It\'s really a pain, but always when I draw an UIImage in -drawRect:, it\'s upside-down. When I flip the coordinates, the image draws correctly, but at the cost of all other CG functions drawing \"wr
I\'ve tried some code from each of these questions: How to make one color tr开发者_StackOverflowansparent on a UIImage?
UILabel *templabel = [self.wallBoxArray objectAtIndex:i]; for( int i = 0 ; i < [self.wallBoxArray count]; i++)
How can I create/prepare a CALayer offscreen, so that when the page is displayed, then all it has to do is to display the开发者_如何学运维 prepared layer?Render your content into an CGBitmapContext, p
I try to draw some lines with different colors. This code tries to draw two rectangles with 1px thin lines. However, the second rectangle is drawn with 2px width lines, while the first one is drawn
I am getting a lot of strange EXC_BAD_ACCESS crashes on the iPad that only happen on the device and not in the simulator. I am assuming that they are somehow memory related, but I am not sure. They al
CGRect rect1 = backgroundImageView.frame; NSLog(@\"%f,%f,%f,%f\",rect1.origin.x,rect1.o开发者_如何学Gorigin.y,
Cheers, I like strict typing in C. Therefore, I don\'t want to store a 2D vector of floats if I specifically ne开发者_StackOverflow中文版ed integers. Is there an Apple-provided equivalent of CGPoint
My app some times crashes at start-up. In stack-trace only messages from built-in frameworks. An excerpt from a crash log:
I\'m still a little fresh to CoreGraphics programming, so pleas开发者_开发知识库e bear with me. I\'m trying to write an application, which allows the user to rub stuff off an image with the finger. I
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