I have a method where I draw a PDF to a bitmap. Once in a while I see this error in the log when running it on an actual device (not simulator):
me and my friend develop iPad application (a lot of CoreGraphics stuff). But we can\'t find an agreement. I tell him that testing on device is essential, he tells me that testing on iPhone 3G/3GS will
In my drawRect method, I am drawing a PNG image. On top of that, I want to draw a rect with a 20% alpha color, like this:
How would I store CGRect objects in a NSMutableArray, and开发者_StackOverflow社区 then later retrieve them?You need to wrap the CG structures in NSValue classes. So:
I have three CGGradientRef\'s that I need to be able to dynamically recolor. When I Initialise the CGGradientRef\'s the first time I get the expected result, but every time I attempt to change the col
In Mac OS X, every display gets a unique CGDirectDisplayID number assigned to it.You can use CGGetActiveDisplayList() or [NSScreen screens] to access them, among others.Per Apple\'s docs:
in my class I have an attribute IBOutlet UIImageView *imageView; And if I want to draw an image in this view I do : imageView.image = [UIImage imageNamed:@\"foo.png\"];
How can I get flash effect for images got from Camera? After I got image from camera (it shows in UIImageView) and before saving it as a file I\'d like to lig开发者_运维百科hten (in some cases) image
I\'m doing something that\'s a little complicated to sum up in the title, so please bear with me. I\'m writing a Python module that provides an interface to my C++ 开发者_如何学Pythonlibrary, which p
This should be an easy one -- when I u开发者_开发百科se a CGAffineTransformMakeScale on a UIView with width = 0.5 and height = 0.5, it shrinks to the upper left.I need it to shrink around its center.
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