Currently I draw a zig-zap line by CGContextMoveToPoint, CGContextAddLineToPoint, and CGContextStrokePath, following touchesMoved events. How can I smoo开发者_开发问答th the edges of the line? Such th
I\'m working on an app that can change the borders or a rectangular UIImage. The borders will 开发者_开发技巧vary, but will look like the UIImage was cut out with scissors, or something to that affect
Here\'s a picture of one of the stranger problems I\'ve had: I\'m using a plugin architecture to draw things in Core Graphics. The host app creates a context that is passed to the plugin, which dra
I\'m creating a simple drawing application and would like some help with drawing rectangles based on the user\'s touch events. I\'m able to draw a rectangle using Core Graphics from the point in touch
Using the plethora of drawing functions in Cocoa or Quartz it\'s rather easy to draw paths, and fill them using a gradient. I can\'t seem to find an acceptable way however, to开发者_开发百科 \'stroke\
I want to be able to create a greyscale image with no alpha from a png in the app bundle. This works, and I get an image created:
I would like to write a program that can mirror a portion of the main display into a new window.Ideally this new window could then be displayed on an external monitor.I have seen this uiltity for a fl
I\'m running that method in quick succession as fast as I can, and the fa开发者_JAVA技巧ster the better, so obviously if CGDataProviderCopyData() is actually copying the data byte-for-byte, then I thi
I\'m writing a QuickLook plugin. Well, everything works. Just want to try it make better ;). Thus the question.
By overriding the drawrect of my MkAnnotationViews, I am displaying paths using CoreGraphics. T开发者_运维问答he problem I have is when I zoom in pretty close and scroll the map view, the paths drawn
加载中,请稍侯......