the following code in ViewDidLoad // Implement viewDidLoad to do additional setup after loading the view, typicallyfroma nib.[详细]
2023-03-18 05:04 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
加载中,请稍侯......